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A 10 Gearbox troubel #771197
04/16/19 9:31 am
04/16/19 9:31 am
Joined: Jan 2009
Posts: 480
Germany North
expresidente Offline OP
BritBike Forum member
expresidente  Offline OP
BritBike Forum member

Joined: Jan 2009
Posts: 480
Germany North
hello folks
Was working on a friends bike lately. It is a BSA A 10 with swing arm frame. The gearboxes used to be bulletproof, as much as i know them. Must say that the bike must had have a very hard life, because he brought it back home from India. That was years ago and since he spend lots of money and effort to the bike. Had the complete box out and dismantled. Got new bearings, bushes, shafts slipped and all that stuff what was needed. He said that the third gear jumps out then and when, especially when riding with his wife. I did check the gears and changed them to a matching set for the third, because the old ones showed some wear. Also changed the shifter fork and checked the spring tension of the cam plate.The problem now is, that the third gear still jumps out under load. Any suggestions, what i should watch out for ?

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Re: A 10 Gearbox troubel [Re: expresidente] #771201
04/16/19 11:55 am
04/16/19 11:55 am
Joined: Dec 2004
Posts: 9,923
Scotland
kommando Online content
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kommando  Online Content
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Joined: Dec 2004
Posts: 9,923
Scotland
If you swapped out the 3rd gears then you missed out the sliding gear that slides across and locks 3rd gear to the shaft, if the dogs on that are worn then 3rd will still jump out.

Re: A 10 Gearbox troubel [Re: expresidente] #771202
04/16/19 12:24 pm
04/16/19 12:24 pm
Joined: Aug 2001
Posts: 5,190
Stone Creek OH USA
R
Rich B Offline

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Rich B  Offline

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R

Joined: Aug 2001
Posts: 5,190
Stone Creek OH USA
Not sure if you have seen this or not, it is a sticky in the GS forum

http://www.britbike.com/forums/ubbt...mission-info-swing-arm-models#Post713333


Never underestimate the human ability to elevate stupid to a whole new level!.
Re: A 10 Gearbox troubel [Re: kommando] #771206
04/16/19 12:49 pm
04/16/19 12:49 pm
Joined: Jan 2009
Posts: 480
Germany North
expresidente Offline OP
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expresidente  Offline OP
BritBike Forum member

Joined: Jan 2009
Posts: 480
Germany North
hy commando
Yes you are absolutely right. When i was saying that i changed the gears, i wanted to tell that i swapped the pinion gear and the sliding gear from the main shaft. I dont think the other 3. gear of the layshaft would cause the problems. Sorry if i described it not exact.
hy Rich
thanks for the link.
But i dont think it is a question of shimming the gears. but i could be wrong. And am willing to learn something new.


Moderated by  Allan Gill, Jon W. Whitley 

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