Replacement float valves

[flathead]

Davo,

I got the brass tube from McMaster-Carr. Mine was a BCH smaller than the hole, so I had to expand it by wiggling the shank of a #45 drill in the end till I got a tight fit. Worked great.
Saved 3 unusable bowls.


Mark

[davomoto]

In technical terms, correct me if I'm wrong, a BCH is .0001mm larger than an RCH. :-)

[e3steve]

Ah, but both are pretty coarse measurements compared to a GCH......

[Snakeoil]

Thanks for the feedback. As a former machinist, CH dimensions are known to me, plus I have a conversion chart on the wall should I forget.

Mine is not leaking at the carbs. Both my carbs dribble a small amount of gas out the overflow tubes that are connected to the brass overflow tubes. It leaves two marks on the ground under the bike. So that is why I think it is the worn float needles. And I know they are worn. Actually, probably the most worn of any valves I've seen in all my years of tinkering with engines.

I checked to make sure the floats were free, but the point about the gaskets extruding into the bowl, which was mentioned in another post I found with a search, might be playing a role here. I'm in the process of going thru some maintenance items on the engine now that the riding season is coming to a close so I'll recheck those carb floats for free travel.

Thanks for the tip on CB750F viton tipped float valves.

regards,

Rob

[wargoth]

I want a copy of the CH chart, could you post a pic?