will a 82 850 motor work in a 77 750 frame

[alstone89]

I think i will still buy the 82 motor and carbs .. if my first plan fails , will the head off the 82 bolt onto the 77 bottom end ?

[Coady]

Yes the cylinders and pistons and head off the 850 will bolt onto the 750 bottom end and then you can use the 850 carbs as well (as hampshirehog stated).

There is a question as to whether some grinding of the cases is required to accomodate the larger piston sleeves? I will be finding out the answer to this soon as my oil guzzling, plug fouling 750 is gonna be stripped down this week, with 850 cylinders ready to go!

[makenzie71]

You DO have to grind the sleeves...but it's small cheese.

[Coady]

You DO have to grind the sleeves...but it's small cheese.

So you can grind the sleeves without any risk of distortion? That sounds way better than the potential for muck to go in the case.

[gsryder]

Save yourself the time and agony sell the 750 engine still in the box take the money you were going to spend on the 850 and and buy a 1100 engine they bolt right in.

Drop that in your 750 frame and try not to smile to much.

Search 7/11 swap on the forum that should get you started.

[Coady]

Save yourself the time and agony sell the 750 engine still in the box take the money you were going to spend on the 850 and and buy a 1100 engine they bolt right in.

Drop that in your 750 frame and try not to smile to much.

Search 7/11 swap on the forum that should get you started.

I believe that's for 16 valve 750 not the 8.

Anyway, any thoughts on grinding the sleeves? Acceptable practice?

[tkent02]

I believe that's for 16 valve 750 not the 8.

True, so find a two valve GS 1000 engine.

[TheCafeKid]

True, so find a two valve GS 1000 engine.

I seem to remember that Blowerbike said that a 16v 1100 motor will fit in a 750 frame?? Or was it the 1000? Maybe he will jump in here...

[blowerbike]

1000 fits in 16v. frames with a left front mount swap i believe.
8v. 750 is by itself.
anything can be made to fit but not a simple bolt in.
just because the 750 and 1000 is an 8v. does not mean they interchange.

[blowerbike]

i also would like to add...
i thought the 80 and later 850 had a roller on top of the cam chain like a kawi.
the 750 8v. does not.
if this is true i'm not sure of the problems it would cause or if you just need to use the entire 850 head assy.
cam chain length/timing issues ect...
a 750 8v. engine should be able to be bought for 50 bucks and up.
why make things difficult

[TheCafeKid]

i also would like to add...
i thought the 80 and later 850 had a roller on top of the cam chain like a kawi.
the 750 8v. does not.
if this is true i'm not sure of the problems it would cause or if you just need to use the entire 850 head assy.
cam chain length/timing issues ect...
a 750 8v. engine should be able to be bought for 50 bucks and up.
why make things difficult

750 DOES have the roller gear over the cam chain.....

[Coady]

i also would like to add...
i thought the 80 and later 850 had a roller on top of the cam chain like a kawi.
the 750 8v. does not.
if this is true i'm not sure of the problems it would cause or if you just need to use the entire 850 head assy.
cam chain length/timing issues ect...
a 750 8v. engine should be able to be bought for 50 bucks and up.
why make things difficult

The 750 8v has the roller too. If this is the roller you mean:

[blowerbike]

does the 850 have the roller then...??
did i have it backwards..??
please pass the pipe

[blowerbike]

someone please verify if the 850 has the roller also.
here is the pipe back...T/Y

[Coady]

Yeah looks like 850 has roller too.