850g repower

[Guest]

Hi there, i am wondering if some one can help me. i currently have a 84 GS750G i love the bike but the motor is a little slow and tired, i need to carry 1 litre of oil a day for topping up, i have got my hands on a 78 850g motor i have been told is a good runner from a crashed bike, i believe it will bolt in but it has no carbys. do i need to change the jets in my 750 carbs or can i just leave them as they are and just bolt on? is there any other words of wisdom before i start this repower?
thanks heaps
craig

[Zero260]

Why wouldn't you rebuild your motor? There isn't that much power difference between the 2. And I believe you have a 16 valve motor. And the 850 would be 8 valve

[Steve]

It should be a do-able project, but I am wondering just where in the world you are.

As far as I know, only Japan had a 750G, and the rest of the world got the 850G as a '79 model.

.

[craigwood]

Why wouldn't you rebuild your motor? There isn't that much power difference between the 2. And I believe you have a 16 valve motor. And the 850 would be 8 valve

The main issue is cost. The toy budget just doesn't stretch that far. It is the original 2 valve motor so very similar to the 850

[craigwood]

Well spotted. I am in New Zealand, the bike is a Japan import it arrived in 1988 back then it was common to have speedo wound back before exporting, this may explain the tired motor at 70k. I am hoping it will be a simple transfer. No hurry though, a long as I carry oil the old motor keeps going