Author Topic: VM38 one float higher!  (Read 863 times)

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Offline John Orchard

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VM38 one float higher!
« on: October 19, 2018, 04:02:23 PM »
What am I not considering? The floats on my OEM Kawa VM38 live in the bowl and slide up & down on posts fastened to the bottom of the fuel bowl.

With bowl off the carb body, I filled the bowl with fuel, I wanted to take a measurement of where the lift-pins sit, that lift the arms that close the needle & seat, when the bowl is full of fuel.

One float sits about 3mm higher than the other, there is no liquid in the float, they are both the same size, they both have about 1.5mm clearance from the side-wall of the bowl.

I wonder if the uneven lift pressure on the needle & seat closing arms would effect smooth needle operation?

Ideas?  :-)
Johnny O - Tahition_Red factory rider.

Offline bazza

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Re: VM38 one float higher!
« Reply #1 on: October 20, 2018, 09:51:25 AM »
One of the posts bowl slides on not bent?
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Offline John Orchard

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Re: VM38 one float higher!
« Reply #2 on: October 20, 2018, 11:01:48 AM »
Nope, not bent. l wonder if a different internal air pressure? Or the plastic is thicker in one?

l have another old carb here, l checked the floats in it; equal, l'll run with it :-)
Johnny O - Tahition_Red factory rider.

Offline 80-85 husky

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Re: VM38 one float higher!
« Reply #3 on: October 20, 2018, 12:21:48 PM »
helium in one float, air in the other? set up for short circuit??  ;D ;D

Offline Curtis

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Re: VM38 one float higher!
« Reply #4 on: October 22, 2018, 10:18:48 AM »
Try weighing the floats?

Offline John Orchard

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Re: VM38 one float higher!
« Reply #5 on: October 22, 2018, 08:25:59 PM »
Try weighing the floats?


Good point :-)
Johnny O - Tahition_Red factory rider.

Offline Hoony

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Re: VM38 one float higher!
« Reply #6 on: October 23, 2018, 04:42:09 PM »
common on J O ...what is outcome  ;D
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Offline 80-85 husky

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Re: VM38 one float higher!
« Reply #7 on: October 23, 2018, 06:38:55 PM »
bathroom scales allready maxed out ;D ;D

Offline fred99999au

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Re: VM38 one float higher!
« Reply #8 on: October 23, 2018, 07:27:19 PM »
Funny, I have a mate with this affliction. Apparently one is atrophied. Still made two kids though

Offline John Orchard

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Re: VM38 one float higher!
« Reply #9 on: October 23, 2018, 08:45:24 PM »
common on J O ...what is outcome  ;D


Have not followed it up, I just switched to a pair that are equal  :-)
Johnny O - Tahition_Red factory rider.