Bore bike engine?

[aramiK]

Yamaha 125r, is it possible to bore it out?

11kw. weak

[EuroAccord13]

Yes you can, there are 150cc kits for the bike.

Have a browse - http://www.yamahar125.com/forum/

[hisoka]

when did this come out ? the bike lol.

[Zilli]

wow, i wonder how much gained hp it nets

[Twincam16]

prob not enough to justify the price it would be to do it

remembering that its a learner specific bike.