'80 1000 head on '78 1000

[Anonymous]

So I got lucky and scored a rough but complete '80 GS1000 for $400. And since I've been having the same old 26mm carb jetting problems with the modified motor, I thought the bigger intake ports and carbs might do the trick.
Eventually,(read as "When I have more cash" or "When I can get it by the Mrs."), I will be going to a 36mm flat slide carb setup. In the mean time, will the 33mm CV's work and does anyone have any jetting suggestions?

The motor is at stock displacement (for now),has a welded crank, upgraded cams (I can't find the spec sheet, but not real radical), individual K&N's, V&H megaphone exhaust, and Dyna coils and ignition. The head will be ported and maybe I'll have bigger valves installed.

I'm sure someone's been down this road before and I would appreciate any help.

Steve

[simon lambert]

Swapping the head should not pose any problems.
I have done this numerous times to 79/80 models.
Try to keep an eye on the cams you use though. I have
never mixed 79 cams on 80 heads..
For us here in Australia the GS1000G has the head that works best.
The same head but with slide carbs was fitted to the 80 model GS1000s,
as opposed to the 79 model 1000s which had the smaller ports and carbs.

If you do go wild on the cams remember to relieve the valve cover or the cam lobes will do it for you..
I do have the lift and duration of yoshi cams if you want to regrind..

Regards Simon