roduct Description
● The high-lift Yuminashi SX290 8.2 camshaft really makes a difference because the Yuminashi R&D have not only increased the valve timing degrees, but also the intake and exhaust lift, and with a intake valve lift of 8.2mm is the Yuminashi SX290 8.2 camshaft the only camshafts on the market for MSX/GROM125 which exceeds the maximum possible intake valve lift of 7.1mm for a stock MSX/GROM125 cylinder head.
To be able to get such a high lift in the stock MSX/GROM125 head the Yuminashi R&D had to develop special valves to make this higher lift possible without ramming the valve retainers against the valve guides and valve seals.
Because of this, the special High-Lift valves come together with the high lift camshaft as one set.
Customers who want to drive with the Yuminashi PGMA-FI Stand-Alone ECU in the open Racing mode we recommend to use our Progressive Double Valve Springs set.
● All Yuminashi camshafts come standard with high-speed NACHI JAPAN C3 bearings to meet our standards concerning durability and reliability.
The tip from both valves are heat treated and cooled down in a controlled way to improve the strenght.
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This set needs to be installed together with the special high lift valve retainers and valve cotters to avoid contact between your rocker and the retainer.
If you don't have the special high lift retainers and valve cotters set, then you can click here to view and order.