77 gs 750 jug swap to 850

[Smitty86]

so i just got done with my 80 gs 750 build now im on to the 77 gs 750 its going on a hard tail frame and im tryin to make it wiked fast lol so ive heards about this jug swap but not in detail thoghts and opinions appriciated

[Nessism]

Sorry to be "that guy," but if you search out info here, you will find more than you care to read about regarding this swap in older threads.

[unfocused]

The jugs will fit however the machining (lack of) on the bottom of the jugs might interfer with the 750 cases. So some relief might be needed here. This has been noted multiple times with other builds. Some fit fine, some don't.
Some say swap in the 850 cylinder head as well but keep the 750 cams.

The early model GS750's use the 3 bolt timing chain tensioner - nothing after-market available. worthless ugh.
Some GS850's use the 2 bolt like the GS1000 - plenty of after-market support here.

exhaust and carbs swap from gs750-gs1000 - 8V engines.

I have a '77 GS750B - bored to an 844 - 4mm over - runs great, sounds awesome - not finished.
I have a '77 GS750B - GS1000 engine installed - was running/riding but switched it up and now it's in pieces waiting for me to finish the above...

[slayer61]

Search 7/11. You'll thank me later.

[Smitty86]

After hours on the web and everything I decided to go a different route Im putting the 750 on the stand for something cool next year and putting a Yamaha R6 600 in I already have the rear sub frame installed looks kinda rad lol now I have to fix a lazy mistake of mine and weld this hole shut in my gas tank wish me luck thanks for the responses and pointers