high compression piston
Fuel injection small upgrade cylinder kit doesn't need to machine engine case.
-NO need ECU, No change jet and throttle
-Just go with original (STD) parts
-Customized dome, high compression piston
YAMAHA Cygnus 125,110/115,S-MAX, BWS125
KYMCO Racing, Many, VJR100/110, G5, G6
SYM Fighter, Jet Power, IRX115, Z1