arit Posted April 10, 2020 Posted April 10, 2020 (edited) anyone have a diagram or can outline how the vacuum setup from the tank works 1985 gsxr750 with factory vm29's Has 3 hoses from fuel tank 1 gas + 2 others one from fuel gauge sender and another under the tank, where do they link up to? cheers Edited April 10, 2020 by arit incorrect info Quote
banoffee Posted April 10, 2020 Posted April 10, 2020 There’s no vacuum pipe needed for the stock carbs. So, you’ve identified the fuel pipe and the level sender wire. Third one the tank overflow? Quote
arit Posted April 10, 2020 Author Posted April 10, 2020 thx mate, its leaning out a lot so was thinking a vacuum leak. Have to wind the mixtures screws out 4 turns for it to idle nice and its hesitates when it hits about 7000rpms then starts to clear and climbs up to redline Quote
Gixer1460 Posted April 10, 2020 Posted April 10, 2020 Still could be a vacuum leak via the inlet rubbers? 4 turns on the mix screws would usually point toward next size required. 7k would be top end of the needle / onto the main jet although if the revs climb then the Mj can't be hugely out but without a wideband its guesswork! Quote
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