Carb diaphram

vigevar · Post by **vigevar** » Fri Oct 14, 2016 1:01 pm

Just put some new needles in but now one of the slides takes twice as long to close as the others. The rubber looks in good condition but no matter how many times I put it back together, same thing, would it work as it should if it's on a running bike.

Any thoughts ?

While were on the subject of needles, which groove should the cir-clip be in ?
(needles from Stig)

Post by **nugget** » Fri Oct 14, 2016 1:49 pm

The slide you're having trouble with should close at the same speed as the other three. As for the cir clip groove. It goes on the middle one.

vigevar · Post by **vigevar** » Fri Oct 14, 2016 3:35 pm

Cheers Nugget. It should close at the same speed, but it doesn't. That's the problem.

Post by **Stig** » Fri Oct 14, 2016 8:16 pm

I have a spare set of carbs that I've been wrecking my head about whether to break for parts.....

So here's me making up my mind!

I'll sell you a slide and diaphragm if you want one or even a complete carb

YAMAEXUP · Post by **YAMAEXUP** » Fri Nov 04, 2016 4:01 pm

It sounds as though the slide has got dried petrol residue over the contact surfaces. I had this on my carbs & a quick clean with some carb cleaner & a tooth brush soon got things moving nicely again

When installing the slide & diaphragm, hold the slide up with one finger while seating the diaphragm into its groove. Only then seat the carb top down into place while still holding the slide up.
(also make sure that the small 'O' ring is in good condition)