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Kick start keeps jamming #429808
04/15/12 1:09 pm
04/15/12 1:09 pm
Joined: Apr 2009
Posts: 164
Cleveland, OH
T
TheInvisibleCity Offline OP
BritBike Forum member
TheInvisibleCity  Offline OP
BritBike Forum member
T
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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Re: Kick start keeps jamming [Re: TheInvisibleCity] #429820
04/15/12 3:01 pm
04/15/12 3:01 pm
Joined: Aug 2001
Posts: 4,292
Santa Barbara, California
KC in S.B. Offline

BritBike Forum member
KC in S.B.  Offline

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Joined: Aug 2001
Posts: 4,292
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, 1 '56 Chevy
Oops,.. add 1 Sporty
Re: Kick start keeps jamming [Re: KC in S.B.] #429899
04/15/12 9:05 pm
04/15/12 9:05 pm
Joined: Oct 2008
Posts: 4,994
Gnashville
DavidP Offline

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DavidP  Offline

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Joined: Oct 2008
Posts: 4,994
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"
72 T120V cafe project "Mr. Jim"
Re: Kick start keeps jamming [Re: TheInvisibleCity] #430134
04/16/12 10:39 pm
04/16/12 10:39 pm
Joined: Oct 2007
Posts: 1,536
Auckland NZ
Ignoramus Offline
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Ignoramus  Offline
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Joined: Oct 2007
Posts: 1,536
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)
Re: Kick start keeps jamming [Re: Ignoramus] #430157
04/17/12 1:09 am
04/17/12 1:09 am
Joined: Mar 2006
Posts: 3,718
gastonia nc
R
raf940 Online content
BritBike Forum member
raf940  Online Content
BritBike Forum member
R
Joined: Mar 2006
Posts: 3,718
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
Re: Kick start keeps jamming [Re: TheInvisibleCity] #430161
04/17/12 1:26 am
04/17/12 1:26 am
Joined: Aug 2001
Posts: 4,433
Owego, NY, USA
Mark Z Offline
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Mark Z  Offline
BritBike Forum member
Joined: Aug 2001
Posts: 4,433
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.
Re: Kick start keeps jamming [Re: TheInvisibleCity] #430167
04/17/12 2:24 am
04/17/12 2:24 am
Joined: Jan 2006
Posts: 1,893
Maryland
JD Offline

Moto-Amish
JD  Offline

Moto-Amish
Joined: Jan 2006
Posts: 1,893
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
Re: Kick start keeps jamming [Re: TheInvisibleCity] #430199
04/17/12 10:30 am
04/17/12 10:30 am
Joined: Aug 2001
Posts: 3,867
argyll. scotland, uk
gavin eisler Online content
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gavin eisler  Online Content
BritBike Forum member
Joined: Aug 2001
Posts: 3,867
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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