Carburettor refurbishment

[Oldtimer]

Hello Members and a happy new year!

I'm doing a bit of fettling with the bike at the moment, in the off season. I would be obliged for a recommendation for carburettor refurbishment. My unit is in need of a full rebuild including new slider, jets, etc...

Best regards to all,

Dave

[Mick D]

Hi

New carbs are available at, what I consider to be, very reasonable cost. Depending on how much 'work' yours requires it may be more economic to replace.

See here for instance: http://amalcarb.co.uk/

Regards Mick

[ajscomboman]

The clubs parts service sell them cheaper.

[Expat]

Happy New Year also!

Took a punt and just fitted an oversize slide, together with new jets and jet needle etc from the club. I feel the expenditure at about half the cost of a new carb has made the work worthwhile and made a noticeable difference to running of the bike.

If it hadn't, then a new carb would be next. As Mick D said, it depends how bad the current carb is.

Cheers,

Steve

[Bruno]

Hello,
How old is the carb? If you are replacing the slide, I am guessing it is pretty worn in which case Mick might be right to opt for a new carb first off.

The overhaul kits usually give new washers and seals plus needle, needle jet, main and pilot jets and float valve. It is quite comprehensive and has sorted my old carbs nicely.

If the motorcycle is a runner and was able to idle OK etc, you could try a refurbishment first. Why are you replacing the slider?

Cheers, Bruno

[Oldtimer]

Hi Bruno,

The slide has play in the carb body and the engine won't idle. The previous owner Had the bike for 28 years and never had carb trouble. He suggested a re-sleeve. I will price a new carb from the club. Thanks. Dave

[Oldtimer]

The clubs parts service sell them cheaper.

Thanks for the tip

[Oldtimer]

How do I know which model ref my carb is? The bike is a stock 1961 350 heavyweight. Thanks. Dave

[Mick D]

Hi

Type in the details in the link I gave you - confirm with the relevant parts manual on the archive

Regards Mick

[ajscomboman]

You just give the parts service the details of your bike and they have a spec book which will give them all the details which jets etc the bike left the factory with and will jet it accordingly. But to help out this is the spec accoding to the owners manual.

Monobloc 376 1 1/16" choke size

210 main jet

3 1/2 slide

106 needle jet

needle clip in centre notch

30 pilot jet