Burman BA Gearbox, How Does It Work?

A video delving into the inner workings of the Burman BA gearbox

[@glaicogobbo4046]

Going back to remembering the excellent explanation of the engagement of all gears and the selector shaft of the Burman box. We always have to thank you your competent and honorable person. GRATEFUL!

[@vonryansexpress]

Facinating - I can't tell you how many "Exploded" Lawrie Watts diagrams I have pored over through the years without ever fully grasping how the mechanism functions . . . Now I know, wonderful video - thanks for producing this . .

[@truethought369]

Thank you, although I have worked on many old Brit-Bikes over the years, its nice to have the 4-speed Burman- box explained in a nice simple way.

[@mikebeattie2670]

Brilliant. Thanks for the clarity Alan.

[@RolfClausen]

Very good. Thank you. Solved all my questions for a reassembly.

[@colvinator1611]

Alan thank you very much. I have never seen or heard a simpler, clearer explanation of the workings of these gearboxes.

[@alanmoore6482]

It's good to know the video is still of interest and helping 👍

[@colvinator1611]

@@alanmoore6482 I had a G12 Matchless in the mid '60's and I'm now looking to do a G80/M18 ( mid ' 50's ). I'm starting from scratch so I'll be looking for a frame to begin with. Thanks again Alan.

[@paulflor198]

Thank you Sir! This helped me understand how my '56 BSA c11G gears work. I'm in the process of rebuilding it. Cheers!

[@classicrider5274]

This is still helping people so another thank you for preparing. I have a CP to rebuild this winter. Paul

[@pablorosales1149]

Thank you, Mr Moore. Your explanation is excellent, in this always dificult piece (fot my understanding) of an engine. Not only I listened it till the end, but I shall repeat this video when I 'll repair my Matchless. Best regards!

[@derekgee4223]

Excellent demonstration, thanks for sharing

[@frederickbowdler8169]

I always wondered how it works thanks. you made it clear.

[@bradfisher478]

Very helpful. Clear and concise. Thank you!

[@gentlerowdy]

well you deserve to be called as my master it was amazing video- the first time i saw the gear box of my norton i really felt to have so much of sleep- you have made things so easy trust me, I still have to understand the conversion of power from where it comes & how its transmitted- I am sure watching your video a few more times will tach me that- thank you once again.

[@frogbatter]

That was excellently explained & demonstrated, thank you.

[@meharr1]

Great information. Just planning for a first-time restoration on such a gearbox. Thanks

[@dasunchathuradha2425]

Thank you very much for this Alan. You saved my years of work. Great man you are

[@alanmoore6482]

Thank you for the comment, I am glad it was useful

[@craigkeller]

Great video! Thank you for your efforts.

[@bsawm6692]

Excellent video, thanks for your effort and time

[@bedfordowner]

Excellent video thank you

[@christidmas3995]

Excellent video

[@andyeastwood7137]

Brilliant Alan, after the clutch activator boss snapped off my Red Hunter I was confused about putting it all back together after the repair, it was the last two minutes when you showed the punch marks on the gear selector quadrant and lay shaft gear! I would never have figured that the false neutral was there for a reason!!! Thank you!!!

[@alanmoore6482]

My pleasure

[@gregorydahlen2103]

Thank you Alan. I finally have a better idea of how my '36 Cammer and '40 Iron Square Burmans work!

[@stevebrinker6983]

Brilliant! Thanks.

[@johnmeasures583]

Extremely helpful and very clearly explained, thanks Alan for your time and effort

[@Mr851Tricolore]

Thank you! :-)

[@julianrubiol7524]

thanks, this is so clare (my Inglish is poor). This is a magic blackbox to my.

[@alanmoore6482]

pleased the video is helping people understand the workings

[@jeromechigard4236]

Hi Alan, thank you for this video. I’m facing an issue with BA gearbox. Somme time to time the gearbox locks as if two speeds were engaged simultaneously. I can’t understand how this is possible ? Do you know the answer ? Thank you.

[@rogerdurham3750]

Great Video Alan, any chance you could do another video showing how to set up the selector and Kick start mechs?

[@alanmoore6482]

Sorry but the gearbox is now in the bike. This video does show how to.set up the gearchange selector...it's at the end

[@stephenebbs3501]

Excellent - thanks so much - when will your gearbox wear video be ready?

[@alanmoore6482]

thanks for the comment. I have just bought some telescoping gauges to measure the internal dimensions of the bushes. once I have worked out how to measure with them accurately I will get on with documenting the wear and produce a video

[@jamesh66]

Brilliant! Thanks! Are there any significant differences in the CP gearbox do you know? (Does the 9 O'clock rule for setting up neutral still apply?)

[@alanmoore6482]

James...I believe they are similar and I think the rule for lining up the marks applies to the CP as well

[@classicbikeman]

HI Alan - superb video very helpful indeed. I have a 52 Vincent comet with a burman gearbox all gears select well but all except in 1st gear it seams to now create a judder ( no crunches or grinding noises) as though it is almost trying to jump out of gear. Is this likely to be a clutch issue or could it be something to do with the gearbox in particular the 'spring box' ?

[@alanmoore6482]

Yes I think the spring box is the most likely culprit. It is the box mech that keeps the cam held in place.

[@classicbikeman]

@@alanmoore6482 Thanks Alan - I'll focus my attention on that area of the gearbox and let you know how I get on.

[@thra5herxb12s]

Why do they crunch so much when changing gear. Is it because the grease drags the shafts around, or is it another problem. My first CP box was really sweet but was oil filled.

[@alanmoore6482]

Both my BA on the VH and CP on the WNG are filled with semi fluid grease...basically a mixture of standard grade grease and SAE50 engine oil. They both have had an oil seal fitted on the output in place of the old style felt washer/s set up which helps keep it all inside the box. Both are quite on changing. Could be the grease but i think more likely the clutch isn't clearing fully?

[@rossbarker3362]

Hi Alan, Excellent Video, do you have any of these gear boxes to sell? I have purchased a Motorbike, a 1964 American Mustang Trail machine which came with one of these gearboxes more or less, here in America they are Very expensive and of dubious quality, I would like to buy one or alternatively fit one of these NOS Gearboxes from The Royal Enfield, I see many online, also very expensive but new, I am looking this morning for somebody to ask if it might fit in the same mounts on the frame or if indeed it is a good idea or perhaps better a nice Burman, perhaps better if I could find it? Can you help with either?

[@Wayan_Suparma]

Please assist me to rebuilt my gearbox. The second gear and third gear are not working. It is back to neutral.

[@rossbarker3362]

@@Wayan_Suparma I haven't rebuilt mine yet, Let me know if you find a source for rebuild labors

[@redtobertshateshandles]

They seem pretty rugged especially the number of dogs. Japanese bikes change easily but sometimes aren't very durable. Thanks for showing. p.s Don't say the 'f' word, false neutral.

[@pietermouton5903]

hey I have the same gearbox with the same end, can you tell me the type of gearbox or can ik have your emailadress so I can ask some further information please, tnx Pieter

[@Wayan_Suparma]

Who to lock each gear so they will not back to neutral???

[@alanmoore6482]

The gears are locked in place by the 'spring box' which is not shown in this video