solex - poor mpg

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Holder of a Golden Anorak
Holder of a Golden Anorak
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Re: solex - poor mpg

Postby simon.holyfield » Sun Mar 31, 2019 7:01 pm

Yesterday I added a fibre washer under my float valve, to make two. This will reduce the fuel level by 1 mm or so.


At the same time, I replaced my B5HS plugs with the standard B6HS.

I think all looks good in the mixture department. The engine is running well and the idle is better - I had to reduce the idle speed setting by 1/2 turn.


'51 Square Four,
'58 Huntmaster,
'42 W/NG,
'30 Model A

Holder of a Nylon Anorak
Holder of a Nylon Anorak
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Location: Kent England

Re: solex - poor mpg

Postby MARK.WALSH » Tue Apr 09, 2019 8:12 pm

I eventually found my original problem was that the timing had slipped on the distributor, probably on that run on new years day. Took a while to figure it out but trial and error got the bike working properly again. In future I will use the fully advanced position for timing as I think the static timing at tdc makes it too advanced - maybe the bob springs are weak when running on tickover.

Anyway - Simes might try your trick with the extra float valve washer and see how the mixture goes

Also I've been busy in other areas - that old sunbeam now runs and sounds fantastic ! I just de-glazed the bore, fitted new rings and made a copper head gasket.. certainly made me smile when it burst into life.

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