Float Valve Opinions

I purchased a carburetor overhaul kit from V4 market recently and the new float valves are stamped with #1.6 the old valves are stamped #2.4 is this going to cause a problem?
Thanks for your assistance.

 

Are they the same physical size?

 

Physically they look the same. I installed one and it seemed to fit O.K., not sure about the other dimensions, will have to get the old dial calipers and check it out.
I am curious though as to what these numbers actually mean

 

Numbers refer to inlet hole size, therefore max fuel flow rate into carb.

 

Just got back from looking at that. The 1.6 has a smaller diameter inlet, and the 2.4 is larger. everything else seems to be the same.
What would be the impact of using the smaller ones? Or should I use the larger ones only?

 

Possible fuel starvation under heavy type loads, high rpms and possible being lean because the bowls are not filling fast enough. When it leans out it will run hotter, ping or if you have timing retard that will happen. Down on power at times.

Get the correct size or drill them out only if the needles for the 2.4 and 1.6 are the same.

 

Thanks guys for your feedback. My instinct tells me that the float valve being over 30% smaller would have some negative impact on the fuel mixture. I sent an email to V4 about the size discrepancy but have not heard back yet.
Thanks again,
Tom

 

Hehe, Texas comes to mind.:wink:

 

Did some checking on old ebay carbs I purchased a few months ago, from 1983 VF750's. Surprise to me they all had "1.6" float valves installed! I suspect at this point the carbs on the bike are not the original. Further amplified by fact that when I had this thing running it really sucked the gas at moderate speeds. Does anyone happen to know or can verify that for the 83 VF750F they came with "1.6" float valves. Also the numbers stamped on the carburetors are different than the ebay ones. Who knows what has been done to this bike after nearly 30 years. The P.O. doesn't know anything about the history as he bought it from someone else.

 

Sometimes two motorcycles (HONDA) use the same exact part but have different numbers. The part numbers just show which bike it was for.
EXAMPLE the clutch spring washer on the VF1000R is also used by the VF1100.
Rhe carbs and many of the parts are the exact same parts for the VF1000F/R and VF1100's.

I am running VF1100 carbs on my VF1000R. Same exact parts. Mainjets may be different. Thats all. I have 125 mains but could go all the way up to 150 mains if I want to, but I do not run the bike at full throttle often. It would just use up a lot of gas.
I have two .060 washers under the needles though to give me more power in the mid range. !/4 throttle to 3/4 throttle. and very good throttle response. spark plugs look perfect.

 

Thanks guys for your feedback! I'm going with the new 1.6 float valves along with all the other SM specs. Let you know how it turns out when finished.