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Rating: 5
Timing A10 BSA #440951
06/19/12 4:42 pm
06/19/12 4:42 pm
Joined: Feb 2010
Posts: 383
Upstate NY
R
Red Lapierre Offline OP
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Red Lapierre  Offline OP
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Upstate NY
Is there an easy way? Book shows timing with head off to 3/8" BTC. I have mag w/auto advance. Top end has new pistons. I timed with head off but won't start. I have compression,spark and gas. I have a dial indicator for plug hole and reset timing only got a pop but still won't run. But that is more then I had. Timed again and still won't run. I did not put bottom end together so I might check the engine timing but seem ok. Valve adjustment seem good.Plug has spark when pulled and kicked over.

Thanks for any help.


57 A10 GF
61 A7
61 A10 GF
63 A10 SR
76 CB 125 Honda
76 FLH
2012 FLHTP
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Re: Timing A10 BSA [Re: Red Lapierre] #440953
06/19/12 4:54 pm
06/19/12 4:54 pm
Joined: Aug 2001
Posts: 7,456
scotland
triton thrasher Online content
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scotland
Is it sparking on the compression stroke?


Amateur Loctite enthusiast.
Re: Timing A10 BSA [Re: Red Lapierre] #440970
06/19/12 6:20 pm
06/19/12 6:20 pm
Joined: Feb 2012
Posts: 1,248
Middle East,
Kerry W Offline
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Middle East,
Swap the leads over and try again. Easy to get them on the wrong side.


No generalisation is wholly true, not even this one.
Oliver Wendell Holmes
Re: Timing A10 BSA [Re: Red Lapierre] #440976
06/19/12 6:51 pm
06/19/12 6:51 pm
Joined: Aug 2001
Posts: 2,694
New Hampshier USA
MikeG Offline

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Did you lock advance unit at full advance? I also found on mine that a dial indicator in plug hole will not read correctly due to piston crown and angle of indicator rod. If you started with the head off OK, but if you changed things after that then you're going to have to use another method of locating 3/8. I made a fixture that fits on the drive side of the crank for a degree wheel but there have been several explanations on here about useing a piston stop and marker rod.


1960 BSA A10
2007 Suzuki Bandit
1957 A10
(Used to be a Triumph here)
71 Norton Commando
17 Triumph Bonneville

Re: Timing A10 BSA [Re: Red Lapierre] #440992
06/19/12 8:43 pm
06/19/12 8:43 pm
Joined: Feb 2010
Posts: 383
Upstate NY
R
Red Lapierre Offline OP
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Yes on compression stoke, swapped leads, yes locked full advance. I have done it before but this just don't want to run.
I have made an some thing out of spark plug to try hope it work better then dail indicator.
Thanks again.

Last edited by Red Lapierre; 06/19/12 8:44 pm.

57 A10 GF
61 A7
61 A10 GF
63 A10 SR
76 CB 125 Honda
76 FLH
2012 FLHTP
Re: Timing A10 BSA [Re: Red Lapierre] #441034
06/20/12 1:02 am
06/20/12 1:02 am
Joined: Jul 2006
Posts: 468
just a guy from Jersey [Hopewe...
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nert Offline
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Posts: 468
just a guy from Jersey [Hopewe...
you have spark, fairly sure its near correct time. How abouit fuel. After attempts to start is the plug wet, or dry?


keep your "oddies" lubricated, and carry a dime
Re: Timing A10 BSA [Re: Red Lapierre] #441045
06/20/12 2:13 am
06/20/12 2:13 am
Joined: Feb 2010
Posts: 383
Upstate NY
R
Red Lapierre Offline OP
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it's been both some time wet some time dry. Retimed again and still didn't start. Going to try different carb and see if that works. Going to pull one off one of my other A 10 and try that. I have a feeling it's carb. Timing got to be close enought o get it to start. Hate to pull head off again.


57 A10 GF
61 A7
61 A10 GF
63 A10 SR
76 CB 125 Honda
76 FLH
2012 FLHTP
Re: Timing A10 BSA [Re: Red Lapierre] #441075
06/20/12 9:45 am
06/20/12 9:45 am
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Upstate NY
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Red Lapierre Offline OP
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Not sure what you mean Allan. Brass housing has key way. Gear end is beveled I bolt on with auto advance wedge open as close as I can get to just being able to pull cigarette paper out of points.


57 A10 GF
61 A7
61 A10 GF
63 A10 SR
76 CB 125 Honda
76 FLH
2012 FLHTP
Re: Timing A10 BSA [Re: Red Lapierre] #441195
06/21/12 12:14 am
06/21/12 12:14 am
Joined: Feb 2010
Posts: 383
Upstate NY
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Red Lapierre Offline OP
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No spit back. I only got a pop once or twice but never ran.Will try your method.


57 A10 GF
61 A7
61 A10 GF
63 A10 SR
76 CB 125 Honda
76 FLH
2012 FLHTP
Re: Timing A10 BSA [Re: Red Lapierre] #441642
06/23/12 8:30 pm
06/23/12 8:30 pm
Joined: Feb 2010
Posts: 383
Upstate NY
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Red Lapierre Offline OP
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I check timing on cam and crank reset it. I pulled mag and clean all the brass up and put it back together and retimed mag and now she rumble and pops like it want to start.I think she is flooding or my timing off a little but I have made progess.

If I attach a degree wheel what degree do I want it to fire at BTC????

Thanks for the help.


57 A10 GF
61 A7
61 A10 GF
63 A10 SR
76 CB 125 Honda
76 FLH
2012 FLHTP
Re: Timing A10 BSA [Re: Red Lapierre] #441766
06/24/12 9:17 pm
06/24/12 9:17 pm
Joined: Jul 2006
Posts: 894
newcastle australia
trevinoz Offline
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It seems generally that the best results are achieved with an advance of 32 degrees which is about 5/16" BTDC.
The factory figures are way too far advanced, especially the late A10 figure of 13/32".

Re: Timing A10 BSA [Re: Red Lapierre] #441787
06/25/12 12:43 am
06/25/12 12:43 am
Joined: Feb 2010
Posts: 383
Upstate NY
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Red Lapierre Offline OP
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I got it to fire for a bit (1 minute or so several times now) I have tried several carbs get same results. All the carbs are pieces put together.
Seem to run but when I twist throtle she dies out. I have AMAL 389 (with about 1 1/8" open) it calls for 376.
240 main jet, needle position 3, no choke
I have 2 different size needle 1 is 3 3/4" long and 1 is 4 1/8" long so I might have the wrong needle in it. I have looked at AMAL charts but no info on lenght of needles.
Thanks for the help. I'm getting closer.


57 A10 GF
61 A7
61 A10 GF
63 A10 SR
76 CB 125 Honda
76 FLH
2012 FLHTP
Re: Timing A10 BSA [Re: Red Lapierre] #441790
06/25/12 1:11 am
06/25/12 1:11 am
Joined: Sep 2006
Posts: 398
hamilton on. can.
H
highway Offline
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hamilton on. can.
It might be faster and easier just to borrow a Concentric from a running bike. doesn't matter what size, just that idled and took throttle. If it cures the problem, you then fix your carb. if not it's back to the grind.

Last edited by highway; 06/25/12 1:11 am.
Re: Timing A10 BSA [Re: Red Lapierre] #441838
06/25/12 9:40 am
06/25/12 9:40 am
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Posts: 383
Upstate NY
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Red Lapierre Offline OP
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It has a 3.5 slide in it. I will look to see what I have, got a 3 not sure if I have 2.5 so I will try that.


It seems generally that the best results are achieved with an advance of 32 degrees which is about 5/16" BTDC.
The factory figures are way too far advanced, especially the late A10 figure of 13/32".

I will retime your way Trevinoz


Thanks


57 A10 GF
61 A7
61 A10 GF
63 A10 SR
76 CB 125 Honda
76 FLH
2012 FLHTP
Re: Timing A10 BSA [Re: Red Lapierre] #444272
07/12/12 1:33 am
07/12/12 1:33 am
Joined: Feb 2010
Posts: 383
Upstate NY
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Red Lapierre Offline OP
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I have try everything. But I can only get it to rumble but not run. It starts almost every kick but short rumble and that it.
Fitted a new AMAL 1 5/32 with 310 main jet, 25 pilot, no 3 slide. .106 needle jet and have try needle in 2 and 3 position.
Rechecked the motor timing and the mag timing.
Please help!

Thanks
Red


57 A10 GF
61 A7
61 A10 GF
63 A10 SR
76 CB 125 Honda
76 FLH
2012 FLHTP
Re: Timing A10 BSA [Re: Red Lapierre] #444326
07/12/12 1:33 pm
07/12/12 1:33 pm
Joined: Jun 2005
Posts: 96
montreal
J
johnnie690 Offline
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montreal
Red; on a recent posting you mention different length needles the AMAL 389 takes a "D" needle (the longest) look at the top of the needle above the grooves and you should see a stamping identifying the type... "D" is what you want in a 389.
Also try to run the bike with the fuel tank cap off or open ,maybe you have a venting problem and the fuel isn't flowing to the carb freely.The set up you mention above is pretty standard for an A10.In mine I use a 30 pilot,but what you have should work at least to get it running.also are you trying to start with the carb "tickled",and the choke on ???? It certainly sounds like there isn't enough fuel to support running.

Re: Timing A10 BSA [Re: Red Lapierre] #444358
07/12/12 4:51 pm
07/12/12 4:51 pm
Joined: Jun 2005
Posts: 96
montreal
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johnnie690 Offline
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montreal
In addition to my previous post.The most important setting on any carb before you do any adjustment is the float level.On the AMAL Monobloc the level of fuel should be up to the pip or nub on the float cover .

Re: Timing A10 BSA [Re: Red Lapierre] #444413
07/12/12 10:55 pm
07/12/12 10:55 pm
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Posts: 383
Upstate NY
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Red Lapierre Offline OP
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I going to put a clear gas line to see if the flow is there. Yes I have been tickled it but no on the choke but I do have it but didn't have the right cable to put on so I plugged the hole for the cable. I'm going to make a cable to fit the choke on.
It seem funny that it won't start on ether. But will fire over on gas.


57 A10 GF
61 A7
61 A10 GF
63 A10 SR
76 CB 125 Honda
76 FLH
2012 FLHTP
Re: Timing A10 BSA [Re: Red Lapierre] #445429
07/20/12 1:30 am
07/20/12 1:30 am
Joined: Feb 2010
Posts: 383
Upstate NY
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Red Lapierre Offline OP
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Still no luck.
Question if when kicking the kick starter and the primary side of the crank rolls in a counter clockward direction to set before tdc I would go back in a clockward correct? It has compression it has spark and gas. So my issue is timing.
Thanks


57 A10 GF
61 A7
61 A10 GF
63 A10 SR
76 CB 125 Honda
76 FLH
2012 FLHTP
Re: Timing A10 BSA [Re: Red Lapierre] #445434
07/20/12 2:59 am
07/20/12 2:59 am
Joined: Feb 2008
Posts: 4,359
New Jersey USA
Tridentman Offline

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Yes--get TDC then for the timing point turn the engine backwards (clockwise from the primary side) for the correct amount for the timing point BTDC.
Remember to set the AAU in the fully advanced position or if manual advance/retard set the lever in the fully advanced position.
HTH

Re: Timing A10 BSA [Re: Red Lapierre] #445503
07/20/12 9:09 pm
07/20/12 9:09 pm
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Posts: 383
Upstate NY
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Red Lapierre Offline OP
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Upstate NY
I runs I was timing after TDC . I tap the crank shaft put degree wheel on and notice direction and when timing by inches before I was going the other way. (fun getting old I own this one for 40+ years)

Thanks to all that posted.

Now there is no oil returning to tank. I have notice a lot of oil in the oil pump cavity so it might not be seated correctly.
If I was to buy a new one what's a good brand??

Thanks again Red


57 A10 GF
61 A7
61 A10 GF
63 A10 SR
76 CB 125 Honda
76 FLH
2012 FLHTP
Re: Timing A10 BSA [Re: Red Lapierre] #445532
07/21/12 1:54 am
07/21/12 1:54 am
Joined: Feb 2010
Posts: 383
Upstate NY
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Red Lapierre Offline OP
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Red Lapierre  Offline OP
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Upstate NY
Will do.
But right now Jack Daniel's Tennessee Honey is on the table. Because She runs I have spent a month of thinking what the hell am I doing wrong. The degree wheel showed me.

Thanks


57 A10 GF
61 A7
61 A10 GF
63 A10 SR
76 CB 125 Honda
76 FLH
2012 FLHTP

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