I have a 99 r6 which is running like a pig (struggles to ideal over on the choke). I've change coil packs and also checked the spark plugs (but these had only done about 100 miles anyway.
looking around the net, it seems it could be a case that the carbs need cleaning and balancing.
I somewhat mechanically minded - but not massively.
Is this a difficult job or require and special tools? In short should I do it or should I get a workshop to do it?
Is the problem only when the choke is on?
Has the problem appeared suddenly or over time?
When was the air filter last cleaned or changed?
How does the bike run off choke?
Cleaning the carbs is pretty straight forward, the main thing is to be careful when cleaning the jets as they are brass. A good carb cleaner and use the manual to get settings for float height and mixture screw.
If you can keep the carbs together it saves time and lost screws
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is been sat for about 2 years (bought a house!!). but before that it seem to run fine.
it sounds like it's missing a cylinder and is really lumpy. Almost sounds like a twin. The plugs appear to be sparking though, so I think I can rule out the plugs and i've tried a different set of coil packs.
What do they need to be cleaned with?.
Clean with carb cleaner and an old tooth brush.
After 2 years the carbs will need a good clean as the petrol will be rank, it's also possible that the float plungers will be stuck, which is prob why it's missing. Change the fuel in the tank as well. New filter and clean out the fuel pump.
cool thanks guys! I going to attempt to take off the carbs this evening.
Do you think, I'll need to replace the rubber gaskets and seals when I'm cleaning the carbs ? I read through the Haynes manual and as always, it's say replace this that and the other, but does it normally need it?
He hasn't said if it runs ok off the choke.
What if there is a fuel supply problem due to clogged fuel filter or fuel line?
All of the above is sound advice but I'd be tempted to keep it simple at first.
As aslready said, drain tank and shove some new fuel in there, then check the fuel filter (it's easy to remove when tank is drained etc) and check the fuel supply line out of the tank to the filter, then the line from the filter to the pump, and then the line from the pumo going over to the carbs. You;re looking for blockages AND kinks or perished rubber.
If that all checks out (it' only take about 30 mins and is dead easy) then I'd then sigh and start dissassembling the carb body, after I had a fag and mug of tea
I could the plunge in the end and took off the carbs and cleaned them myself. (Actually not as diffucult as I first thought). Although it took some time to take them off the bike and put back in!!
One of the jets was completely blocked! so after a good clean in carb cleaner and some pressurised air I stuck the carbs back on and it now start straight off the button, with just a little choke and runs sweet as a nut now.
reading the other comments though, where is the fuel pump (is it under the seat unit?) and is easy to take off and clean.
I might as well do it whilest I'm working the bike.
Hi- I did a video on carb cleaning & balancing a Fazer- the carbs ( I believe) are similar. Hope it helps
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