Engine SHUPA 125/129 SH - 4V
Racing engine with 4-valve Takegawa SH-4V head
Engine with maximum power and torque parameters for all speedway tracks.
Series with big crankshaft and with reinforced crankcase.
Engine technical parameters and tuning description:
4-stroke one-cylinder, capacity 128,3 ccm , bore 54 mm, stroke 56,2 mm, max. power up to 19,5 PS **
piston ε =12,0, four valve Takegawa SH head with canal surface tuning
camshaft 20/25, alu-forged rocker arms with rollers
2x intake valve D22,5 mm, 2x exhaust valve D18,5 mm , valve stem D 4.0mm
crankcase, shifting, starting, and further parts are impoved for speedway using 5-plates clutch with reinforced springs
3. speed gearbox, racing ignition with outer rotor
** max. engine power depends on the adjustment of the engine and accessories
FORGED CRANKSHAFT "PVL" IGNITION
Each engine is checked and adjusted on engine brake DYNOmite