Kdx220 stops increasing rpm at 1/2 throttle - kips issue

This area is for KDX 200 H series part numbers etc...
tmosely1
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Re: Kdx220 stops increasing rpm at 1/2 throttle - kips issue

Post by tmosely1 » 08:48 pm Apr 14 2019

Two things I noticed... The rod is slightly bent... And the arm on the actuator for the governor is not rigid. There's 5 -10 degrees of movement. Is the movement normal? Or is that supposed to be rigid?
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bufftester
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Re: Kdx220 stops increasing rpm at 1/2 throttle - kips issue

Post by bufftester » 05:13 pm Apr 15 2019

Yes, if replated check your KIPS valve bores and clean them up, but I don't see anywhere where you mention replating. The OEM washers are 1.0 mm thick each so yours look to be correct. How are you actuating the KIPS valves? by hand? motor running? If by hand do you have the pawl arm unbolted from the actuator shaft?
That shaft should not be bent, may be causing some drag on the opening and closing, and the pin should definitely NOT be loose. I think you are looking in the wrong place. The KIPS valve is opened and closed by the governor in the right case half, if it's not returning something is wrong with the governor. Regardless, a fully open KIPS valve wouldn't keep you from going over half throttle...2 different issues.

tmosely1
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Re: Kdx220 stops increasing rpm at 1/2 throttle - kips issue

Post by tmosely1 » 07:16 pm Apr 15 2019

bufftester wrote:
05:13 pm Apr 15 2019
Yes, if replated check your KIPS valve bores and clean them up, but I don't see anywhere where you mention replating. The OEM washers are 1.0 mm thick each so yours look to be correct. How are you actuating the KIPS valves? by hand? motor running? If by hand do you have the pawl arm unbolted from the actuator shaft?
That shaft should not be bent, may be causing some drag on the opening and closing, and the pin should definitely NOT be loose. I think you are looking in the wrong place. The KIPS valve is opened and closed by the governor in the right case half, if it's not returning something is wrong with the governor. Regardless, a fully open KIPS valve wouldn't keep you from going over half throttle...2 different issues.
No replate.. It measured in spec with a new set of rings and a new piston. The shaft was definitely bent and trying to straighten it was unsuccessful.. So I have a new shaft, arm, and base gasket on order that will be here Thursday. The govener is checked, straight, an freely moving. I believe with this shaft bent, it was multiplying the force required to move the valve.
I promise you guys that kips valve is glass smooth until we start applying pressure with the check ball and the force to move it is easily described as significantly increased. Possibly the previous owner lost the spring, or the ball was replaced and not correct. I'm going to work with what I have by adding a washer and observing the inspection port to confirm operation is better. If it is, I'm going to order some different springs and experiment.
I also watched the video where the gentleman talks about comparing a knock off carb to a sudoco. At the end of that video, he does a needle drop into the jet block test and talks about that depth equating to the clearance in the jet block. If his assumption is correct and that you can determine the wear on the bore, then my carb is toast. I have an email into mike at jetsrus about a replacement.

tmosely1
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Re: Kdx220 stops increasing rpm at 1/2 throttle - kips issue

Post by tmosely1 » 07:29 pm Apr 15 2019

Closer inspection on that arm.... Guessing the crack is not oem
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tmosely1
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Re: Kdx220 stops increasing rpm at 1/2 throttle - kips issue

Post by tmosely1 » 07:31 pm Apr 15 2019

im confident I'm at least 1/2 way to the problem

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