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sr400/500 engine in sr185 frame - possible


Merkin
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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

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1st of all........ :welcome: 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. :unsure:

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

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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

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