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relentlessracing769 Started a new thread 15 YZ450 Build
7/30/2020 5:48pm hey guys. Im looking at building a race bike. My 15 yz450 has about 120 hours on it. I need to rebuild it and im thinking about building a race bike out of it. I guess what would you recommend to make this bike nasty. I ride xc and enduro and sometimes rock a moto or two. Im 6'4 and...
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relentlessracing769 Started a new thread START ISSUES 15 YZ450F
6/10/2020 2:19pm First I was having problems with a hot start now im having problems with starts at all. Valves are shimmed and in spec. New plug. Good fuel. Different fuel pump. Im at a loss guys. Runs super strong when I bump start it, ran a 2 hour race strong.
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relentlessracing769 Added a reply to 15 YZ450F Hard start problems
5/31/2020 5:34pm No change in backfire and hard start after I adjusted the valves. If I was to guess I would say 50+ hrs on bike since I've purchased it. They did not give me a % but said that it cleared the leak down test. And didn't throw any codes. Timing is on, plug has been changed.
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relentlessracing769 Started a new thread 15 YZ450F Hard start problems
5/31/2020 11:07am Hey guys I'm super stumped right now. I have a 15 yz450f had a decent amount of hours on it. Haven't really kept track. Started getting terribly hard to start. Checked my valves they were out of spec, shimmed them we're good. New plug new gas. I have a hard time getting it to fire, when its cold it fires...
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