Query Approved.

Hello Pia, welcome to xBhp first of all. Nice to see someone (a girl on top of that!) all the way from Germany riding the R125! It would be lovely if you could perhaps tell us more about your experiences with that specific machines. I am sure, like me, many would absolutely love to read about it.

As for your query, there are MANY who ride an R15 in this forum. I am sure help is just around the corner.

Welcome Pia to Xbhp. We all admire the R125 for its rev happy engine, big size and other reasons... Do post an introduction in "Who are you?" Section...

From what I know, R125 and R15 are bikes with different overall nature. I mean, in terms of power delivery, maximum power spot & torque curve.

Rather than getting the R15 parts into your bike, I would suggest re-boring and long stroking your existing cylinder & Piston Setup...

Also, I would recommend that you use this site to send a Private Message to "Joel". This person is a true R15 genius, and he has various achievements - Reboring R15 to 165cc, Modifying R15 to make it fastest Street Legal R15, etc... He is more of a "helpful Genius"!