SR 250 engine in SR 125

[-lw-]

Hi, has somebody expierience with building a yamaha sr 250 engine in the sr 125?

Does somebody now wether it works, because at the sr 125 the exhaust comes out of the engine at the left side and at sr 250 it comes out of the engine at the right side.

:DSorry for my bad english

leon

[fosdyke]

Hi, has somebody expierience with building a yamaha sr 250 engine in the sr 125?

Does somebody now wether it works, because at the sr 125 the exhaust comes out of the engine at the left side and at sr 250 it comes out of the engine at the right side.

:DSorry for my bad english

leon

Hi - and don't worry about your english it's far better than my German!!

If the frame is the same then there is no reason why you couldn't (with a bit of modification) fit the bigger engine......BUT and here's the 'rub' - You may well have to uprate both the brakes and the forks and use a carb and pipes which suit the 250cc engine, all of which might make the project not worth it in the long run - but someone with more experience of this type of conversion could put you straight.

Let us know what you decide.

[-lw-]

The problem is solved: I´m not going to build the bigger engine in because i would have to weld the frame, and it`s not worth to drive without drievrslicense.

Leon