SOHC.co.uk Forums > CB350/400

CARBS

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randka:
thanks for putting the photos on, my brass ware isn't as bad as yours but need cleaning, my pilot jets are blocked I didn't realise, the hole is so small they are difficult to unblock, a calm hour is required or buy some new ones although I don't like to give up.
super cycle cleaner S100 is very good for cleaning the surface of your carbs inside and out also WD40, worked for me anyway, if any one can guide me to a good item to clean that hole in the pilot jet I would appreciate it

Yoshi823:
What I am about to suggest may be frowned upon, but it works. I have a wire brush with just the right size wire that goes into the main orifice on the pilot jets on Teresa's old CB550F2, which I had to use when I was about to sell the bike. It wouldn't run on all four cylinders, so used the wire method & it worked quickly & easily.
One of the problems with this method may be that the pilot jet size for the 400F are smaller than the 550F.

Machine Mart now sell an ultrasonic parts cleaner. This might be a good & worthwhile purchase.

Good luck.

470four:

--- Quote from: Yoshi823 on April 07, 2011, 11:06:18 PM ---What I am about to suggest may be frowned upon, but it works. I have a wire brush with just the right size wire that goes into the main orifice on the pilot jets on Teresa's old CB550F2, which I had to use when I was about to sell the bike. It wouldn't run on all four cylinders, so used the wire method & it worked quickly & easily.
One of the problems with this method may be that the pilot jet size for the 400F are smaller than the 550F.

Machine Mart now sell an ultrasonic parts cleaner. This might be a good & worthwhile purchase.

Good luck.

--- End quote ---


Seconded... I used a long-bristle wire brush wire to clear the jets on the CBR600.  :)

Lidl sold an ultrasonic "jewellery" cleaner for like

randka:
Carbs are back on and the old bike fired up straight away, noticed the off side outer exhaust was luke warm so had to take the carbs back off and found the pilot jet was still blocked although I thought I had cleaned it, any way carbs back on and it sounds good, obviously it will want tuning up properly and I won't know how its running until I take it down the road.

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