earshave rejet stumbling hesitating 3-4k rpms - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 1 (permalink) Old 09-12-2009, 08:52 AM Thread Starter
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earshave rejet stumbling hesitating 3-4k rpms

Hello all,

(Especially Krebsne, because I think you have had the same problem).

I had done an earshave on the "parts bike" but she became my full time bike when Bess fried her stator.

On the "parts bike" I was loving the rejet power, but had been experiencing a stumbling between 3-4 on the tach. The bike would kind of hesitate and slightly lurch (almost as if you were driving into an intermittent headwind) at cruising speed. Basically it was 3-4 on the tach in the two top gears. Anything else was fine, including slowly accelerating or decelerating through the bad band on the tach.

Last night I "fixed" the stumble by doing one of two things (I should have done them one at a time). I backed out the air fuel mix from 3.5 to 4 full turns. I also retightened the boots.

I think it was the boots - and here's why.

One thing I noticed about the boots was that the stock fasteners had a tendency to slip "up" the boots, or away from outermost part of the boot towards the middle. So I used a small dab of silicon as "glue" to keep the Boot-to-Engine fasteners as close to the engine as I could, and the Boot-to-Carb fasteners as close to the carbs as I could. Then I tightened them and they stayed in place without slipping. For whatever reason, they tightened up Much more snugly (that is to say I had to stop turning the screw much sooner).

Now, the stumble appears to be gone.

So if you have a post carb work stumble, I'd advise looking at the boots again, even if they seem securely fastened or tight (because mine initially did).

'86 VN750
MF Battery, Iridium Plugs, RR relocated, Voltmeter, 170/80/15 Kenda Kruz rear tire, DIY Samsonite hard bags, DIY shaved seat with Beaded seat pad ('cause that's how I roll) and the dreaded STATOR CHANGE.

Shining Black Bess '86 VN750, retired for parts after a fried stator and being knocked (kee-runch) in her parking spot.
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