Boyer Ignition Vs. Tri Spark?
- Thread starter teddy boy
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teddy boy said:
There is a Boyer fitted to my bike at present, but it looks in a sorry state so thinking of replaccing....just in case; looking through the site there are many comments re the Tri-Spark with the vast majority praising it. I also have a Boyer Power box fitted which is good and a Boyer M3 fitted to my A65 L/C, they have given good service, but I think on advice and comments from other owners of Commandos the Tri-Spark is the one to have for the Commando, although a bit dearer than the Pazon and Boyer, it seems to tick all the boxes, good starting, tick over etc. I'm going to bite the bullet and buy one in the next week or two.
Robert
tri-spark
hey teddy boy just installed tri-spark on my 75 850 mk111 .installation was easy .steve kelly at tri-spark great if you have any questions.yes pricey yes takes awhile to order haven't fired it up yet but the one on my 75 trident works great.I'll let you know when i fire her up. New carbs cables sparxs alt. and reg. new battery new wiring harness.h/t leads plugs etc. etc. ouch.Got two boyers you can have.I think the big thing is getting the wiring straight both my bikes were in need of a eletrical doctor both had boyers like to start on the button.good luck m.c.1011
hey teddy boy just installed tri-spark on my 75 850 mk111 .installation was easy .steve kelly at tri-spark great if you have any questions.yes pricey yes takes awhile to order haven't fired it up yet but the one on my 75 trident works great.I'll let you know when i fire her up. New carbs cables sparxs alt. and reg. new battery new wiring harness.h/t leads plugs etc. etc. ouch.Got two boyers you can have.I think the big thing is getting the wiring straight both my bikes were in need of a eletrical doctor both had boyers like to start on the button.good luck m.c.1011
have a look at the Pazon - the tri spark is some nice kit - but the cost isnt very competitive for the twins. the Boyer has a more voracious apetite for power at idle than the Pazon unit and the advance curve is very linear - something you might not notice on the street mind you - but the curve on the pazon is correct for your norton - have a look.
cheers . Marc
cheers . Marc
Pazon
Hi Marc: thanks. I read all the forum posts and the website for the Pazon: good price. Cheaper than the Boyer. Are you using the Pazon?
Am I correct it fires both cylinders at once, like the Boyer? T
herefore the dreaded kickback is still possible.
I had one kick back, and hobbled around for 3 days afterwards.
The Tri Spark seems to eliminate that issue as it fires one cylinder at a time. Some good reviews from T160 riders on this unit.
Not sure of the Commando performance with this unit; any comments.?Teddy Boy
Norvin said:
Hi Marc: thanks. I read all the forum posts and the website for the Pazon: good price. Cheaper than the Boyer. Are you using the Pazon?
Am I correct it fires both cylinders at once, like the Boyer? T
herefore the dreaded kickback is still possible.
I had one kick back, and hobbled around for 3 days afterwards.
The Tri Spark seems to eliminate that issue as it fires one cylinder at a time. Some good reviews from T160 riders on this unit.
Not sure of the Commando performance with this unit; any comments.?Teddy Boy
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Re: Pazon
With any wasted spark system you get a spark at both plugs at the same time, however it cannot fire both cylinders at once, as each cylinder fires one crankshaft revolution apart in a 360° twin cylinder four stroke engine.
Only one cylinder can fire at any one time, so there's no difference between a "wasted spark" or a "sequential" system regarding kickbacks.
The NEW Tri-Spark twin cylinder system available today is the "Classic Twin" ignition, and that is a wasted spark system which has been specifically designed to prevent kickbacks.
The Classic Twin system should not be confused with the original sequential triple and twin cylinder Tri-Spark systems that have a box.
The Tri-Spark twin cylinder sequential system is no longer available, as far as I know?
teddy boy said:
With any wasted spark system you get a spark at both plugs at the same time, however it cannot fire both cylinders at once, as each cylinder fires one crankshaft revolution apart in a 360° twin cylinder four stroke engine.
teddy boy said:
Only one cylinder can fire at any one time, so there's no difference between a "wasted spark" or a "sequential" system regarding kickbacks.
The NEW Tri-Spark twin cylinder system available today is the "Classic Twin" ignition, and that is a wasted spark system which has been specifically designed to prevent kickbacks.
The Classic Twin system should not be confused with the original sequential triple and twin cylinder Tri-Spark systems that have a box.
The Tri-Spark twin cylinder sequential system is no longer available, as far as I know?
Re: Pazon
Hi L.A.B.
I am looking at getting the Tri-Spark Classic Twin, and noticed that LP Williams stock Tri-Spark in the UK but they are closed until the 12th of Jan, I looked up Triple cycles as I read somewhere that they stocked them but their phone number was unobtainable, does anyone else stock Tri-spark in the UK? I know I can order direct but thought it might be easier buying in the UK.
L.A.B. said:
Hi L.A.B.
I am looking at getting the Tri-Spark Classic Twin, and noticed that LP Williams stock Tri-Spark in the UK but they are closed until the 12th of Jan, I looked up Triple cycles as I read somewhere that they stocked them but their phone number was unobtainable, does anyone else stock Tri-spark in the UK? I know I can order direct but thought it might be easier buying in the UK.
cash said:
I think it's because of the built in randomness of the sparks of the Boyers at low speed :wink: . The Boyer also has a cut off circuit which disconnects the output stage when the motor is not turning to prevent the unit from burning up and also as side benefits to protect the coil from burning up and the battery from draining flat, when the Boyer cuts off, it will generate a spark, if the mixture is correct, there will be a kick back if the engine is in the right position.
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Jean,
The Micro-Digitals don't spark when switched off, none-the-less, it could be when the crank stops turning backwards it must stop the correct position to give the Boyer the signal and the motor fires up, but that signal is before top dead :?
My mate had a coil ignition C11G that would self start, we all thought it was possessed. Turned out it was just a well built motor and an early Lucas coil ignition that would spark when switched on.
All the best for the New Year.
Cash
The Micro-Digitals don't spark when switched off, none-the-less, it could be when the crank stops turning backwards it must stop the correct position to give the Boyer the signal and the motor fires up, but that signal is before top dead :?
My mate had a coil ignition C11G that would self start, we all thought it was possessed. Turned out it was just a well built motor and an early Lucas coil ignition that would spark when switched on.
All the best for the New Year.
Cash
grandpaul
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I always thought a clever lad could tune an engine to self-start on an "electronic ignition-on spark", if he set it all up correctly and had low enough compression to start real easily, yet run acceptably.
I'd LOVE to have a Norton like that!
I'd LOVE to have a Norton like that!
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hi cash looks like the last 2 posts think you,re joking but i think it could be possible my atlas vintage racer fitted with a mag replacement kit (mistral) which uses the wasted spark system often tried to fire up when the ignition was switched on (depending where the pistons were at the time) sometimes i would get a bumph out of the exaust sometimes nothing sometimes it would kick back and spit out of a carb.another phenomenon i had was when i bought a new rd 400 in 79 (cough.cough) after i had washed it and hosed it down i used to start it up (like ya do) and one day after a few blips of throttle the rev counter needle dropped to zero but the engine was still running but with a slightly different exaust note i thought the rev counter had packed up but it had,nt the engine had started to run in reverse to prove my theory i put it in gear and let the clutch out slowly and sure enough it set off backwards has anyone else experienced this with a 2 stroke
ntst8
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chris plant said:
Haven't seen it but have heard tales of old trials 2 strokes which if you got things wrong and managed to roll back downhiil and could fire up in the wrong direction - so that a bit throttle to get you out of trouble would only increase the pain. :shock:
Was never sure whether to believe or not.
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