1954 BSA B31 Plunger Gear control quadrant.

[briancairns]

Hi,
Working on my gearbox at the minute but have got myself mixed up.
Can anyone tell me which notch on gear control quadrant is 4th gear?

I think I have it in 4th at the minute.
Thanks in advance
Brian

[Ian C]

AFAIK, the current position is 1st gear. HTH

[briancairns]

Ok thanks,
I think I have messed up.
I set bike in 4th gear ( or so i thought), with the gearbox still in bike I took gearbox back plate of as I had to change the layshaft bush ( with cut out for speedo).When putting it back together I then set gear control quadrant in 4th, put everything back on , remembering to set the gear change ratchet lever in 4th also.
However when I tested bike I am only getting 2 gears ( no idea which ones) and a neutral. Thats why I was quering the correct notch for 4th gear.
I never touched gear cluster, which remained in situ. Is there anyway easy of telling which gear I left the cluster in?

Thanks in advance
Brian

[briancairns]

Ok thanks,
I think I have messed up.
I set bike in 4th gear ( or so i thought), with the gearbox still in bike I took gearbox back plate of as I had to change the layshaft bush ( with cut out for speedo).When putting it back together I then set gear control quadrant in 4th, put everything back on , remembering to set the gear change ratchet lever in 4th also.
However when I tested bike I am only getting 2 gears ( no idea which ones) and a neutral. Thats why I was quering the correct notch for 4th gear.
I never touched gear cluster, which remained in situ. Is there anyway easy of telling which gear I left the cluster in?

Thanks in advance
Brian
 For information I had definitely set the gear control quadrant in 4th......not what is shown in attached photo of my initial post.

[Ian C]

Do you have access to BSA Service Sheet 608 which should help you? I found it on the below site.

https://bsa-info.nz/service-sheets/#ServiceSheets

[briancairns]

Hi Ian,
I think I do.

Thanks
Brian

[limeyrob]

When you look at it you can see 1 notch (1st), a gap, a 2nd notch (neutral) a gap and 3 notches close together (2nd, 3rd and 4th).  So in the photo the pawl is in 4th

[briancairns]

When you look at it you can see 1 notch (1st), a gap, a 2nd notch (neutral) a gap and 3 notches close together (2nd, 3rd and 4th).  So in the photo the pawl is in 4th

Hi ,
so going by attached photo in my initial post, the gear control quadrant is in 4th??

thanks
Brian

[Ian C]

I believe I was correct.

[briancairns]

I believe I was correct

Yes Ian,
Thanks for this.
I got BSA service sheet 608 and that also confirms. looks like I may have to take gear box out totally and re-install from scratch.

Thanks for your help
Brian

[Ian C]

No problem Brian. Glad to be of assistance 

[briancairns]

Thanks again Ian.

Brian

[Pete C]

Hi,
I have a fairly detailed document on these gearboxes which includes hints on reassembly. If you are still having problems, let me know and I can forward it to you.

cheers
Pete

[briancairns]

Pete,
That would be great if you could.
Can you dm on this forum so I can forward my email?

Thanks
Brian

[briancairns]

Hi,
I have a fairly detailed document on these gearboxes which includes hints on reassembly. If you are still having problems, let me know and I can forward it to you.

cheers
Pete

Hi Pete,

I sent a PM to you with my email address.
I am only starting to do my own mechanics.....so quite unsure of a lot of things!

Many thanks