two.smoker Posted November 19, 2017 Help! My Honda CRF450R will not start! We were at Pismo Dunes and it started and ran perfectly until I let it sit for about an hour and there was gas under the bike coming from the over flow. I tried to start it and nothing happend. We took it to the beach and pull started it and after about 2 minutes of pulling, it finally fired. I rode around for a while and killed it on accident and it would not start back up. We came back home and I took apart the carb and cleaned it and it still would not fire. I don't know what else to do. Please help. By the way we also barley got it rebuilt and the bike only has about 2 hours on it. I wish I had my two stroke back! Share this post Link to post Share on other sites
TheSnide Posted November 19, 2017 Those are the exact same symptoms of mine when it had shot valve guides and valves would stick after a day of riding Share this post Link to post Share on other sites
two.smoker Posted November 19, 2017 Intake or exhaust? Share this post Link to post Share on other sites
jblob My Rides (2) Posted November 19, 2017 Sand riding makes valves more likely. Either because of a bad air filter letting sand in or just how hard you run the engine in the dunes. If you have to pull start and the carb isn't clogged up it's probably valves. Did you triple check that your timing marks are all lined up? Share this post Link to post Share on other sites
two.smoker Posted November 19, 2017 I did not rebuild it myself but that's something I'll look into Share this post Link to post Share on other sites
HRC27 My Rides (2) Posted November 19, 2017 (edited) How are your clearances? Edited November 19, 2017 by HRC27 Share this post Link to post Share on other sites
