BSA Owners' Club Forum

The BSA Workshop => Singles => Topic started by: TTJOHN on 11 September, 2017, 11:55:45

Title: B25 starting problem
Post by: TTJOHN on 11 September, 2017, 11:55:45
I have a recently aquired B25 with Boyer Bransden ignition, I have had it running a couple of times but now all I get is it fires up then almost imediately cuts out, just wonderinbg whether it could be a faulty coil, what does the team think?

TTJohn
Title: Re: B25 starting problem
Post by: CLIVEDACKUS on 11 September, 2017, 20:28:36
Weak battery, dirty carb, blocked breather in fuel cap.
Title: Re: B25 starting problem
Post by: TTJOHN on 11 September, 2017, 22:18:12
Weak battery, dirty carb, blocked breather in fuel cap.
No mate, none of these, all checked.
Title: Re: B25 starting problem
Post by: Phil C on 13 September, 2017, 14:15:54
Hello TTJohn, Just curious - did you find out the cause? (I have no idea, being new to this.)   Phil.
Title: Re: B25 starting problem
Post by: TTJOHN on 18 September, 2017, 10:29:27
Not yet Phil, I have just got a new carb and I'll give that a go, I have left it foe a while though as I've been working on other bikes.
Title: Re: B25 starting problem
Post by: ANDY HIGHAM on 18 September, 2017, 11:40:55
My bet is a blocked pilot jet
Title: Re: B25 starting problem
Post by: MICKREEVES on 23 September, 2017, 07:11:47
Disconnect the fuel pipe from the carb. check that you get a good flow of fuel.
Mick
Title: Re: B25 starting problem
Post by: TTJOHN on 25 September, 2017, 09:19:45
New carb and set up did the trick, I can now report that the starting issue has been solved, I also went out on Thursday last just to try it out, one or two teething problems which were quickly overcome, so I now have a nice little bike to poodle along on, while I spend some time on the others.
Thanks all for all the advice and suggestions.

Kind regards TTJohn