Edited by Wr822, January 19, 2012 - 09:47 AM.
Very odd starting problem on wr450
Posted January 19, 2012 - 09:46 AM
Posted January 19, 2012 - 09:53 AM
Posted January 19, 2012 - 10:37 PM
Posted January 20, 2012 - 07:02 AM
Edited by Wr822, January 20, 2012 - 07:06 AM.
Posted January 20, 2012 - 10:50 PM
1) If it started acting up after a top end than got harder to start later I would pull the valve cover and have a look at cam timing and valve clearance.
I use stock cam timing only. I think advancing the exhaust cam (or whatever that yz timing mod is) is 400cc & 426cc only. Like the other guys said tight valves can run ok but be way hard to start.
2) check the plug and make sure you have good spark and good fuel
3) is compression ok. I think you would notice somthing is up when kicking it.
or open the carb up and make sure its all clear.
you want to check the valves anyway so start there and eliminate that. look everything over good and rotate it around to be 100% sure its happy under the valve cover.
thats what i would do
Posted January 21, 2012 - 07:43 AM
Posted January 21, 2012 - 08:37 PM
Posted January 22, 2012 - 07:49 AM
Posted February 15, 2012 - 09:01 AM
Edited by Wr822, February 15, 2012 - 09:02 AM.
Posted February 15, 2012 - 12:56 PM