My 75 GT750 had been running great until it recently developed over a slow period of time a cutting out of ignition at low RPM. It runs great above about 2500 RPM but when it goes back to idle you can tell it is cutting out ignition wise, It's not fuel because it's like a light switch on/off cutout. It seems to be on 1 or 2 cylinders. It could be something as easy as spark plugs or worn points; I have not investigated yet. It could be a slight grounding of something? But it runs spot on when you "Give er the beans." So before I unessasarly tear into this, is it a common problem that I am unaware of? Thoughts?
Thanks in advance as always,
Sky
Low RPM ignition issue???
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- PaulD738
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Re: Low RPM ignition issue???
My T500 has recently had a similar problem which turned out to be one set of points closing up. I reset them and checked the timing and all’s back to normal.
They're rubbish them Jap bikes lad they won't last five minutes! you want to get yourself a nice Royal Enfield!
A quote from my old dad
I started out with nothing and I’ve got most of it left!
A quote from my old dad
I started out with nothing and I’ve got most of it left!
- Alan H
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Re: Low RPM ignition issue???
Check the battery voltage and voltage at the orange wire at the coils.
You get poor sparks if the voltage to the coils is low and that will cause poor running especially at low revs.
You get poor sparks if the voltage to the coils is low and that will cause poor running especially at low revs.
Proof that four strokes are over complicated
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Re: Low RPM ignition issue???
Well that solved it!
Thanks so much for the advice. The left points were not opening. Strange that this would happen. But problem solved!
Thanks again,
Sky
- PaulD738
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Re: Low RPM ignition issue???
If you’ve fitted new points to the bike the heel of the moving side that runs on the cam tends to wear until it work hardens. Original Suzuki contact sets seem to be better in that respect than the pattern ones available now. Glad you sorted it
They're rubbish them Jap bikes lad they won't last five minutes! you want to get yourself a nice Royal Enfield!
A quote from my old dad
I started out with nothing and I’ve got most of it left!
A quote from my old dad
I started out with nothing and I’ve got most of it left!
- mizzytheman
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Re: Low RPM ignition issue???
I always put a little smear of grease on the points cam and a few drops of oil on the felt pad. I do this every year when the bike goes back on the road after winter. Haven’t had to adjust the points for over 5 years.
- Alan H
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Re: Low RPM ignition issue???
Probably gets someone else to do it.
Proof that four strokes are over complicated
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Re: Low RPM ignition issue???
Hi had exactly same problem on centre cylinder on my kettle points not opening ,found points spring strap gone soft could bend it with my fingers fitted new points been fine ever since .