Slabby carb help please!

[db]

I bought a set of carbs described as 'Slabside 34mm Mikunis'.

The motor side i.d. is 34 but the narrowest bit of the venturi is 29mm.

So... are they 29mm or 34mm carbs?

[Moe]

They certainly look like VM29 carbs off the early 750 slabsides ,they were 29mm but they can be bored out to 33mm if I remember correctly. 

Edited November 29, 2015 by Moe

[db]

That makes sense Moe, thanks. So I was 'ad when I bought them :-(

[Moe]

That makes sense Moe, thanks. So I was 'ad when I bought them :-(

It all depends on how much you paid for them They are quite sought after nowadays , so I wouldn't think you would have any trouble selling them .

What bike were you going to put them on ? They may still be ok for you .

[Guest YoshiJohnny]

Sam Baker can bore them out...it's only the airbox face plate that needs opening up...

Canamant will tell you the best way to do it (there's 2 ways)

once opened up they are brill....but make sure there is nothing worn and get fresh seals.. they are 30 years old and will leak/not work properly if not looked after.

generally sell for £150 ish whatever condition they are in VM29s

bored out and A1 they go for a bit more but you still gotta strip and check them

I use them on an 1127 motor and they are great..give good torque but not as good as 40s for top end

[db]

I paid £150 so hopefully I'll still get that back then, cheers!

I've a Harris with a GS1085 lump. (It did have a thread on the old site, I'll start a new one when I get chance)

The motor is with Roger Upperton for a rebuild, as recommended on here thanks!!  I'm hoping to get it back on the road for next summer after a 15 year 'rest'

It has Wisecos, Yoshi cams, shim-under-buckets, etc. The old head was 8-plug but the motor ate itself so Roger's fettling a replacement stock head, he reckons 120hp at the wheel :-)

I had 33mm smoothbores on it originally but 'lost' them during a house move! They'll turn up one day...

I bought the Slabby carbs as a cheaper replacement, but I have a set of smoothbores on the way, which Roger says will be better suited to the motor.

[Moe]

All is not lost then , throw them on Eblag and you might get a bit more back. I had my GSX 11 engine done by Roger , still haven't got round to building it back up  

I'm after some 33mm smoothbores , so if your old ones ever turn up , give me a shout