81 GS450 Engine rebuild

[whig-it]

I own a 1981 GS450S. I got it running a few months ago, got about 100 miles on it and the motor died. What happened was i was ridinr, lost all power and now it doesn't stary and makes a weird bottem end noise. Jusding by the noise, neither rod is broken, and i have no clue what happened. The timing chain is fine, and it gets spark.

Now my question is where can i find parts to rebuild the motor. I have found a full gasket set, but that's about it. Also is there anyone that makes uprgade parts, like big bor kits, or pistons, ect. thanks for any help

[SqDancerLynn1]

If you want to do it I would look for a later GS500 motor & do a transplant

[whig-it]

I think that's what i will do. I was looking @ that a while ago before the motor went. Is there any piston kits for the 500 to raise the c/r?

Also where can i find 450 parts, i woudl still like tot rebuild the motor for a go-kart or something. thanks

[Nessism]

Ebay is your best bet. 450's were made for a lot of years so there is a pretty good supply of used parts.