1996 bandit 600 mystery problem

[Guilby94]

I have recently acquired a bandit 600 1996 but the problem the old owner was having was that every few weeks the bike would stop working because the plugs were fouled but after a clean it would run again. Anyway I spoke to him and he says he checked the plugs but there was a weak spark on all 4 but he also says he has changed the chi unit and checked the coils but I have spoken to two mechanics and neither have a clue does anyone have any experience?

[yen_powell]

Assuming carbs, is the choke stuck on or is he riding with it on?
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[Guilby94]

Nope he never rode with the choke on but I have been told it could be using too much fuel and not burning enough because of the weak spark sounds plausible to me

[yen_powell]

[Guilby94]

Sort of an oily mess

[Guilby94]

It really has me confused

[Taught2BCauti...]

Try doing a compression test, and check the spark plug gaps.
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[Guilby94]

Ok will have a chat with the mechanic who has it now and will keep everyone updated

[sickpup]

I would clean up all the earths on the coils, trim back the HT leads and change the air filter.
If that doesn't work I would check for a badly fitted Dyno-Jet kit.
Also does it have the standard can on it?

[Val]

Have you checked for rotten/dirty contacts in the multi-plug both the coils and the ignition unit side?

Try Halfords electrical contacts cleaner on both then try with spark plug tester

https://www.ebay.co.uk/itm/like/261571595007?limghlpsr=true&hlpv=2&ops=true&viphx=1&hlpht=true&lpid=108&chn=ps&device=c&adtype=pla&crdt=0&ff3=1&ff11=ICEP3.0.0-L&ff12=67&ff13=80&ff14=108&ff19=0
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[Guilby94]

I am gonna check tomorrow all of these things and it has an ART end can on it and the carbs have already been balanced by the Suzuki dealer over here in Guernsey but I will definitely try and test everything

[sickpup]

[Guilby94]

Apparently so but I have ordered the spark plug tester in the link above and will check the jetting and the earths when I get some time

[sickpup]

[Guilby94]

Just spoken to the mechanic who says it is a carb issue and that they have done a compression test and nothing is wrong and he said they have checked the spark plug gaps and other bits like the earths on the frame where it has been painted and ruled out the ignition system he reckons it is a poorly fitted jet kit or a problem with one of the actual carbs so does anyone know if gsxr 600 carbs will fit?

[chris-red]

[Iain.]

Stupid question, have you changed the plugs rather than cleaned them?

My Bandit fouled the plugs, refused to start. Clean plugs it'd run for a bit then foul up again. Bought new plugs, fired up and ran perfectly for the entire time I owned the bike.

[Guilby94]

Will have to rebuild them and the previous owner changed them when he first started getting this problem will probably try a new set soon

[chris-red]

[Guilby94]

Unfortunately I don't have the original parts

[MCN.]

[quote="chris-red"]

[misscrabstick]

Bits do wear out, i just had to order a set of needles and seats for my kawasaki as one carbs getting a bit floody when it's left standing, I blame stupid ethanol for eating the tips of the needles.

[Guilby94]

Where would everybody recommend getting the parts from?

[Iain.]

[chris-red]