how many mm can the stroke be extended on a stock GY6 150cc, without having to add spacers/risers?
If I recall there's either 2, or 2.5mm....
thought you need spacer for all... or perhaps just extra gaskets.
You don''t need a riser/spacer/extra gaskets for some stroker kits. Alleyoop has a 60mm crank (which is +2.2mm) and he doesn't have any spacers.
Take a look at the picture i'm including. The space called the "clearance volume", that's the space I'm talking about. A stock GY6 150cc I'm pretty sure has a clearance volume of 2.5mm... When you you fill that gap, that when you create what's called a "high compression" engine and it's when you're best served with a forged piston.
Last Edit: Mar 28, 2015 15:23:28 GMT -5 by dmartin95
Bintelli - Havoc - 150cc x 2 Yamaha 2015 S MAX (XC155) TaoTao ATM-50 BMS Heritage - Taida 191cc DF moto / Sunny (hunter/phantom style) 155cc (4 valve) Taotao Quantum Tour - 232cc, 4 valve water cooled Taida