gonna do engine rebuild , need advise

what mods to add? i was thinking wilco pistons ...what else can be done? oh, 99 r1:) thanx.

run a search on martinc use his borg-o-rama website. your fantasies await you.

try checking out falicon crankshaft components they do crankshaft modifications ,they will lighten your crank and knife edge the flywheels for less drag ,it'll spool up rpm's faster and quicker down shifts they will also stroke your crank if you want to give you more displacement they have a few different stroke lenghts to choose from or they make you a custom stroke if you want.,they also sell billet connecting rods, stronger and more streamlined ,and clutch basket mods ,recommended with stroker kit . you could also put hi-performance cams yamaha sells them ,also graves motorsports ,kent cams ,adjustable cam shaft sprockets recommended with cams.cylinder head porting also hepfull with cams. ignition advancer good for a few horse .pistons JE pistons ,forged higher compression hope this helps

when i looked at the prices of all that , i dont know if its worth the hustle... if i'll change the pistons to wiseco i'll need to change the valves too right? and then the rods.... all that will sum up to 3K $ , and what will i get? 10 hp more?:sing:

I'd suggest a look at these two threads mate: http://www.r1-forum.com/forums/showthread.php?t=182384 http://www.r1-forum.com/forums/showthread.php?t=185329 :thumbup

just done my motor not worth do the piston unless you change the cams(expensive) I removed the centre piece from the head gasket and ported the head fitted a jet kit and full system with nice results reliable, strong and quite cheap