2002 XR100 Piston/Valve clearance

02 Honda XR 100 R discussion forum:


2002 XR100 Piston/Valve clearance

2002 XR100 Piston/Valve clearance 
Chris H. said 2015-11-13 14:54 
 
I am rebuilding a 2002 XR100 for my daughter and am having a problem setting the timing. I bought it used, never ran and I suspect that the wrong piston was installed. With the time set properly the piston hits the exhaust valve preventing the engine from turning over. I´ve seen photo´s of pistons for these bikes with TWO indentations, one for each valve it appears. The piston in my bike only has one indentation. What am I missing? This is a simple engine. Thanks 
 
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