Bulldog
Member
Newest pitbike engine on the market so here are some details:
The new Yuminashi HK180R-SPL is not only with 181,67cc the biggest displacement engine on the market, it's also the only engine with the most amazing cylinderhead ever used since history of pitbike and Monkey tuning.
The Yuminashi SPL-Head have two huge valves from 31mm intake and 27mm exhaust. The intake is flowed to 28mm diameter and the exhaust is flowed to 25mm to make a perfect connection to a exhaust system with 27mm diameter.
The Yuminashi SPL-Head is using 5mm valve stems and not 5,5mm valve stems like you can see on the 150cc and 160cc that are available everywhere today.
Reinforced valve guides are also installed on this SPL-Head together with real racing springs that makes those high rev's possible.
The piston that has being used on this engine is a high compression racing piston (dome type) with a bore from 64mm to fit the big cylinder.
The crankshaft have a stroke from 56,5mm.
The carburetor is a original KEIHIN PE28mm that comes together with the engine.
The manifold set is a 360° type so that the setup with the big 28mm KEIHIN carburettor would fit on any type of frame.
The clutch is a type of clutch that Brands like Takegawa, Daytona, Kitaco, etc also are using, without a centrifugal filter (oil spinner) and a external filter comes together with the engine. The clutch have 5 clutch plates.
You can order them at this moment at R&Y Concepts in Europe, they ship worldwide (email [email protected] )
The new Yuminashi HK180R-SPL is not only with 181,67cc the biggest displacement engine on the market, it's also the only engine with the most amazing cylinderhead ever used since history of pitbike and Monkey tuning.
The Yuminashi SPL-Head have two huge valves from 31mm intake and 27mm exhaust. The intake is flowed to 28mm diameter and the exhaust is flowed to 25mm to make a perfect connection to a exhaust system with 27mm diameter.
The Yuminashi SPL-Head is using 5mm valve stems and not 5,5mm valve stems like you can see on the 150cc and 160cc that are available everywhere today.
Reinforced valve guides are also installed on this SPL-Head together with real racing springs that makes those high rev's possible.
The piston that has being used on this engine is a high compression racing piston (dome type) with a bore from 64mm to fit the big cylinder.
The crankshaft have a stroke from 56,5mm.
The carburetor is a original KEIHIN PE28mm that comes together with the engine.
The manifold set is a 360° type so that the setup with the big 28mm KEIHIN carburettor would fit on any type of frame.
The clutch is a type of clutch that Brands like Takegawa, Daytona, Kitaco, etc also are using, without a centrifugal filter (oil spinner) and a external filter comes together with the engine. The clutch have 5 clutch plates.
You can order them at this moment at R&Y Concepts in Europe, they ship worldwide (email [email protected] )