Offset sprocket not possible with gs750/850??

[gorbys]

So today was gonna be the day I got to test my new build, just had to refit the sprocket and clutch release cover and refit carbs. But no. The new sprocket and chain fouls the cover, there isn't enough room for an offset chain and sprocket. 

I'm running a 15mm offset sprocket. 

So is it not possible or do you modify the cover by cutting out the clutch release portion of the cover and rewelding it further outwards or what? Pictures would be nice

[Blubber]

I am unfamiliair with this type of sprocket cover but on my gsx 1100  i had to remove some of the webbing and padding to fit a offset front sprocket.

Sadly no pictures .

Lets see pictures of your situation... might boost the collective hive mind 

[vizman]

I usually just flappy wheel down the webs a bit......

.....obviously after the chain has tried to do it first...(every time)

[gorbys]

So as you can see from the part picture, the cover is not just a cover, it also holds the clutch release mechanism (which is on the right side on the gs/gsx-1xxx and therefore of no concern on that engine) inside the little cover. 

That part overlaps the sprocket, with little clearance, so if you move the sprocket and chain outwards, it will foul on that part of the casing. So in my case there's aprox 15-16mm clearance between the cover and the engine casing it's supposed to sit flush with. 

Red is the casing for  the clutch release and green is sprocket. 

[Mouse]

Hi

I am looking to do the same with my 78 GS750 and have found the same problem, one of my thoughts at the moment is to have a ally extension piece made to space out the cover and then use a longer pushrod.

Can i ask what swingarm and wheel are you using to need a 15mm offset ??

  Mouse.

[gorbys]

25 minutes ago, Mouse said:

Hi

I am looking to do the same with my 78 GS750 and have found the same problem, one of my thoughts at the moment is to have a ally extension piece made to space out the cover and then use a longer pushrod.

Can i ask what swingarm and wheel are you using to need a 15mm offset ??

  Mouse.

That's certainly an option but check that your gear selector rod is also long enough for you to do that.

Bandit 1200 swingarm and 5.5J wheel

I'm not gonna do anything more about this as I have an 1100 engine sitting in storage that's going in but It would be nice to see if someone else had solved this

[ITSshaBOY]

Can we get this alive again? Anyone fix it? 

[gorbys]

On 2/1/2024 at 9:17 PM, ITSshaBOY said:

Can we get this alive again? Anyone fix it? 

Yes i fixed it by replacing the 750 engine with a gsx1100 engine 

[Reinhoud]

Can't you make the clutch control hydraulic?

[ITSshaBOY]

10 hours ago, gorbys said:

Yes i fixed it by replacing the 750 engine with a gsx1100 engine 

lol I’ll keep that solution in my back pocket

[Toecutter]

Machined Spacer plates made to solve this issue at Fastec racing.

[Duckndive]

What about getting a good fabricator to morff a 850 or 1000 clutch mechanism onto a 750 cover    

[Toecutter]

Spacer plate. 6mm thick for 10mm offset sprocket. Thicker plate for wider offset sprocket needed. Longer push rod also required to allow for extra room in this case 6mm. 

[Toecutter]

Also fits the gs1000 but needs a small section removing to allow upper, rear engine mount to clear. 

Edited March 6 by Toecutter
Predictive text ramblings

[Swiss Toni]

15 hours ago, Toecutter said:

Spacer plate. 6mm thick for 10mm offset sprocket. Thicker plate for wider offset sprocket needed. Longer push rod also required to allow for extra room in this case 6mm. 

And gear change shaft easy to extend, if needed. 

[Toecutter]

Yeah, with 6mm spacer for 10mm offset sprocket there's plently left for the gearchange shaft. Any wider on the offset would need the shaft extending.