I have a 2003 YZ450F that I bought used a couple months ago. This is my first bike and I am hoping I didn't buy a lemon. It has always been very hard to get back started if it stalls out on the trails and last weekend I noticed a loss of power and some more then usual noise coming from her so I shut it off right away, now the bike will not run unless you give it gas the whole time. I have completely rebuilt the carb and checked the operation of the hot start lever and all that. So today I pull the valve cover off and start checking clearances
I find it odd that some have worn tighter and others looser
Is it worth re shimming these or am I looking at new valves, I know that with these titanium valves once they start they don't stop, I just am curious how long they would hold up if I just re shim them
Edited by 2whls4life, November 18, 2010 - 02:18 PM.