BSA Owners' Club Workshop Discussions

The BSA Workshop => Singles => Topic started by: Excelsior1926 on 12 Jul, 2025, 06:49

Title: C-11G gearbox woes
Post by: Excelsior1926 on 12 Jul, 2025, 06:49
Hi guys, this is my first post from OZ.
I  have 3 x BSA 250`s.. A Rigid C-11 3speed (Sn.ZC11 1199*). a Plunger C11G 4speed (Sn.ZC11 709*) and another C11G in parts Plus a heap of spares, along with other Brit bikes.
Excelsior, Norton etc
My Problem, I haven`t started any of these bike for over 5 yrs,so fresh fuel, new engine oil, charge battery etc..a bit of a tickle then 3 kicks and I`m grinning... BUT have found the gear lever on the C!!G doesn`t return to neutral position. I tried in and out of gear half a dozen times, no change..had to do it by hand.
I haven`t tried to ride it as is. Gearbox oil fine, clutch disengages OK, what`s the go? Leave it for another 5 or so years or pull the outer G/box cover off and check it out.
Thanks in advance for any help you can offer,
Roger in OZ.
Title: Re: C-11G gearbox woes
Post by: idie on 12 Jul, 2025, 09:47
Sounds like the gearchange spring is weak. Or the shaft for the gear lever is sizing up.
Title: Re: C-11G gearbox woes
Post by: Derek996 on 12 Jul, 2025, 11:00
Agreed. Most likely the gear change return spring.
Title: Re: C-11G gearbox woes
Post by: scifi on 12 Jul, 2025, 20:14
My C11 broke one leg off it's return spring, and I made a mess of taking the outer case off.   Apparently, you are supposed to hold the kick-starter half engaged, not against the back-stop.   I just yanked the back plate off, and damaged the back stop molding, a bit.
The return springs are available quite cheaply on ebay, maybe less than £5..
Title: Re: C-11G gearbox woes
Post by: Excelsior1926 on 12 Jul, 2025, 20:31
Hi,
Thanks so much for the replies, It`s a few years since I have done any work,or even uncovered these bikes, life got in the way, and now in retirement (semi) I feel it`s time to get them all up to spec, and hopefully get some miles under their belts.  It`s amazing how much one forgets in such a short time
This C-11G was the first one to see light, so thats a good place to start.
Thanks once more, Roger in OZ