250cc 4 valve Grom Clone

[ProDigit]

I doubt a 300 will fit, but it might. Some YouTuber put a CBR300R engine on a Grom. So you never know.
Personally, I think the Sweet spot is between 175cc and 200cc.
You still get good fuel economy, especially if it's a higher compression engine, tuned well, but also a lot more torque and top speed than the 150.


I'm wondering if it was a plug and play, or did you need to weld any mounts?
From the space I see inside that bike, I probably would want a size smaller engine.

Originally Posted by warrenpeas

... what should the operating temp be?

Most engines run between 180 and 212F, this due to them being water cooled and 212F is the boiling Temperature of water.