XT225 '92 - '07 TW200 '87 - '25 Adjusting your valves or setting your cam chain tension? Here are the O-Rings that fit in the TDC sight plug and the crankshaft nut access plug. Add Valve Clearance Feeler Gauge Set Valve Clearance Feeler Gauge Set +$12.95 Add Valve Adjust Wrench Valve Adjustment Wrench Set +$34.95 Ships same business day $11.95