Fasstek Yamaha Valve Spring Seat Risers

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Fasstek Seat lifters for Yamaha V1, V2 and V3 valve springs that will allow you to adjust the height or the stress on your springs.
If you hear a loud ringing when you have your engine at a certain engine speed, most of the time it is because your springs are too short and are bouncing because they do not have the correct preload in support. With seat boosters you can completely correct this problem!

LAB Fast125 Tip:
We advise you to put the Fasstek Titanium cups
Calculate the height of the booster you will need according to your camshaft and spring.

Please look at the vehicle table below, in order to see the possible fitment.

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