77' GS550 engine into '86 GS550ES frame?

[ChrisLaw]

Can this be done? Story is I have the chance to buy a '86 with second gear gone and a no start, no spark condition for dirt cheap. Will the engine from my '77 project bolt into the '86 frame? Visually they look to be the same engine but I'd like to clarify.

[Nessism]

Engines are totally different and to my eye at least, don’t look the same. You might be able to get the engine to fit, but by the time it’s all said and done, I think you'll have more effort into doing the transplant than you would just fixing the current engine.

[hampshirehog]

Can be done no doubt but would be loads of mucking about - they aren't the same motor by a long shot. Way easier to rebuild the gearbox and work out where the wiring problem lies

[ChrisLaw]

Well, to my untrained eye they looked similar...

It was a long shot I guess.

Would you happen to know if the engine would still bolt in the same spots because thats all that really matters. I'm talking about transferring everything (including my new custom harness) from my '77 to this bike. At least until I could rebuild the original gearbox and figure out the electrical issues.

[Nessism]

Well, to my untrained eye they looked similar...

It was a long shot I guess.

Would you happen to know if the engine would still bolt in the same spots because thats all that really matters. I'm talking about transferring everything (including my new custom harness) from my '77 to this bike. At least until I could rebuild the original gearbox and figure out the electrical issues.

It's a substantially different engine so it's almost certain the bolt pattern is different.

[ChrisLaw]

Damn, OK, thanks anyways. You guys are so helpful!