Why does my YZ450F not start without choke?
Without the choke it eventually began to start but backfire immediately. The issue seems to happen when THE BIKE IS WARMED UP. Once it is warmed up it will not start without the choke/or start like a bastard. THIS IS NOT AN ISSUE WITH THE STARTER CLUTCH. The bike starts fine after being warned up shortly with/without the choke.
What are the problems with the Yamaha YZ450F?
– Intake valves were completely out of spec and needed to be replaced (had no effect on 3rd gear). – Starter clutch went at 4 hours on new motor. – No warrenty/compensation from Yamaha. – Just shimmed one intake valve that was so tight you couldn’t get a 4 in it (roughly 12 hours).
When did Yamaha replace the motor on my Fourm?
Hey everyone, back again. For those that never saw the problems I’ve been having in my other fourm here is a quick run down: – Motor replaced at 6 hours (3rd gear slipping and could never find the issue…5 weeks off the bike before Yamaha replaced the motor).
What to do when your four stroke engine is stuck?
For a four stroke, you must make sure the valves are closed. Because the engine is frozen, you can’t turn it over to close the valves. Therefore, you must remove the cams or rocker arms so the valves will close. To do this, you may have to cut the cam chain.
Without the choke it eventually began to start but backfire immediately. The issue seems to happen when THE BIKE IS WARMED UP. Once it is warmed up it will not start without the choke/or start like a bastard. THIS IS NOT AN ISSUE WITH THE STARTER CLUTCH. The bike starts fine after being warned up shortly with/without the choke.
– Intake valves were completely out of spec and needed to be replaced (had no effect on 3rd gear). – Starter clutch went at 4 hours on new motor. – No warrenty/compensation from Yamaha. – Just shimmed one intake valve that was so tight you couldn’t get a 4 in it (roughly 12 hours).
Hey everyone, back again. For those that never saw the problems I’ve been having in my other fourm here is a quick run down: – Motor replaced at 6 hours (3rd gear slipping and could never find the issue…5 weeks off the bike before Yamaha replaced the motor).