Lumpy Idle

bandit600 · Derestricted Danger Joined: 19 Aug 2010 Karma :

I have a 98' 600 Bandit which is very lumpy on idle.
It is up and down and does not sound smooth.
I have replaced the plugs, oil, oil filter and had the carbs off and cleaned them with carb cleaner. I have also been adding redex to the fuel.
The only thing i have not got round to is repalcing the air filter.
Could this be causing the issue?

cheers

chris-red · Have you considered a TDM? Joined: 21 Sep 2005 Karma :

Doubtful, sounds like it needs carb balance to me.
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Digit · Scooby Slapper Joined: 22 Aug 2010 Karma :

As Chris said.

Roy.
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el_oso · World Chat Champion Joined: 17 May 2008 Karma :

it is firing on all four cylinders isn't it?
easy to check by touching each of the headers in turn with a wet sponge or cloth and listening for it to sizzle.
CAUTION:header pipes get extremely hot extremely quickly.

if all four are working then balance your carbs
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bandit600 · Derestricted Danger Joined: 19 Aug 2010 Karma :

It is firing fine on all 4 cylinders, yes the headers are all very hot.
i have enquired at my local garage and they would charge me £50 per hour plus vat and it will take them 2 hours to balance the carbs.
This sounds a lot to me, anyone any ideas on what it should be, or am i being tight?

Cheers

Digit · Scooby Slapper Joined: 22 Aug 2010 Karma :

Tight??? I can't move! Very Happy

Buy a set of guages and DIY.

Roy.
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bandit600 · Derestricted Danger Joined: 19 Aug 2010 Karma :

I think i might just do that.

Cheers Roy.

Digit · Scooby Slapper Joined: 22 Aug 2010 Karma :

Then you can do your mates bikes at £40/hr! Laughing

Roy.
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Ditto · Nearly there... Joined: 26 Sep 2009 Karma :

Don't get them balanced until you've done a full service, oil, plugs, valve clearances etc. Balancing should be the last step.
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