What engines would fit in my frame

[Oscar3324]

I own a Kawasaki ksr 50 and am looking to give it a power boost, after finding out a cylinder and piston kit from a ksr 80 will not work with the crankcase I am thinking towards doing an engine swap as the mounts look similar on other Kawasaki bikes, if anyone could give me a bit of advice on if a KX80 or KX60 engine would fit in the frame and if not those then if any other engine would fit, it would be much appreciated, thank you

[Tinkicker]

Just buy a bigger bike...

[Hairsy]

Best advice you’ll get. And if you want it to be a project then buy a bigger bike that’s been unloved. 

Edited September 4, 2024 by Hairsy

[bud]

Most 50 and 80cc bikes share a similar engine base. It shouldn't be too  difficult to bore out the cases to take the 80cc cylinder. If you really wanted. It depends on how much of a project you want.

It looks like the KSR used a variety of engines. Liquid cooled, air cooled, and even a four stroke. The four stroke would be the easy option as loads of different displacement available.

There are quite a few gag bikes that are 80cc. It would make more sense just to buy one if you need more power.

Edited September 14, 2024 by bud