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Below are the available bulk discount rates for each individual item when you purchase a certain amount
● 170CC / 62MM (FOR STD 20/17MM VALVES 4V HEAD) FLAT HIGH LIFT, HIGH COMP. PISTON SET (14MM PIN) (eSP+ 125CC/150CC/160CC) (13102-K0S-162A)
● With this YUMINASHI 62mm high compression piston set you will get a well balanced lighter piston with a higher compression ratio compared to stock for the STD HONDA 20/17mm valves cylinder head, and perfectly able to run your high performance high lift camshaft...
● The hard chromium plating layered (Cr) piston rings which come with the set are produced by very strict Japanese standards and has excellent characteristics which combine the original properties of chromium metal with the advantages of electro-deposits!
The main benefits from the chrominum plating layered piston rings are extremely high hardness of HmV (Micro Vickers), 800 to 1100 (cf. gray cast iron 220 to 270), high melting point of approx. 1800°C (cf. cast iron 1200°C), good thermal conductivity and corrosion resistance, a low friction factor and excellent wear resistance, such features are very effective in preventing piston ring wear.
● The enlightened piston is made from A-grade materials and the piston skirts come with a molybdenum coating. The Anti-detonation grooves on the top ringland provide several advantages, which include further atomization of the combustion charge to prevent damage to the piston and ring caused by pre-ignition. These grooves also prevent carbon build up on the ring land which can cause the compression ring to stick in the ring groove.
The pressure seal groove will prevent gas build up below the top compression ring; these gases can cause the ring to lift from the ring groove. Unseating of the ring will result in compression losses and lower performance.
※ The valves of the 160cc and 125cc head are the same size, there is no difference in valve size between the 125 and 160 4V head (YUMINASHI GT220 BIG VALVE & PORTS HEAD is available with 22/19mm valves if you want to upgrade the valves and the ports size (LINK)).
※ If you are upgrading from a 125cc engine, then we recommend to install a 140cc/min 8-holes injector (LINK), if you are upgrading your 160cc 4V engine, then you don't need to install another injector, the stock injector is large enough to run this piston.
※ If you need the 62mm piston for the YUMINASHI GT220 BIG VALVE CYLINDER HEAD, then you need to order the 60mm piston with part number 13102-K0S-262A.
※ Recommended to be installed with YUMINASHI SPORTS TOURING Camshaft ST238 (14100-K0S-238).
● THIS PISTON SET IS THE CORRECT PISTON SET TO BE INSTALLED ON THESE eSP+ ENGINES:
● 125CC 4V eSP+ (STD BORE X STROKE= 53.5MM x 55.5MM):
● 150/160CC 4V eSP+ (STD BORE X STROKE= 60MM x 55.5MM):
SMART SHOPPER TIP:
※ BUYING MORE THAN 1 PIECE CUT THE TRANSPORT PRICE, AND YOU RECEIVE A 10% DISCOUNT ON TOP OF IT!
※ B2B:
All prices are in VND