The BSA A7-A10 Forum
Technical (Descriptive Topic Titles - Stay on Topic) => Amal, Carburation, Fuel => Topic started by: scotty on 14.06. 2016 04:03
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Kicked the A10 into life today....it's been 15 months idle.... *eek*
Starts fine but will only run with choke on
carb is clean with no obvious weirdness with the cables
Its got a 170 main jet and no air filter
Pilot jet is .107 and needle position is 2nd notch
I read in some previous posts that bigger main jet required if running without air filter
The main jet came with the carb new over a year ago
What size jet would I be looking to increase to in this case ?
S
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*clap* *clap*
Nice one scotty, now;
Its got a 170 main jet and no air filter
Pilot jet is .107 and needle position is 2nd notch
I read in some previous posts that bigger main jet required if running without air filter
I dunno if it matters what carb it is, but I think the Pilot jet should be in the vicinity of .25, .107 is likely the needle jet and may be a bit big Monoblocs generally have a .106, but I have to run a .105 needle jet.
I have a .240 main jet, but even at THE TON *eek*(100km/h *smile*), I'm still only at about 1/4 on the twist grip *conf*, I say so get it running on the low jets first and worry about the main/J later .......*dunno*
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The first thing I noticed was the .107 needle jet (not pilot) might be a bit rich even without a filter, but you say it needs choke to run *dunno*. Fuel height (float height) might be a bit low or a restriction to the feed.
Been a long while since I ditched the 276 for a concentric.
Cheers
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oops.......getting my jets mixed up there !
Thanks for the replies
I'll wear my glasses and investigate further
Cheers
S
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"oops.......getting my jets mixed up there !"
At my age happens all the time ....
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Scotty,
You may need to take out your jet block and clean the pilot jet. This is often overlooked on the 276 and like carbys as it is not easily accessed.
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Thanks Trev
I'll be stripping the carb down on the weekend and will investigate the jet block
S