hi!

I want to fit a rear head front and was thinking if it would be a good idea to

skimm them a bit but how much for a spliced+mod airbox bike?Or else

(I have an R motor) if i install 2 rear sp/se heads then i will have the better spark location front + 0.2 shorter heads.

Is it a good idea for a derestricted bike without pipes which is for road use?

I want to tune the bike in the aspeq of the blueprinting.