GS1100 4 valve motor in a GS1000 2 valve frame

[Big Jay]

I know this mod is done quite regularly, but has anyone here actually done it? and what all is involves as far as mounts go?

Jay

[rapidray]

Jay it is a bolt in. The only issue is with the 2 triangle mounts under the motor on each side & we have run without them without issue. What are you up to? Ray.

[hampshirehog]

As Ray says they pop straight in and everything lines up except those little triangular jobbies. Even the rear spacer fits perfectly. It's the same engine really.....

Petrol tank is very tight though.

Just have an extra Shredded Wheat before lifting the bugger in.

[Flying Fish]

As Ray says they pop straight in and everything lines up except those little triangular jobbies. Even the rear spacer fits perfectly. It's the same engine really.....

Petrol tank is very tight though.

Just have an extra Shredded Wheat before lifting the bugger in.

So what we know as the gsx1100 in this country is a straight engine swap for the gs1000?

[7981GS]

This welded mount on the frame, has to go or you could weld a similar one spaced slightly outside of the frame.
I chose to remove it for now as I have another engine swap bike that has been running for over 16 years
that doesn't use either of these frame mounts with no ill effects.






Daniel