Bandit 250 "runs out of fuel"

[vindy500]

took it apart today, vacuum diaphragm isnt sealed on one side but looks liek it would be sealed once the tap is screwed together.. would that make any dif? still goes in and out if you suck it. hose seems sweet. replaced the plugs when i was in there and it seems to run a bit nicer now. still did its whole running out of fuel to me today on the motorway though afterwards. at sustained high revs at about 140.(by motorway i mean private road) so its obviously not running perfect. oh and i replaced the o ring which had perished a bit in the fuel switch and put a new fuel filter in

[MSTRS:Me]

OK...you're on the right track here. That diaphragm sounds like it's still not right. Or the whole tap is dodgy. Once you are sure it is operating properly, if the running out at revs problem persists you may need to check/adjust your carby float levels...that sort of thing. Leave them alone for the moment tho.

[vindy500]

alright, how to establish if the taps ok? the only hing i can think of is replacing it but i dont really have a spare handy

[MSTRS:Me]

First check whether the diaphragm is a part. Sometimes with that sort of thing, all you can buy new is the whole thing.
If diaphragm is available, get a complete tap from a wrecker. Strip it completely and rebuild.
That way, you still have a spare tap that sort of works and, in theory, a perfect tap.

[vindy500]

today we stripped down the carbs, one of the slides was stuck, and a needle was loose. we fixed them and cleaned all the jets, now the bike doesn't die at high revs but it still wont accelerate much, cant get it above 120ish, and it still goes noisy when you accelerate at higher speeds, carb balance? valve clearance? fuel tap?

[rok-the-boat]

Clean the carbs, fuel lines, and tank. Make sure there is a filter. Set the float heights. If it's fuel related that should do it.

[Jantar]

The rubber used in the diaphrams of earlier model Suzukis was not compatible with our new fuels. I would suspect that the diaphram is perished and not opening all the way. You could replace the diaphram, but the same problem will re-occur in a few months. The best solution is to replace the entire fuel tap with either a more modern one, or (cheaper) simply leave the bike on prime and add a simple on/off fuel cock in the fuel line. The cheaper solution will leave you without a reserve position position.

[vindy500]

where would i get a more modern one from? can you get aftermarket ones? im not overly keen on having an on off switch, i can see that being a haslle when i forget to switch it etc