Hi, I posted a few days back and I have now purchased an sr185. Can I put a 400 or 500cc engine in it? What will have to be changed/modified to do this?

Thanks!

Brad

1st of all........ to the forum Merkin

More than likely, you'll have to modify the engine mounts....as the lower half of the 185 motor will be shorter in length than a 400/500 lump.

The top mount could possibly be used as is.......most YamaThumps have a mounting point on top of the valve cover.

Countershaft sprocket offset could also come into play here as well.

Just use a tape measure, pen & paper @ 1st.......& measure EVERYTHING.

Thanks Yamahead! Looks like it shouldn't be too hard, I'll find an sr500 engine/frame and start measuring.

Now anyone in Melbourne know where I can get an sr500 engine cheap?

Brad