Special Kit with Stainless Steel 27 mm Exhaust Valves (26 mm Standard)
Product Description
This kit solves the upper revs flat power curve in race motors: the more the engine can breath adding airbox, stacks, cams and all the usual add-ons, the more its power curve looks flat at top revs.
Cooking point is stock exhaust valves size: fitting those valves the un-choked engine will deliver an astonishing top end power.
The kit includes:
4x 27mm exhaust valves
4x Specific super-finished springs.
Who This Product is For
This valve kit fits any 21-24 RS and Tuono 660 but only with our 81mm RACING and82mm PISTApistons. Can’t fit stock pistons.
It’s a race product, it needs a proper assembly and valve clearance check.
Technical Details
Uses stock lower valve spring shim, upper collet and half-cones.
Valve seats’ throats and angles rework instruction supplied.
Dilone Racing Parts
