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Singles / (bsa b25 starfire poor starting
« on: 31 January, 2020, 17:19:42 »
Hi . Hoping someone can help, before i loose my rag and throw the teddy out of the pram.

I have a 1970 Bsa  B25 Starfire which is very difficult to start.i have a good spark, but its taking an age to prime the plug with petrol.
Carb fitted is Amal 928 concentric with all factory settings.
Carb has been rebuilt with new throttle slide,pilot air screw,throttle stop, the only item i have not replaced is the throttle needle.

I can take up to 25/30 kicks before its fires ,then running and restarting no problem.

When you remove the spark plug having primed/kicked you would expect the plug to be wet, not the case. Clutch adjusted so engine not slipping whist starting/running.
Yes the bike has been idle for a little while , so how can i improve the starting technique?

Bike performs well on the road, and very happy once its going

any advise would be helpful. cheers.



Singles / bsa starfire b25, will not idle
« on: 11 July, 2019, 17:45:09 »
Hi guys.

I have for some time suffered on my B25 Starfirel with engine not idling,.currently fitted with Amal 900 concentric  Carb. Have currently replaced .
throttle slide
main jet
pilot jet
throttle stop
cleaned carb

Have also replaced condensor to cure misfire over 55mph. sorted.

Just ordered a replacement air screw.
Any thought/help would be appreciated.



Singles / 1970 b25 starfire
« on: 01 April, 2017, 15:51:55 »
Hi guys

i am having a misfire underload, albeit when reaching 55mph (cruise speed)/and 30 miles into ride all is well. Any ideas? Engine has recently
been rebored etc and still running in ?

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