Crf250r rebuild how often

2 STROKE EXPERTS! When and how often to rebuild 2 stroke dirt bike? 10 POINTS!? Hi, I have a 2006 Yamaha YZ85 that I got a few weeks ago. Ready To Bolt On With No Work Needed. even then it will still last forever but maybe try a rebuild every 60 hours(if so <1 ) if you don't want to take the risk of blowing it up. i like that they split the oil, but then again 1 bad seal and it all becomes a mess. pleasure of performing a complete frame down rebuild on a 2007 CRF250R that came  Results 1 - 10 of 2000 DNJ EK296A Engine Rebuild Kit for 1992-1995 / Honda/Civic, If you are buying a brand new 4t I would look at kawi and the 2014 Honda crf250r. i have a lot of knowledge on the crf250r motor. HOw often do you have to adjust the valves and replace the valves. I ride a Honda CRF250R normally, but it was really an eye-opener to ride  Mar 29, 2019 Regularly checking valve clearances on your modern 4-stroke racing machine is critical to keeping you and your bike competitive. If your ATV ran when you parked it but refuses to pop when you finally decide to ride it again, chances are the carburetor is a mess. This information is intended to help you abbreviations are used to identify the respective When you own a Honda, you’re part of a avoid damage to your CRF, other property, or the parts or system. only problem is it has seazed bottom end. . you wont need to rebuild it at all, 1. Additional Videos. information that is preceded by a NOTICE symbol. 15. However, the right materials can make all Page 3 Honda CRF250R OWNER’S MANUAL & COMPETITION HANDBOOK Page 4 Throughout this manual, the following information is intended to help you avoid damage abbreviations are used to identify the respective When you own a Honda, you’re part of a to your Honda, other property, or the environment. otherwise, these are How often crf250r rebuild? What is faster a crf250r or a yz250? A YZ250 is much faster than a CRF250r. The Many after-market repair services, such as the mass-marketers (chain stores), hire non-Honda-trained people to work on your high-technology vehicle. It received an all-new chassis that is identical to its big brother CRF450R save for some fitment issues with the smaller engine and some big updates to the engine to boost the power and the engine character. manual , 2015 honda crf250r shop manual , cobra cxt145 manual , mexico immigration guide 2015 , carrier ac r410 manual , lennox complete heat manual , honda generator eu2015i manual , study materials for praxis test 5203 , user manual for blood bank management system , the ultimate guide to pregnancy for lesbians how to stay sane and care for 2 days ago · Keihin CVK32 Keihin CVK32 Keihin CVK34 Keihin CVK36 Keihin CVK40 Keihin CVKR-D32 (2) Main Jet 138 135 142 Note the locations of the jets and holder during Get the best deal for Keihin Motorcycle Carburettors from the largest online selection at eBay. where i am undertaking the rebuild doesn’t have a connection to the internet or a very limited connection at least. 8. Introduction Congratulations on choosing your Honda CRF motocross motorcycle. Cyclepedia Honda CRF450 Repair Manual – Could not have reassembled this engine without the simple and complete instructions…. Honda CRF250R 2007, Top-End Repair Kit by Namura®. TIME TO COMPLETE: 10 minutes. But these symptoms may come from other bad sensors, parts, or components. motor side the 5w40 is a fantastic option. I personally change mine about every 200-300 miles and use Honda HP4 it is a Synthetic blend. There are lots of ways to know when it's time for a rebuild—the most common is when the motor stops running in a cloud of black smoke. Whether gas is delivered via carburetor, throttle body, or fuel injector the proper fuel mixture is critical to a smooth running engine. This is often fairly frequent while in the society due to the fact manual book is considered as complementary bundle I changed the radiator coolant to Engine Ice, performing the obligatory hot rinse with 50/50 distilled water and white vinegar, followed by a distilled water rinse. We have got that will help you buy, livingroom, bedroom, ktichen and more. Cheapskates can get by for a while by filling in the nicks with Loctite Weld -- the liquid welding stuff that sets sooner and is stronger than JB Weld -- but we don't recommend it, as it'll eventually pop out and you'll have to rebuild the forks again. 0: This Part Is In Perfect Working Condition With No Major Scratches But Is Used And May Show Some Wear. ossagp likes this. nail, screw, so I fitted a new tyre. The previous owner said the engine has never been apart and has very low hours, so it has never had a top end rebuild. How to - Four-Stroke Top End Rebuild (Part 2). They provide you convenience by coming to your home or office. Most bikes have removable cam sprockets, but the CRF250R and CRF250X do not. This is fairly prevalent while in the society since manual book is considered as complementary bundle, nothing Softcover – 615 pages – Honda CRF250R CRF250X CRF450R CRF450X 2002 – 2005 Clymer Owners Service Repair Manual Covers the following Models: Honda CRF250R 2002-2005 Honda CRF250X 2002-2005 Honda CRF450R 2002-2005 Honda CRF450X 2002-2005Contents: QUICK REFERENCE DATA GENERAL INFORMATIONManual organization / Warnings cautions and notes / Safety / Serial numbers / Fasteners / Shop Supplies The engine in your 2008 Honda Motorcycle CRF250R requires three basic things to run: fuel, air, and fire. The crazy thing is I might just sell my prized CR250AF, as the 2018 Honda CRF250R looks to be a stunner. I changed the radiator coolant to Engine Ice, performing the obligatory hot rinse with 50/50 distilled water and white vinegar, followed by a distilled water rinse. Because of their incredible power output and insane RPM There are times you should have your original crank, cylinder or head rebuilt, and there are times you should buy a whole new part. 9. ORG07 CRF250R Engine Rebuild Bottom End HowDownload 07 CRF250R Engine Rebuild Bottom End How Ebook PDF:In this video blog post the 2007 Honda CRF250R is covered However it also covers 2004 2013 CRF250R CRF250X models Service manual Here are links to service manuals you can 2009 Honda Crf250r Owners Manual – Amongst countless individuals who acquire 2009 Honda Crf250r Owners Manual immediately after obtaining a Honda car or truck, only handful of of them desire to devote hrs digging info from the book. When you are using all OEM parts, which includes all new bearings throughout the engine, a cylinder head (reconditioned or new), new valvetrain, new crank, new piston, new cam chain and tensioner, and a freshly honed cylinder, the cost comes out to be between $1300 and $1500. STEP ONE: My 2004 CRF250x won't start. Anyway what is the normal maintenance needed. Setting and adjusting the valve lash is often overlooked as a simplistic and unsophisticated task for proper engine maintenance, yet much can be gained by paying attention to valve lash. Under hard use, you should think about replacing the piston in a sport ATV after 50 hours. How to know when to get engine rebuild? | Quote “If I remember how this worked, you’d put a side on, and then you’d go and have something to eat, and then you’d put another side on. qxd 2008. Engine has been disassembled for 5 years and it was assembled easily just by the great pictures and instructions…. Our mechanics are mobile, which means they don't have the overhead that repair shops have. unless your a guy that holds it pinned 24/7. HOOPDISTRICTDC. Some ex-dealership technicians open their own independent shops and specialize in that brand of vehicle. These Parts May Have Scratches, Dings, Dents Or Some Worn Parts. I had a new piston put in at 50 hours already. i own a 2007 crf250r great for trails and really reliable( if oil is maintained properly). How do you know if a throttle position sensor (TPS) is bad? Of course, some symptoms can tell you when a TPS may be bad. A new wiseco 13. It has spark. How to Check Valve Clearances on a Honda CRF250R. I have actually raced my CRF250R for 2 seasons now without the need of a top end job, which is one of the perks of a 4 stroke. 0w30 or 0w20 even with super high moly and all kinds of anti-friction additives. So you need to conduct some tests. parts or system. However, plenty of owners get away with over 150 hours without a rebuild on a 450cc. Sleeve will rebuild your original crank for $80 plus parts, which is a good deal. 2012 bmw x5 x6 xdrive 35i 50i 35d x5 m x6 m owners manual, oem honda crf250r service manual, making connections level 1 teachers manual I have a 2016 model and had four front punctures (pin hole) with the original tyre. Thanks I will The Top Ten Signs You May Need To Rebuild Your Dirt Bike Engine Hard to Start - This could be due to a fueling issue, ignition issue, decompression system out of adjustment, worn rings, worn valves and seats, a stuck valve, leaking gaskets, or cam timing that is off. If your head needs new seats and guides, it's tough to beat the price of a brand-new one, especially from Honda. Because of  Nov 25, 2014 Get all of the gaskets and seals ahead of time so that $3 oil seal is on-hand when needed and doesn't require another trip to the parts counter  When pushed in, it acts as an idle adjustment screw. com. it makes more sense to loose 1000$ when you sell the bike than to put a new top end in it. Timing can't be adjusted. How to - replace the valves on your motorcycle or atv. worldwide family of satisfied customers – people environment. The pin hole was in the same spot each time. 46 The Honda Shop Midland can now offer amazing deals on full or partial rebuild kits to suit Honda CRF250R’s of all years. I had checked the valves ~20 hours ago and an intake valve was very tight so I knew this day was coming. Diesel engines often use a turbo (turbocharger) and intercooler to boost engine power output, but a worn diesel fuel injector pump could mean a rough running engine or lack of power. This is after a rebuild of the entire engine from crankshaft to valves. I currently have a CRF230F and its getting to small for me now so I want to go to the next step and that's the 250X. 05 Crf250r Repair Bq37299 New Version 2019 Free Download Books 05 Crf250r Repair Bq37299 New Version An excellent 05 Crf250r Repair Bq37299 New Version takes references posted by books. How Often SHOULD You Change Shock Oil? I've only changed it when the shock breaks, or when i take them apart, but sometimes there isnt much oil in them, or the oil is black. Generally speaking, their Honda product knowledge is minimal. 17 15:39 ページ2 Honda CRF250R OWNER’S MANUAL & COMPETITION HANDBOOK Page 4 250R_Contents. Carb Repair Kits and Seal Kits A list of our Carb repair kits for Keihin and Mikuni Carbs. g. 2007 Honda Crf250r Owners Manual – Amid a huge number of men and women who receive 2007 Honda Crf250r Owners Manual just after obtaining a Honda auto, only handful of of them choose to invest hours digging data from the book. Whether you choose Synthetic, Synthetic Blend, or Dyno Oil stick with a Motorcycle specific oil. Rocky Mountain ATV MC 1,067,825 views The video series is actually 3 parts and totals 5 hours in length: Bottom end – 2 hours 30 minutes long, video starts with engine removed from frame. ? I have a 2007 crf250r with 27 hours on it. However, largely it CRF250R SERVICE REPAIR MANUAL Read Online at NAZANBEKIROGLU. How often should I be changing the tranny oil, and engine oil. Last year, 2014, was the big change year for the CRF250R. The goal is to rebuild it before that happens. the Hondas are the hardest on the valves, my KTMs are not too bad only needing adjustment every 30 hrs or so on my RFS series motor and 50 hrs or so on the XC4 series 250 motor. ) or just an overall crappy feeling clutch Page 3 250R_Contents. thank you. If you've been making utility and cell phone payments on time, there is a way for you to improve your credit score by factoring in those payments through a new, free product called Experian Boost. Fine means the ebook was read, yet its not damaged. How often do you have to change the piston on a 2006 crf250r. Otherwise read on for a great run down of what a full four stroke dirt bike engine rebuild in your own garage costs. 2007 crf 250r in great shape, only wanting to sell All new plastic all the way around 2012 front number plate and front fender pro taper bars, new chain and sprockets, new top end rebuild maybe 3 hours on it. CRF450R Engine; CRF 450 Engine Case; New top bottom end rebuild kit for Honda CRF 450R, 05 HONDA CRF450R ENGINE PARTS LOT GEARS SPRING BOLTS CRF450X top end rebuild. Repair manuals are essential pieces of literature that are available for DIY mechanics. L. Valve adjustment – 1 hour long and is a maintenance item that every owner should learn how to do properly. What’s often unsaid is that a well-designed and well-executed machine allows the rider to do what they do best: apply their well-honed skills to winning. I will be riding track and racing once a month. Dr. A critical aspect of any rebuild, gaskets are often given little thought. How often do you have to do the bottom end. you can run just about anything on that side and be good. Pistons, rings and barrels are consumable parts in high-tech four-strokes – no matter how well you treat them, they’ll wear out. COM Online Source For Free Ebook and Pdf Downloads Crf250r Manual File Reading is often a favourite pastime for lots of people. share: I like to ride alot and was hoping i could get long hours out of the top end before a rebuild, which costs alot as you pointed out. Congratulations on choosing your Honda CRF motocross motorcycle. The TPS connects to the throttle plate on the throttle body. So far the bike has been great but I think it is time for an engine rebuild. When you own a Honda, you're part of a worldwide family of satisfied customers-people. By the second day, the kickstarter could be pushed down with a light push with your hand and it would not idle. A piston and ring set might last you anywhere from 10-50 hours depending on how hard you ride and how often you clean your air filter and change your oil and filter. 0001 in. I have been using cyclepedia for over 5 years to keep my motorcycle running well and affordable so I can repair the CRF450 myself…. A 250 two-stroke might go 40 hours in the hands of a local Vet or Novice (a Pro should change them every 15 hours). I always did my 2 strokes every season though. 4 Hours to tear the motor down. Through this new opt-in product, consumers can allow Experian to connect to their bank accounts to identify utility and telecom payment history. How quickly the liver can repair itself Alcohol consumption and liver health is a fine balance – you don’t have to become a teetotaler to stay healthy, but you should be aware of how alcohol affects one of the most important organs of the body and what you can do to keep it healthy. The OEM clutch basket and drive cushions on most dirt bikes, (especially those of the larger displacement) are prone to wear and grooving of the outer fingers of the basket (as well as on the inner hub) which often leads to, or results in broken clutch plates, a clutch that drags, (a bike that tries to creep when in gear and the clutch is pulled in. As far as how often to change the oil, the manual recommends every 30 days of riding or 1,000 miles. Now would also be a good time to make sure that the leg is actually straight. Re: Eric Gorr's Top End Rebuild tips--CRF450 They all do it. A 125 two-stroke’s piston and rings should be changed every 15 hours (a Pro should change them every 7 hours). The eBay searches are saved, and I see second-hand kits come up often. Honda CRF250R CRF250X CRF250 CRF 250 This is the same manual motorcycle dealerships use to repair your bike. Took me 3 hours to get the motor out of the bike. That’s right this hi-tech Honda CRF250R stainless steel oil filter will not only last the life of your CRF250R! Top End Rebuild Only (labor only) Due to the nature of and use of race engines most shops and re-builders do not offer a warranty of any kind. Yamaha never admitted to having problems with the transmissions in their Raptors in 2001, but you bet they fixed the problem the next year. Part Number: WPK0007 Hot Rods water pump repair kit rebuilds the seals and bearings of the water pump Includes High pressure/temperature mechanical and rubber seals High Quality Precision Micro Bearings meet or exceed OEM Standards Does not include clutch cover gasket Fits: 2010-15 Honda CRF250R Items Included Fitment Honda Crv 4x4 2000 Batteries Do-It-Yourself Rebuild. This is the single operation that is fairly unique to a four-stroke top end rebuild. au MXSP FORK OIL SEAL KIT HONDA APPLICATIONS- CRF250R 2004-2009, CRF250X 2004-2017, CRF450R 2002-2008, CRF450X 2005-2017 SIZE 47x58x10 The quality of MXSP Honda CRF250R CRF250X CRF450R CRF450X fork oil seals meets or exceeds OEM quality. First, we need to determine how to know when the right time comes  How-To: Honda CRF250R/CRF250X Top & Bottom Engine Rebuild . 2 comp piston went in along with a kibblewhite steel intake valve kit  Oct 9, 2013 Racer X 2006 CRF250R - The Original Dual-Pipe Honda 250! Sure, the all-new 2014 CRF250 has dual pipes, but we turned a past-its-prime  Mar 25, 2016 He also likes the newer chassis of the 2010 CRF250R when paying shop rates for a rebuild along these lines would be astronomical. How much tranny oil do you put in 2005 CRF250R after oil change? How much tranny oil do you put in a 2005 Honda - Honda 2005 CRF 250 R question The repair manual 2005 Honda CRF250R OWNER’S MANUAL & COMPETITION HANDBOOK. We didn't expect much change for the 2004 125cc-class shootout-winning CRF250R (Jan '04). The video series is actually 3 parts and totals 5 hours in length: Bottom end – 2 hours 30 minutes long, video starts with engine removed from frame. Top end – about 2 hours long, completed while engine is in frame. Hey guys I have a 2012 crf250r with 95 hours on it. Get a 450, change oil every 3 hrs . more confident, and possibly rebuild some of your lost technique. So complete tear down and rebuild. 4 Hours to put it back together 5 minutes to squeeze the motor back in the frame. . I have a 2006 crf250r which is not starting, I have had the bike in the shop and they could not get it to start and said it needed a full engine rebuild. You can blame it on what passes for pump gasoline today—or bad luck, karma or even your annoying little brother—but you are lying to yourself. Compression seem excellent. Does anybody know the recommended rebuild times for racing on a 2018 When does it need a complete top end rebuild with valves and  Apr 15, 2015 When to rebuild your four-stroke dirt bike engine? This is a great question. I can do the motor tear down and rebuild. CRF250R SERVICE REPAIR MANUAL Read Online at NAZANBEKIROGLU. low compresion. (If the dealer did not already do it, remove the radiator cap safety screw before you try to take the cap off. Manufacturers generally recommend that you change your bike’s piston every 40 to 80 hours. 46 – $1,253. A. 07. Fast, Free Shipping on Orders Over $79 on Wiseco Top And Bottom End Kit - 4-Stroke & Wiseco and gear at MotoSport. The most we hoped for was more snap in the middle, to get it closer to the Yamaha YZ250F on tight courses Inspect the brake pad thickness periodically and more often if you ride in muddy or sandy conditions. First time I had ever done that. We go through replacing the cylinder and the piston as Motorcycle Top End Rebuild for Four-Stroke (Part 2 of 2) - Duration: 9:49. This is often fairly frequent while in the society due to the fact manual book is considered as complementary bundle 2008 Honda Crf250r Battery Secrets to Rebuild. Regularly checking valve clearances on your modern 4-stroke racing machine is critical to keeping you and your bike competitive. I am comfortable with doing all the mechanical work and even doing the valves after every ride if needed (although if they went out of spec every single ride, I don't think anyone would want one except to race it) Hey mate, im currently rebuilding my Crf250R, it ceased under very similar circumstances. Manual covers ronal March 21, 2015 at 7:05 pm. The transmission and engine have separate oil compartments. D ([951] 808-1114) sells a great one. The symptoms, bike was getting hard to kick start on the last couple of rides when we first arrived at the forrest, however, it would roll start. On the subsequent ride, the radiator fan seemed to come on less often. Change filter every ride . Most of the time I am at about 2/3 throttle, I don&#39;t rev the heck out of it. I don't mean like a dark grey, i mean black. I really want to stick with Honda but I hear so many things about the 250X on maintenance and the big thing I hear is REBUILD. Not Properly maintaining a modern four-stroke can create an extremely expensive repair bill. Water jackets need to be incorporated into cylinder heads to cool them down so they don't completely distort and burn out the head gaskets. My first time but, I can do this. I have blown out the brass fitings in the carb. The large number of ebooks that are used as recommendations can be used as a benchmark with regard to assessing quality. That was the one saving cost in all this. ORG07 CRF250R Engine Rebuild Bottom End HowDownload 07 CRF250R Engine Rebuild Bottom End How Ebook PDF:In this video blog post the 2007 Honda CRF250R is covered However it also covers 2004 2013 CRF250R CRF250X models Service manual Here are links to service manuals you can PART RATING SCALE. The bike has a total of 147 hours on it, which made me a prime candidate for freshening up the cylinder head. This is valve adjustment times, not valve tear down and rebuild times. i Not every vehicle owner knows what to look for, so how do you tell when your brake rotors worn out? Brakes are vital to the vehicle. Pro X Valve Spring Kit. Inspect the brake pad thickness periodically and more often if you ride in muddy or sandy conditions. This way you end up with a fresh bike every year and not a fresh top end and a clapped out bike. im going to use the stock valves, but having the seats re-cut, and new springs/seals installed. It’s no wonder then that Honda’s four-stroke CRF250R motocrosser is fast-becoming the winning platform for numerous competitors in multiple disciplines. Squealing brakes can sometimes be a symptom that something isn't right with your system. If you are looking for Honda Crv 4x4 2000 Batteries Do-It-Yourself Rebuild that come with low prices, you have come to the right place. i was wondering if there was a way i could download the video (i have paid for it) so i can watch it while i work on the engine. ” … Follow along as DIY Moto Fix’s Paul Olesen teaches you how to professionally rebuild the top end on your 2002 to 2006 Honda CRF 450 engine. Whether you are repairing a Suzuki, Honda or Yamaha, they have the right manuals to help you repair your vehicle. Yes. A 250F piston can go 40 hours (less in the hands of a Pro). Manufacturers can only warranty their part if it breaks. the compression dropped a little. If you are looking for 2008 Honda Crf250r Battery Secrets to Rebuild that come with low prices, you have come to the right place. 2015 is a minor update year but a big change to an air fork. The valve clearance should be checked and the piston replaced after 6 races or 15 hours of use. i have about 105 hours on mine, and they have not changed !!! but, i do not race, or ride too hard. 2008 Honda Crf250r Lh16380 New Version 2019 2008 Honda CRF250R Owners Manual 174 Pages Download 2008 Honda CRF250R Owners Manual 174 Pages Ebook PDF:Honda 2008 CRF250R Owners Manual 2008 Honda CRF250R Owners Manual Posted on 25 Sep 2015 Model 2008 Honda CRF250R Pages 174 as important to observe the break in guidelines and Cometic Bottom End Gasket KitPart Number: C3415 Bottom End rebuild gasket kits include all gaskets needed for a lower end rebuild (base gasket not included). Unfortunately, our exchange rate currently makes it a little too much of a sting for now. Keep an hour meter on your ATV. same here for the valves. How to - Adjust  Dec 15, 2017 It also can be a great bike when you're looking to put a little more fun back into . HONDA CRF250X Dirt Bike Online Parts – mxserviceparts. Visit your local NAPA Auto Parts for all your 2006 Honda Motorcycle CRF250R fuel and emissions needs including diesel, heavy duty truck, and agricultural. 2006 Crf250r Repair Rf58668 New Version 2019 Free Download Books 2006 Crf250r Repair Rf58668 New Version A great 2006 Crf250r Repair Rf58668 New Version takes references from their books. CRF250R Honda 2004-2009 Motorcycle Service Manual. Shop with the guys that ride! CRF250R – Top End Rebuild $683. png images/logo. Good initial set up and keeping a close eye on the valve lash can alert you to a problem before it leads to a pernicious death of your powerplant. Spring steel gaskets are shim designed and coated with a 0. I ride at the track but I race in the beginner class. right now it is apart for a new top end, only because i wanted new piston/rings and such. Ride it for 30 hrs , sell it and get a new one. How often should I change my oil on my crf250r. How many hours do you have to replace this stuff. The YZ250 is a 2 stroke where as the CRF250r is a four stroke. Is there any other mainence. It gets fuel from the tank to the carb. When you need to rebuild your engine, you probably don't want to be . Right now I am changing it every 5 hours. Because of their incredible power output and insane RPM The last item that I would like to do is get some A-kit suspension. HONDA… Page 2 2012 Honda CRF250R OWNER’S MANUAL & COMPETITION HANDBOOK; Page 3 NOTICE symbol. Blais Racing Services offers a limited warranty that covers faulty workmanship for thirty days. 0: This Part Is Virtually New And Is Usually From A Race Team Take Off That Has Less Than 30 Minutes Total On The Part Imagine a Honda CRF 250R/RX oil filter you would never have to replace, in turn saving you a lot of cash, one that so technically advanced it's based on technology that is used in NASCAR, Formula One and the aerospace industry. Each time I checked the outside of the tyre and couldn't find anything e. hey guys i picked up a cheap crf250r. OEM parts were used when this engine was rebuilt, however you can save some money  Feb 23, 2016 The bike was also getting harder to start when hot. 17 15:39 ページ3 Introduction Congratulations on choosing your Honda CRF As you read this manual, you will find motocross motorcycle. Depending on your skill level and riding styles you should check these every 10-20 hours. Quality materials mean increased longevity and continued performance. The cylinder head reaches the highest temperature of any engine component, often thousands of degrees. i was wondering if anyone hear could help me out on what the problem is. Sometimes it can be a simple matter and easy to resolve. STEP ONE: Introduction. If you are a serious racer you need to rebuild the top end before every season but that is it. How much should a carb rebuild/clean cost? Considering the labor to get to them, pull them off, rebuild, and replace, $550 is a steal, and IMHO, $750 might not be It depends on the type of car you drive and the auto repair shop you go to. thickness of silicone on both sides. The large number of guides that are used as personal references can be used as a benchmark to get assessing quality. mostly trail stuff really. crf250r rebuild how often

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