Currency Displayed in
Below are the available bulk discount rates for each individual item when you purchase a certain amount
● YUMINASHI STAINLESS STEEL VALVES SET, 31/24.8MM 79MM HEIGHT (150-HEAD CUSTOM PART)
● Custom stainless steel valves set to replace the stock 29/23mm valves, and upgrade them in to 31/24.8mm valves.
● The maximum bore size to be used with the stock 29/23mm valves from the 150 head is 60mm.
Anything larger than 60mm starts to have a negative effect on your tune, the 62mm piston creates less power than the 60mm piston, and that's only because the stock valves size can't deal with it.
● With the 31/24.8mm valves set you have the possibility to get this right.
The intake valve has a 4.5mm valve stem to make the valve lighter and to ensure maximum flow, the height of the valve is 79mm and this is the perfect valve height for the 150 head.
Keep in mind that the exhaust valve isn't stainless, and has a 5mm valve stem to get easier rid of the heat.
The height of the exhaust valve is also 79mm and this is also the perfect height to be used in the 150 head.
● THESE 31/24.8MM STAINLESS VALVES ARE CUSTOM VALVES TO MACHINE THE 150 HEADS TO BE INSTALLED ON:
HONDA:
※ These valves can not be installed in the stock 150 head without machining. You need to install larger valve seats, a custom 4.5mm intake valve guide (LINK), and your machine shop need to machine the stock 150 head to accept all these non original parts.
The final result will depend on how experienced the machine shop of your choice is.
Masato Co., Ltd and the Yuminashi brand are not responsible for the final result of your machine shop.
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 RUB