classic motorcycle forum

Motorcycle Discussions => British Bikes => Topic started by: cockneydancer on September 29, 2012, 02:03:29 PM

Title: BSA A10 carbretter
Post by: cockneydancer on September 29, 2012, 02:03:29 PM

Hi.
Can anyone advise me.
The problem is that when engine heats to operating temperature, tick over speed increases, even though carb slide is fully closed.  Has been making it difficult to engage gear whilst riding.  Have moved throttle stop screw out, but no difference.

Regards
John, London UK

Title: Re: BSA A10 carbretter
Post by: wetdog on September 29, 2012, 06:34:57 PM

sounds like its sucking air

Title: Re: BSA A10 carbretter
Post by: rogerwilko on September 30, 2012, 12:34:09 AM

That, or a worn slide.Stick your finger against the slide while it's running and see if it slows down.

Title: Re: BSA A10 carbretter
Post by: R on September 30, 2012, 01:12:52 AM

Worth checking first that your fuel level height is set correctly, and the float needle isn't too worn and not correctly shutting off the fuel when it needs to, or is too low

And checking for any air leaks around the top of the carb, including where the cables go in.

If no joy, maybe the carb is really worn in the slide dept, and needs to be resleeved. This can make them like new again, if one of the specialists at this does the whole job and renews everything thats worn.

Hopethishelps.