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Classic, Vintage & Veteran For Coventry and Meriden Models. Anything pre-Hinckley goes.

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Old 12-08-2012, 04:57 AM   #31 (permalink)
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Originally Posted by Kem770 View Post
It has a magneto.

Kem
Then forget the wiring diagram!

Did it ever run right with you?

Check the points gap on both lobes of the ring cam. Page 165-on in this manual.
http://classicbike.biz/Triumph/Repai...umphRepair.pdf. The usual cause of them going onto one cylinder, in service, is an owner neglecting to check and adjust the points, so they stop opening. One side always stops opening first. If it's a bike coming out of storage, or newly refurbished, suspect more serious magneto problems, but if it's firing well on one cylinder but not at all on the other, it may be a simple points or cam issue. Does the other cylinder chime in if you rev up?

Are the HT leads attached to the mag pickups? Are the pickups damp or dirty, inside our outside the magneto? Are both pickup brushes in place?
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Old 12-08-2012, 05:00 AM   #32 (permalink)
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That's on my list for Sunday. I noticed when I tickle the carb I no longer get fuel on my finger.


Kem
Just noticed this. Is there fuel in the tank?

There's usually a gauze on the tap, protruding up into the tank. It gets blocked. There'll be another strainer where the pipe goes into the carburettor.
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Old 12-08-2012, 11:45 AM   #33 (permalink)
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Originally Posted by Triton Thrasher View Post
Just noticed this. Is there fuel in the tank?

There's usually a gauze on the tap, protruding up into the tank. It gets blocked. There'll be another strainer where the pipe goes into the carburettor.

Yes, there is fuel in the tank.

Yes, it was running fine before it stalled on the side of the road. I can get it started on the first or second kick and it runs okay on the one cylinder.

Kem
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Old 12-08-2012, 01:48 PM   #34 (permalink)
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Yes, there is fuel in the tank.

Yes, it was running fine before it stalled on the side of the road. I can get it started on the first or second kick and it runs okay on the one cylinder.

Kem
But, is the fuel flowing out of the tank, into and through the carb? You need to check for any blockage in the system.
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Old 12-08-2012, 04:20 PM   #35 (permalink)
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But, is the fuel flowing out of the tank, into and through the carb? You need to check for any blockage in the system.

I'm checking this tomorrow because I'm wondering if the screen is clogged.

Kem
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Old 12-09-2012, 09:11 PM   #36 (permalink)
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Since the wind child today was -4, I didn't troubleshoot the bike today. I hope I can get to it on Tuesday.

Kem
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Old 12-09-2012, 11:14 PM   #37 (permalink)
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Since the wind child today was -4, I didn't troubleshoot the bike today. I hope I can get to it on Tuesday.

Kem
Right, winter certainly has a demotivating effect on anything to do with motorcycling whether riding or wrenching.
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Old 12-11-2012, 06:02 PM   #38 (permalink)
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I ordered new spark plug wires from Baxter today, so I'll probably have them tomorrow. Yesterday I changed the spark plugs and checked the fuel flow.

Kem
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Old 12-15-2012, 07:19 PM   #39 (permalink)
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Because of Christmas, I haven't had time to work on my bike. My wife seems to think I need to be decorating our home and shopping. I disagree and think I need to be working on my bike. For anyone married I'm sure you know who won out.

I did get the new spark plug wires this week but they are for a Lucas mag not a BTH. Randy Baxter says I can take my old plug wires and new plug wires and move the mag end of the old wires to the new wires.

Has anyone here done this? It seems like it should work.

Also, I pulled one of the old wires off tonight and noticed oil on the ferrite tip, so I stuck my finger in the hole and it came out oily. This can't be right.

I'm done shopping, so I'm in the shed tomorrow.

Kem
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Old 12-16-2012, 03:34 AM   #40 (permalink)
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Quote:
Originally Posted by Kem770 View Post
Because of Christmas, I haven't had time to work on my bike. My wife seems to think I need to be decorating our home and shopping. I disagree and think I need to be working on my bike. For anyone married I'm sure you know who won out.

I did get the new spark plug wires this week but they are for a Lucas mag not a BTH. Randy Baxter says I can take my old plug wires and new plug wires and move the mag end of the old wires to the new wires.

Has anyone here done this? It seems like it should work.

Also, I pulled one of the old wires off tonight and noticed oil on the ferrite tip, so I stuck my finger in the hole and it came out oily. This can't be right.

I'm done shopping, so I'm in the shed tomorrow.

Kem
So it's an old BTH magneto?

What is a "ferrite tip?" Do you mean the carbon HT pickup brush? It should not be oily. Clean both of them in petrol. Clean the slip ring (thing inside the magneto that they rub on), with petrol on a rag. Hold the rag against the slip ring with a stick and spin the engine. Short circuit the kill switch terminal to earth while doing that, to avoid 5000 volts up your arm.
The oil seal at the drive end of the magneto may be leaking and letting engine oil into the magneto. If cleaning the brushes and slip ring helps your problem but not for long, the seal, the bearings and bearing insulators may need attention.

Of course you are supposed to fit new HT leads (wires) into the pickups the same way the old ones are fitted.

There is probably an earth brush somewhere under a screwed cover on the outside of the magneto. It wears and gets dirty too.
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