healter skelter
Extreme
I am running the heavy springs for higher boost and now the intake valves are cupped, has any one run into this. Is there a better valve that guys are using now
ultimate
Extreme
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how much boost do you speak?
healter skelter
Extreme
I was running 19 lbs, plan on running more though
ultimate
Extreme
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- Yamaha apex
so,you can run easily with stock springs valves!
good about 380hp...........!
good about 380hp...........!
TWIN TURBO
Expert
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Stock Apex valve springs that is! 
gsxr
TY 4 Stroke Master
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- 2023 SRX
Heavy valve springs will not tulip valves
BUT
TOOOOO MUCH COMBUSTION TEMP WILL !
heavier springs are only needed for extra RPM !
BUT
TOOOOO MUCH COMBUSTION TEMP WILL !
heavier springs are only needed for extra RPM !
