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#429808 - 04/15/12 1:09 pm Kick start keeps jamming  
Joined: Apr 2009
Posts: 164
TheInvisibleCity Offline
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TheInvisibleCity  Offline
BritBike Forum member

Joined: Apr 2009
Posts: 164
Cleveland, OH
About every 5 or so kicks on my A65, the teeth on the kick start spindle doesn't mesh quite right with the pinion on the mainshaft and everything gets all jammed up. Seems to be the last tooth on the spindle because it won't jam if I don't let it return all the way, but that is almost impossible to regulate unless I'm really thinking hard about it.

I have had it apart and couldn't really see anything wrong with it. This bike is a bitsa, so I'm wondering if the spindle and pinion are slightly different for different years and maybe I have a pair that doesn't like each other? Or is there something else that could be somehow catching up and I'm just missing it? The motor is a '68.


Last edited by TheInvisibleCity; 04/15/12 1:11 pm.

'69 A65T
'66 A65T
Late 60's Lightning Bitsa
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#429820 - 04/15/12 3:01 pm Re: Kick start keeps jamming [Re: TheInvisibleCity]  
Joined: Aug 2001
Posts: 4,069
KC in S.B. Online content
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KC in S.B.  Online Content

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Joined: Aug 2001
Posts: 4,069
Santa Barbara, California
This not uncommon on these 40+ yr old bikes, in my opinion anyway. I have experimented with "fixes", which is a pain, because you have to assemble/dis-assemble to see if that works each time..... Anyhow, AND I WILL NOT PROMISE IT'S THE ANSWER, I did have some luck just grinding off the 1st tooth on the kicker shaft. It seems like that one gets flattened, and is the start of the jamming. The gear teeth on the trans get flat too, so try to find a better one if possible. My $.02.... KC


Down to 1 BSA, 2 Triumphs, 2 '56 Chevys
#429899 - 04/15/12 9:05 pm Re: Kick start keeps jamming [Re: KC in S.B.]  
Joined: Oct 2008
Posts: 4,860
DavidP Offline
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DavidP  Offline

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Joined: Oct 2008
Posts: 4,860
Gnashville
Originally Posted By: KC in S.B.
I did have some luck just grinding off the 1st tooth on the kicker shaft. KC

Oh, you mean make the thing like a Triumph kicker quadrant? What an idea!
The same thing happens with mine, just a part of the BSA, "charm."


Stepping on others doesn't make you stand tall.

71 A65L "Zelda"
92 BMW K100rs "Gustav"
#430134 - 04/16/12 10:39 pm Re: Kick start keeps jamming [Re: TheInvisibleCity]  
Joined: Oct 2007
Posts: 1,512
Ignoramus Online content
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Ignoramus  Online Content
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Joined: Oct 2007
Posts: 1,512
Auckland NZ
This has pretty much been an issue with A65s from day one. Ive heard all sorts of theories including it was a tooling problem that never got addressed and the gear center geometry didnt match up properly (wouldnt surprise me that much)

My personal opinion is that the gear modual (or what ever the technical term is Ive forgotten) is not sufficently course to prevent the crests of the teeth interfeering in some positions ie the crests lock rather than mesh properly.

Dont know the soulution apart from constant new bits ....Ive tried relieving the first tooth or 2 on the quadrant ...didnt make any diffrence,....its always been an issue .....the pre unit kick starts are much heavier and never seem to give a problem....just BSA cost cutting probably.

Im surprised there havent been more comments and theories on this topic


"There's the way it ought to be and there's the way it is" (Sgt Barnes)
#430157 - 04/17/12 1:09 am Re: Kick start keeps jamming [Re: Ignoramus]  
Joined: Mar 2006
Posts: 3,647
raf940 Offline
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raf940  Offline
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Joined: Mar 2006
Posts: 3,647
gastonia nc
the kicker on my A65 has never jammed...the one on my T120V takes 'spells' and sometimes will do it frequently but has not done so for the last couple of months ...when it does, i just cuss, put it in gear and rock the bike, and then it is free.....in other words, live with it.


1972 Triumph T120
1968 BSA A65
1968 MGB Roadster
1979 Chevrolet Camaro Berlinetta
1969 Honda Mini Trail
1939 farmall f30 tractor
2004 Honda Shadow Aero
1972 BSA Thunderbolt
1975 yamaha xs650b
1972 Norton commando project
#430161 - 04/17/12 1:26 am Re: Kick start keeps jamming [Re: TheInvisibleCity]  
Joined: Aug 2001
Posts: 4,189
Mark Z Online content
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Mark Z  Online Content
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Joined: Aug 2001
Posts: 4,189
Owego, NY, USA
This MIGHT be worth looking into... Coupla things: 1. You said it doesn't jam if you let it return all the way - weak return spring?

2. There's supposed to be a stop threaded into the inner timing cover; I've seen them missing altogether. Oh yeah, the kickstart quadrant still stops, by jamming against the timing cover!

I've had 'em jam and not jam. When they jammed, something wasn't right. Take another look.


Mark Z

'65(lower)/'66(upper, wheels, front end, controls)/'67(seat, exhaust, fuel tank, headlamp)/'70(frame) A65 Bitsa.
#430167 - 04/17/12 2:24 am Re: Kick start keeps jamming [Re: TheInvisibleCity]  
Joined: Jan 2006
Posts: 1,838
JD Offline
Moto-Amish
JD  Offline

Moto-Amish

Joined: Jan 2006
Posts: 1,838
Maryland
Just from my observations, I would agree with Ignoramus. Mine's always done that and I just pull in the clutch lever and tap on the kickstart lightly with my foot until it frees up.


Josh
#430199 - 04/17/12 10:30 am Re: Kick start keeps jamming [Re: TheInvisibleCity]  
Joined: Aug 2001
Posts: 3,401
gavin eisler Online content
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gavin eisler  Online Content
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Joined: Aug 2001
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argyll. scotland, uk
IME "you get that with them Sir" its not helped by wear.


71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod

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