I have a 2000 trx300fw and I am adjusting the valves. There seems to be two marks on the flywheel. One with a T which I thought was TDC but it seems the rocker arms are tight everytime I find it. However, the F mark which has two lines about 2mm apart, and when I find that the rocker arms have some play. What one do I use?

 

T= Top Dead Center
F= Fire.

 

Thanks for the quick response. Job is done and now it's time to relax.