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Dirt Bike Discussions By Brand
Honda MX & Off-Road Dirt Bikes
04 Crf450
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[QUOTE="Matt90GT, post: 1372310, member: 30871"] Also replace the cam chain tensioner. They are known to fail on the pre 06 models. It also could be the piston rocking in the bore. They are a short skirt design and factory schedule is 15hours on a piston. For less abrupt power, loose 2-3 teeth on the rear sprocket. Easiest way to do it. For changes from 04-07, they are many. 05 is the next gen frame, much better and narrower frame. Pulled the axle back 2mm on the forks, new intake, new plastic. 06 got everything lowered 5mm, and then 07 has a 41mm carb and smaller exhaust valves for better power. Also 07 has a new decompression cam system and new front brake master cylinder. 04 is the last of the first gen bikes. Maintenance, LOTS of oil and air filters. Change the engine oil every ride or every other ride, tranny every 5th ride, and air filter daily. Also a Hinson clutch basket is a must in the bike as the stocker is pretty soft. [/QUOTE]
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Dirt Bike Discussions By Brand
Honda MX & Off-Road Dirt Bikes
04 Crf450
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