ive been cleaning my carbs tonite and installing the dyno jet kit all is going weel apart from one thing

how can i get the diaphram to sit in its grooves so that ican then install the spring and the top black cover.

ive fitted one up but i cant really see if the rubber diaphram sits correctly
thamks
simon

as long as the diaphram is not holed, it will go back in fine.

mine always look a bit saggy but if you take your time and tighten the screws gradually it will pull down fine...

go for it..

Paul.

There's no "special" way of doing it, it should stay in its groove fairly well with the slide in the down position, before you fit the cap and spring. I suppose you could use the lightest smear of gasket sealer to glue it in place, but it shouldn't be needed

Simon
I always turn the diaphragm inside out so the slide sits high, locate the bead in the groove, lightly install spring then push the slide down, install needle retainer and the push the cap on. To check the seal lift the slide with finger pressure and release it should return with quickly smoothly and with an audible sucking noise.
Hope that helps
Andy

Hi, I thought it was hard too until I worked it out.

You need to hold the slide up and fit the diaphragm ‘inside out’ so it’s sticking up and out of its normal position. This means the seal is now sitting into its groove. Then fit the needle. Now you have to put your finger into the inlet of the carb/throttle body (where the main air flow enters so you have to take the air filter off) so that when you put the spring in it can’t push the slider, needle or diaphragm down. Then fit the top of the carb and push it down to compress the spring and as you do this lower the slide with your finger inside the carb. Screw it up and all is good.

Doing it the other way might mean it doesn’t seal or you crush the diaphragms edge if it doesn’t seat right.

I haven’t described it very well, but what I am trying to say is turn the diaphragm inside out. Hold it up from inside the carb, fit spring and top, last let go of slider inside the carb so it drops down.

many thanks for all the replys ive just finished putting the carbs back together will be putting them on the car tomorrow

cheers
simon