BSA Owners' Club Forum

General => The Star and Garter => Topic started by: DEAN SOUTHALL on 27 October, 2020, 12:27:28

Title: Why do kick start levers jam?
Post by: DEAN SOUTHALL on 27 October, 2020, 12:27:28
I bet lots of us have expeirienced kickstarts jamming as we try to turn the engine over. My Bantam does it every so often and my recently acquired B28 seems to do it more often than not.
Does anybody know for cetain the cause of this and a remedy?
Title: Re: Why do kick start levers jam?
Post by: idie on 27 October, 2020, 12:43:39
It is usually caused by the teeth on the quadrant riding up on to the teeth on the ratchet gear. This could be worn bushes causing the quadrant to move away from the ratchet gear or general wear on the teeth so that they are forced out of mesh.
Title: Re: Why do kick start levers jam?
Post by: Bess on 27 October, 2020, 15:09:02
Hi,
    A common problem, this thread maybe worth a read

https://www.bsaownersclub.co.uk/bsaoc_forum/index.php?topic=5465.msg26565#msg26565

Best wishes...
Title: Re: Why do kick start levers jam?
Post by: Mike Farmer on 28 October, 2020, 09:46:11
 :) :) :) :)
Hi.

With regard to that post===within the last couple of days I have actually compared a worn quadrant against a new one.

The point that I originally highlighted in green in the original post differs by almost 1mm caused simply by wear.

I got a new one and the problem is solved. Not cheap about 90 with VAT and postage. (From Burton) I had considered building up the old one but uncertain what affect it would have on the metal. I might give that a try with my next one.

Mike 8) 8) 8) 8)
Title: Re: Why do kick start levers jam?
Post by: DEAN SOUTHALL on 28 October, 2020, 13:11:24
Thanks for all the very helpful replies.
I'll getr a new quadrant for the Bantam but I suspect there is no chance of getting one for the B28.
I will have to look at it closely and look onto having it built up and re profiled. I an guessing this will require a bit of re-iterationl.
Title: Re: Why do kick start levers jam?
Post by: BEVANC on 28 October, 2020, 19:59:49
As a matter of interest, I've attached an extract from the 1930 Sloper Owners handbook - the leading quadrant tooth is ground down.

KS jamming is a common issue with Burman boxes as well. Replacement Burman quadrants supplied by the Panther and the Ariel owners clubs have the first tooth ground partly away - see attached image.

Cheers, Bevan
Title: Re: Why do kick start levers jam?
Post by: Mike Farmer on 06 November, 2020, 09:58:35
 :) :) :)

Something I have come to realise is thsi: - After the first kick if you dont let the kick start lever come right back to the top of its travel it can't jam because the teeth remain engaged. If it jams on first kick thats tuff I'm afraid.

Mike 8) 8) 8) 8)
Title: Re: Why do kick start levers jam?
Post by: chaz on 06 November, 2020, 17:58:55
off the stand, in gear, rock back and forwards then have another go.
Title: Re: Why do kick start levers jam?
Post by: Mike Farmer on 07 November, 2020, 10:51:14
 :) :) :)
Exactly.

Mike 8) 8) 8)
Title: Re: Why do kick start levers jam?
Post by: RICHARD MILLS on 07 November, 2020, 17:07:42
Often clears on my B33 by just pulling the clutch lever once or twice.
Title: Re: Why do kick start levers jam?
Post by: chaz on 09 November, 2020, 20:35:10
there's a coincidence..
just been asked the same question by my youngest. playing with his B40, kick start jammed.
Why?7told him to look at the forum for answers and explained why.