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GL1500 hesitation when accelerating, all gears

8179 Views 13 Replies 13 Participants Last post by  logos95

I do have off-idle hesitation problem, but also hesitation in higher speeds. Actually, when ever I try to accelerate fast, there's a little time before anything happens and there is noticeable hesitation.
But, if I accelerate heavy, 1st of 2nd gear and continue accelerating through gears (to high rev) there's no hesitation. And I think, that I have mileage ok and after all as much power as there should be.

I read a post about vacuum error, not leak but there is a hose that goes "stuck", I mean that there is actually loss of vacuum. Just can't find it now.

If I release throttle a bit, hesitation isn't that noticeable.

I clear this out more, if I try to overtake a car, I'll have to throttle very gently at beginning, wait a while when the acceleration begins and then twist more.

Suggestions where to begin? Is it very hard to replace all vacuum lines?

Bike is -88 and has now 200k kilometeris in it, so I'm wondering if to leave like it is and ride peacefully, or try to fix this.
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Big job

Carbs off then? Is it a day, two or one weeks job? Anything special to buy before starting, gaskets or so?

Have spent the last few days getting my bike back together, as I just changed out the ignition coils - carbs have to come out for that. I had (Have? Still have to test drive it) a problem with my bike smoothly sagging and losing power. I pulled my carbs and had 'em checked out - diaphragms were good (no pinhole leaks or tears). Just got it back together and ran it - seems good and I'll be ready for a test drive soon enough. Found this guide very useful:
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