2004 - Present Honda CRF50
and 15% over springs increase grabbing power which makes for an overall stronger and smoother clutch assembly
006" Exhaust (Valve lash is very critical on this camshaft for optimal performance
and Performance Camshaft package deal
5mm TBW1103
TB 108cc Big Bore Kit, V1 Race Head, & 24mm Carb Kit – Honda 50cc & 70cc Various Models Electrical 2004 - Present Honda CRF50TB 108cc Big Bore Kit, V1 Race Head, & 24mm Carb Kit Honda 50cc & 70cc Various Models TBparts 108cc V1 Race Head Kit, 52mm Bore Kit, & 24mm Carb Kit. Converts the following stock engines to 108cc: 1968 1979 3 speed Z50 & CT70. Also 1973 1980 ATC70. Starting with the V1 cylinder heads larger 25 22mm stainless steel (21 4N) valves, better porting, larger cam, improved valve geometry and superior quality this new setup will rev quicker, farther, and make