Help needed! Carbs on '85 slabby. VM29SS and RS36 issues

[Nik]

Hi all, I need your experience and input.

Background:

I have an '85 slabby with an engine from an '89 teapot. I dont have the original teapot carbs, and I planned on fitting the original slabby VM29SS carbs. After trying the VM29SS carbs, the inlet rubbers are not sealing properly. The outer diameter of the VM29SS is 40 mm and the teapot should have carbs with 42 mm diameter. The inlet rubbers are fine, but a bit hard and probably not as flexible as they once were. I don't want to damage the inlet rubbers by over tightening them, so I thought I'd fit a set of RS36 instead (42 mm outer diameter), but then I ran into clearance issues with the alternator. One of the RS 36 carbs's drain plugs hits the top of the engine block/alternator.

Help needed:

1) Do you guys know of a way to seal smaller carbs to larger inlet rubbers? O-rings? Vulcanising tape? Note that it is only for a very short time. I am just getting the bike MOT'd for the last time, so it has to last a weeks or two. 

2) Any trick to solve the alternator clearance problem?

3) Other suggestions or ideas?

I appreciate all input. 

Edited Monday at 08:54 AM by Nik
Typo

[spiderpig]

Have seen people machine down the case where the alt bolts for carb clearance before. Think that was for FCRs tho 

[Dezza]

Could you borrow some slabby (or powerscreen) carb rubbers to mount the slabby carbs . I think the 750 and 1100 slabby, and the 1100 powerscreen, all use the same rubbers, which accommodate the BST34s of the 1100 slabby and 1100 powerscreen.

[Nik]

24 minutes ago, Dezza said:

Could you borrow some slabby (or powerscreen) carb rubbers to mount the slabby carbs . I think the 750 and 1100 slabby, and the 1100 powerscreen, all use the same rubbers, which accommodate the BST34s of the 1100 slabby and 1100 powerscreen.

Yeah, I have loads of engines, to I have inlet rubbers to spare, but I thought the DOT heads had different inlet rubbers and they couldn't be mixed. I checked the DOT heads, and they all seem to use 42 mm carbs. Of course, I should have tried it though. I will try it asap. Thanks for your input!

Edited Monday at 09:56 AM by Nik