I have a 94 Suzuki DR125SE. On idle it revs higher and higher gradually on its own. Also, when I open and close throttle it stays at high rev and takes forever to come down. I have checked the throttle cable, boots for vacuum leaks, adjusted the air/fuel screw on the carb, even changed carb to a totally new one and the problem still exists. The spark plug is black so I assume it's running rich. However, playing with the carb didn't seem to fix anything. It starts just fine.
I have not looked at valve clearance yet but not sure if it's got anything to do with this.
Any advice is appreciated
Rev goes high gradually on idle and stays high
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BikerGran
- Gran Turismo
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Re: Rev goes high gradually on idle and stays high
When you say you've checked the throttle cable, what exactly have you checked? I had this problem on my Kwak GT550 and I lubed the throttle cable which made no difference. It turned out to be the linkages and return spring gummed up with old oil and dirt. Cleaned it up with a degreaser and a brush, put fresh light oil on it, solved the problem.
The tragedy of old age is not that one is old, but that one is young.
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Shebee
- Track Day Addict
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Re: Rev goes high gradually on idle and stays high
Does it have a choke? Running rich would be a symptom of choke on?
There is only one way of life and that's your own.
Re: Rev goes high gradually on idle and stays high
Check the air filter/housing for obstructions
Has the end can been messed with as a lack of baffles enriches the mixture
Has the end can been messed with as a lack of baffles enriches the mixture
Cleverly disguised as an adult !
Re: Rev goes high gradually on idle and stays high
Similar happened to me on my Hypermotard.BikerGran wrote: ↑Thu May 28, 2020 10:47 pmWhen you say you've checked the throttle cable, what exactly have you checked? I had this problem on my Kwak GT550 and I lubed the throttle cable which made no difference. It turned out to be the linkages and return spring gummed up with old oil and dirt. Cleaned it up with a degreaser and a brush, put fresh light oil on it, solved the problem.