carb cleaning

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carb cleaning

Post by Clarky_two on Wed Sep 09, 2015 8:39 pm

Anyone got a good guide for cleaning a carb out, 400 exc 2006.

Never done it myself, although I have taken it apart, just didnt know EXACTLY what to do. I would like an idiots guide step by step. Ive looked on youtube but didnt think its was much help there.

The problem I got is - if I want to just lift the front to pop over things using the throttle, there is a slight delay then it comes up, rather than poping up on demand. its not every time just when I give it a bit of beans to get over a little steep sided stream or something like that. I end up moving my body in anticipation of the front coming up, but as it delayed I often end up smacking my chin on the bars.

Any ideas? I though maybe the carb needed cleaning?? scratch
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Re: carb cleaning

Post by Taffy350 on Wed Sep 09, 2015 8:51 pm

New pilot & main jet I'd go with 1st. Even tho they may look clean the slightest bit of unseen Shit can make hell of a difference. Stretched throttle cable. If your gonna clean the carb do it properly by getting it sonic cleaned. Ring Dene of 2 wheel engineering. Bridgend. Tell him the symptoms & he'll give you the solution. 01656 653896


Last edited by Taffyboy07 on Wed Sep 09, 2015 8:52 pm; edited 1 time in total
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Re: carb cleaning

Post by kirky on Wed Sep 09, 2015 8:52 pm

Brand new bike time mate
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Re: carb cleaning

Post by Clarky_two on Wed Sep 09, 2015 9:06 pm

Kirky I have nearly replaced everything on it now ( it was fucked when I bought it I reckon) lol - but seeing Mels new Six Days 500 did make me think.....
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Re: carb cleaning

Post by Taffy350 on Wed Sep 09, 2015 9:20 pm

What about when you see my 2016 new 6 days next week. Lol
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Re: carb cleaning

Post by curl666 on Wed Sep 09, 2015 9:38 pm

400 exc are a lovely bike to ride! Wish I never sold my 2005 Sad

I had a 450 exc carb apart today and cleaned it out. I'm thinking of investing in a small ultrasonic tank.

With the carb removed I always block both ends and start by cleaning the carb externally. To remove any loose dirt that may end up inside when you have the covers off.

With bottom cover off, push the pin out that holds the floats in place. Lift up the floats and the fuel valve should come with it. 6mm socket and 8mm socket to remove the jets. The white plastic shroud in the centre now lifts off. Flat blade driver for the next two, either side.

On the bottom cover, there is a small diaphragm behind the 3 Allen bolts. Pop the diaphragm out and clean it. Careful not to pierce it and watch for the two o rings. Clean it and reassemble.

From the top, remove the screw on the slider arm. Lift up the throttle slider and set it on bench. It's at this point I usually blast the shite out of the carb with both covers off. Top is usually full of a grey film.

After cleaning all the jets and parts on the bench with air gun and carb cleaner I reassemble. Usually if you hold the jets upto the light, you should be able to see a perfect circle of light through them.

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Re: carb cleaning

Post by kirky on Wed Sep 09, 2015 9:41 pm

Brake cleaner good for cleaning
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Re: carb cleaning

Post by steve on Wed Sep 09, 2015 9:49 pm

Dude said his bike was more responsive since he dumped the recluse.
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Re: carb cleaning

Post by wolfy on Wed Sep 09, 2015 9:54 pm

Semiautomatics always have a delay, quick flick of the clutch may help ?
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Re: carb cleaning

Post by curl666 on Wed Sep 09, 2015 10:01 pm

kirky wrote:Brake cleaner good for cleaning

Buy it from a car motor factors too. Don't go to a bike shop.

£4 in my local motor factors or £8.99 upwards at a bike shop Sad

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Re: carb cleaning

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