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Timing a Boyer

 
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Philippe
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PostPosted: Wed Sep 01, 2004 6:31 am    Post subject: Timing a Boyer Reply with quote

I cannot find in my notes what's the best timing for a non digital boyer on a 850 MK2.
Anyone has this number ready? (wih the timing marks and with the piston position).
Thank you
Philippe
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norbsa48503



Joined: 07 Apr 2004
Posts: 995
Location: Flint, Michigan

PostPosted: Wed Sep 01, 2004 7:00 am    Post subject: Reply with quote

Thirty one Degrees BTDC Points are 28 degrees. You can play with up to 35 degrees if you like fast. The static setting for Boyers is done at TDC but the required light timming is strobed at 31 typical. I have made sure of the mark on my rotor relitive to the gadge lines inside the primary cover and found them to be about 3 degree inacurate this is done with a dead stop tool and a degree wheel and is worth your time. So when my line says 34 degrees it's at 31 degrees. These bikes will run way out of time but having it right sure helps with all other systems. norbsa
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PostPosted: Wed Sep 01, 2004 7:47 am    Post subject: Reply with quote

That should be 31 degrees at 5000 RPM. And it is imperitive that you verify that your timing mark on the alternator is correct with respect to the degree indication on the fitting attached to the primary cover. I have seen these off as much as 12 degrees.

Randy
64 Featherlastic
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nortonfan



Joined: 24 Dec 2003
Posts: 362
Location: Brisbane, Australia

PostPosted: Wed Sep 01, 2004 11:50 am    Post subject: Boyers Reply with quote

Philipe,

I see the question has been answered but here is a link to Old Britts that could be usefull to owners of Boyers.

http://www.britcycle.com/Manuals/BoyerTroubleShooting.htm
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illf8ed



Joined: 30 Dec 2003
Posts: 472

PostPosted: Wed Sep 01, 2004 11:55 am    Post subject: Boyer timing Reply with quote

Randy,

If an alternator rotor timing mark is off by 12 degrees the center has likely separated from the magnet and spun. This is common on the non welded rotors that were put on the 750s.
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PostPosted: Wed Sep 01, 2004 12:32 pm    Post subject: Reply with quote

Interesting thought. There was no indication of an alternator rotor problem on the ones I checked, but I suppose the rotor outer ring could creep around the center hub without causing a catastrophic failure. Is this a press fit? At any rate, every Norton owner should do a degree wheel check of the rotor mark once before performing a strobe timing of the bike and again any time the rotor or outer cover is replaced. I have checked several for myself and friends, and all have been off by at least 3 degrees. My own was off 7 degrees.

Randy
64 Featherlastic
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nortonfan



Joined: 24 Dec 2003
Posts: 362
Location: Brisbane, Australia

PostPosted: Wed Sep 01, 2004 1:00 pm    Post subject: Timing Marks Reply with quote

If any of you have had experience with 351 cleveland motors, they will do it also(rotor slip/harmonic balancer outer ring). A lot of engines no doubt have the same problem.

This type of problem cropped up years back for me now.
Not knowing what was the problem at first(23 years ago), I left it with "professionals" for a day. I had timed the engine by ear, that is, lettting it ping & then backing it off until it didn't ping. They charged me without finding the problem themselves.

They checked everything else but..............

Having a top dead centre tool was how I found the problem later that night. The "outer ring" had moved by 17 degrees.

So, I guess the moral is...do not trust timing marks...they should be checked with the correct tool/s.
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The Unapproachable Norton Commando

At the end of 1967 the Norton Commando was announced.

The Norton Commando was greeted with a certain amount of scepticism because on first sight the commando appeared to comprise of the old Norton Dominator twin cylinder engine mounted at an inclined angle in a set of new cylinder parts.

It was not realized that the new Norton Commando Isolastic method of engine suspension damped out all engine vibration and produced a machine which had uncanny smoothness for a vertical twin. In due course the critics were silenced and the Norton Commando had the distinction of being regarded as the first of todays so called superbikes. There can be little doubt that the original design concept of the Norton Commando has proved correct, since comparatively few modifications of any real consequence have been made since production commenced during 1968.

Now nearly 40 years later Norton Commando riders like us are a breed of our own, and as far as we are concerned its still more fun to go for a blat on the old Norton Commando, and fast. As a Norton Commando owner and enthusiast, my goal here is to promote and give credit to those who keep the Norton name going.

It is more deserving to give credit to the Commando itself, for after all these years it continues to be respected. The original Commando designers like John Favill are those who deserve the credit for developing this incredible motorcycle.

The Norton Commando Roadster and Interstate of the late seventies, never died. Although the Norton Villiers factory dispersed the tradition lived on. Today Kenny Dreer in the USA is developing the new 952 CC Norton. What a great looking bike this is, and its engineering is still based on the original layout. It will be interesting to see how the new 952CC Norton does in todays tough motorcycle market. One thing is for sure, I would own one if I could afford it.