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Where to place caliper on VM26SS Float ?

  • Thread starter Thread starter Tim
  • Start date Start date
T

Tim

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Anybody got a picture of a VM Carb Float being set with a caliper ? I want to make sure I'm putting the caliper in the correct position on the carb body to measure the float height.

Thanks !!!!
 
Ironic that you should post this question. I'm looking forward to hearing any other responses, especially in response to what I write. I've always measured from the gasket surface too, without the gasket in place. However, I looked at the factory service manual yesterday to get the spec for the floats on an '80 1000L. While I was at it, I happened to notice the picture included with the instructions. It shows the measurement taken from the ridge around the float bowl and not the gasket surface. The difference between those 2 surfaces is at least 2 mm. Wassup with that?
Willie
 
scan in your FSM page, or take a picture of it - we need to straighten this out once and for all.
 
Phew! That could be tuff. I don't have a scanner and I really doubt a picture would show the detail I mentioned. Hmmm. :-k
I'll see what I can do, if anything.
Willie
 
you know, come to think of it.. the mating surface is not the place most of us measured from.. it's actually the raised bump - because when the bowl is affixed to the body of the carburetor, it can not go any further than that ridge in terms of tightening it down.

It would make 100% sense to measure from the ridge, to the top (bottom) of the float to get our figure of 24mm. This may be why a lot of the search results on THIS very website return figures such as 25/26mm etc.

People were not measuring on the ridge, so they added a mm to make up for measuring the flat surface.

Still would be nice to see a photo of the actual FSM but that's hard to get.. all the online copies are low quality mega dark.
 
I think you may've misunderstood what I was referring to when I wrote "ridge". The surface shown in the FSM is not the raised bump but actually the raised edge that keeps the bowl aligned with the carb body. The bowl fits in this "perimeter".
Willie
 
floatheight.jpg


From the 77 FSM pdf.. which is why the quality sucks but you can see they are calling to measure from "below" the edge.

I suppose where you measure from, be it the raised ridge to seal the gasket, or the flat surface next to that it will still be with in the tolerated spec which is +/- 1

(This particula example was for a 32ss carb, so don't use that specs listed on this image this is just for reference..)

If willies happens to have a different way to measure, than I hope can get a picture up of that too.
 
willie said:
While I was at it, I happened to notice the picture included with the instructions. It shows the measurement taken from the ridge around the float bowl and not the gasket surface. The difference between those 2 surfaces is at least 2 mm. Wassup with that?
Click to expand...

79FiveFifty said:
you know, come to think of it.. the mating surface is not the place most of us measured from.. it's actually the raised bump - because when the bowl is affixed to the body of the carburetor, it can not go any further than that ridge in terms of tightening it down.

It would make 100% sense to measure from the ridge, to the top (bottom) of the float to get our figure of 24mm. This may be why a lot of the search results on THIS very website return figures such as 25/26mm etc.

People were not measuring on the ridge, so they added a mm to make up for measuring the flat surface.
Click to expand...
All of this just goes to show you why you really need to put the bowls on, turn the carbs over, put gas in them and measure the fuel level. :o

.
 
Steve said:
All of this just goes to show you why you really need to put the bowls on, turn the carbs over, put gas in them and measure the fuel level. :o

.
Click to expand...

True that.. all the FSM's show different terrible photos of how to get confused.. check this one out.

floatheight2.jpg
 
You are the man... measurement is taken over the raised edge and that confirms it.

thanks man, i was gonna pull my hair out soon if I didn't have a shaved head.
 
Ok, my next question is what is that tool being used in the picture ??? I have a caliper and it doesn't look like that !??!?!?!?
 
All of this just goes to show you why you really need to put the bowls on, turn the carbs over, put gas in them and measure the fuel level.
Click to expand...

Amen..:clap:
 
79FiveFifty said:
You are the man... measurement is taken over the raised edge and that confirms it. .
Click to expand...

I second that! Thanks Tim!! The picture I mentioned in my FSM is somewhat similar to the one you posted. It definitely shows the spec being from the top of the ridge to the top of the float. Now, keeping in mind the effect of float level on performance and the possibility that there can be typos both in text and pictures......it leaves one to believe, and as previously posted, that measuring float level really is the only way to go, but, man, whata pita!
Thanks to all the respondents. I had a feeling there'd be a few weighing in on this topic. ;)
Willie
 
That's why it says to measure without the gasket. You are measuring from the little ledge where the gasket sits.
 
It looks like the tip of the caliper is suppose to rest where the gasket does. The lines that are super imposed on the picture look a little mis-leading because it touches the bottom of the caliper but also crosses like it's at the top of the edge ridge towards the outside of the carb. By the way I looked at my caliper and it does have that part that extends out like that. I just never used it like that before LOL !!!
 
Wait a minute am I looking at this wrong ? Is there a edge on the inside of the carb wall just inside of where the gasket lays ? I'd go check my carbs but right now with the wind chill it's about 2 degrees outside where I live. My garage is not attached and it's at the back of my property. Call me a wimp.....but......I ride motorcycles not snowmobiles. That's just how I roll.
 
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