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Hello everyone,
First off, let me thank everyone here for a GREAT forum. What a wealth of information!
Now, on to the fun stuff - I have a 1980 gs450L that runs very well except for one issue. When the bike is cold (and sometimes at operating temp), I will close the choke a bit, then go ahead and give it throttle, then let off. The engine will continue to rev for a short period, then return to what would be a bit above idle speed. I'll then open the choke a bit, and repeat. It seems almost like the throttle is "stuck" for a little bit (I add the quotes because I really don't think it's a problem with the throttle, it just seems that's the best way to describe it). This process will continue until the bike is up to operating temp and the choke is just about all the way open, and even then the throttle will seem to "stick" a little (but not nearly as drastic as when cold). The thing is, the throttle cable is fine and I don't notice any of the mechanical parts sticking or anything. I haven't looked too deeply into the problem, as it didn't really affect the driveability of the bike last summer (when I bought it), but now it's annoying and I'd like to figure this thing out. I used to be an auto mechanic, but this is my first time dealing with bikes, so I'd love a little input.
BTW - the bike is in neutral for all this - when I put it in gear and go while the engine is still a bit cold, the revs will drop to where they should be, but when I engage the clutch, they will go back up for a bit, then come down.
Any takers?
First off, let me thank everyone here for a GREAT forum. What a wealth of information!
Now, on to the fun stuff - I have a 1980 gs450L that runs very well except for one issue. When the bike is cold (and sometimes at operating temp), I will close the choke a bit, then go ahead and give it throttle, then let off. The engine will continue to rev for a short period, then return to what would be a bit above idle speed. I'll then open the choke a bit, and repeat. It seems almost like the throttle is "stuck" for a little bit (I add the quotes because I really don't think it's a problem with the throttle, it just seems that's the best way to describe it). This process will continue until the bike is up to operating temp and the choke is just about all the way open, and even then the throttle will seem to "stick" a little (but not nearly as drastic as when cold). The thing is, the throttle cable is fine and I don't notice any of the mechanical parts sticking or anything. I haven't looked too deeply into the problem, as it didn't really affect the driveability of the bike last summer (when I bought it), but now it's annoying and I'd like to figure this thing out. I used to be an auto mechanic, but this is my first time dealing with bikes, so I'd love a little input.
BTW - the bike is in neutral for all this - when I put it in gear and go while the engine is still a bit cold, the revs will drop to where they should be, but when I engage the clutch, they will go back up for a bit, then come down.
Any takers?
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