Spark plugs keep going black

[El Dopa]

after a long ride I get home turn the bike off then put helmet etc inside then go back outside turn the bike on & ride it into the shed. The next morning I get up try to start the bike but it's hard to start & when it does start it keeps stalling. once going has absolutely no power at all very slow acclelaration & bad sound aswell. This seems to be a comon problem with the bike. Any ideas?

With my very limited knowledge, it sounds to me like your engine is running way too rich.

This is a carb problem, and is caused either by the carbs being wrongly adjusted, or the needles/jets in the carb assembly wearing out.

You mentioned the bike is in the shop already? Get them to pull the carbs off and either:

1) If the carb parts are still good, adjust them so that the bike runs leaner (tell them you think it is running too rich).

2) If the carb needles/jets are knackered, get them replaced.

[bimotabob]

Hi

Make sure you get the coils and leads checked though, even if its not the main prob GSXR's often have coil problems. Many have dyna coils.

A mate of mine added a dynojet kit to his 93 model with 40mm carbs,
goes way better - wheelies all the time. You would need to ditch the restrictive mufflers to get the full potential like him though and your fuel consumpion would drop from 16-17km/l down to 12-13.

Cheers
BB

[knight rider]

Hi

Make sure you get the coils and leads checked though, even if its not the main prob GSXR's often have coil problems. Many have dyna coils.

A mate of mine added a dynojet kit to his 93 model with 40mm carbs,
goes way better - wheelies all the time. You would need to ditch the restrictive mufflers to get the full potential like him though and your fuel consumpion would drop from 16-17km/l down to 12-13.

Cheers
BB

hmmm wheelies I like the sound of that

[knight rider]

With my very limited knowledge, it sounds to me like your engine is running way too rich.

This is a carb problem, and is caused either by the carbs being wrongly adjusted, or the needles/jets in the carb assembly wearing out.

You mentioned the bike is in the shop already? Get them to pull the carbs off and either:

1) If the carb parts are still good, adjust them so that the bike runs leaner (tell them you think it is running too rich).

2) If the carb needles/jets are knackered, get them replaced.

just rang bike shop & he said it sounds like a black box problem or maybe the coils. So sounds like he's on the right track. It's at Richards motorcycles in Johnsonville Wellington. Richards pretty onit but you have to catch him in a good mood as he can seem stressed out & rushed off his feet sometimes. Anyone else deal with Richard?

[knight rider]

latest news. it's running on 1 1/2 cylinders..... WTF? what causes this to happen?

[nadroj]

latest news. it's running on 1 1/2 cylinders..... WTF? what causes this to happen?

Dirty plugs!

[knight rider]

Dirty plugs!

lol true but what causes them to go dirty after only being replaced about 200kms ago?

[Robert Taylor]

Worn carburetors or as other contributors have reasonably surmised an ignition problem i.e not enough spark to light the fire properly.......get both checked by a qualified experienced motorcycle engineer.

[F5 Dave]

Been through all this on the RF900, do a search on this site. I made some replacement parts for when the emulsion tubes wear. Check the factorypro.com. website to see what a tube is & how it wears (oval hole). Hard to see by eye, need good light. If it is visible it is way too worn.

All pretty simple to take apart. Yes GSXRs do have dodgy coils, but I bet emulsion tubes 10:1

& yes this can take an age to sort out if you keep getting sidetracked by high resistance plug caps & other 'this is it' red herrings.

[Sensei]

You still got the 40mm carbs of the old motor on the 96 motor ?? if so they will be well worn by now as Robert replaced the original ones for soft Dynojet kit so thats where I'd start , plus replaced 3 coils on that bike when I had it .

[knight rider]

You still got the 40mm carbs of the old motor on the 96 motor ?? if so they will be well worn by now as Robert replaced the original ones for soft Dynojet kit so thats where I'd start , plus replaced 3 coils on that bike when I had it .

not sure what carbs are onit. heard the coils can be a bugger too. Got it back though something about the revs being too high he put a spring in the choke as it was sticking sounds alot better & feels so smooth through the whole rev range. Has #7 spark plugs init now too. adjusted the carbs it sounds so much better & feels so much better. Time will tell if it's fixed the problem

[knight rider]

You still got the 40mm carbs of the old motor on the 96 motor ?? if so they will be well worn by now as Robert replaced the original ones for soft Dynojet kit so thats where I'd start , plus replaced 3 coils on that bike when I had it .

are dyno jet kits good ones?

[Sensei]

Not really they are good for a short time then they start to wear out as they are quite soft ally needles etc . I think I still may have the old original ones here somewhere will look for ya & if so will give you them to put in .

[knight rider]

Not really they are good for a short time then they start to wear out as they are quite soft ally needles etc . I think I still may have the old original ones here somewhere will look for ya & if so will give you them to put in .

that would be gret. thank you so much

[knight rider]

rode it today & when the revs are down low it kinds feels like the power comes on & off. I still haven't got the exhaust gaskets done caould this be causing the problem? when I back off the throttle at high revs it make like a popping sound