Search found 4 matches

by jonathanwhitwell
Fri Dec 18, 2009 11:40 am
Forum: Technical Discussion
Topic: correct float height measuring procedure?
Replies: 10
Views: 14452

Re: correct float height measuring procedure?

The carb number is PD50B. And I think you were right about the jet size! My book says the main jet is supposed to be a 90, but the main jet on the carburetors says 100. That seems really odd because the motorcycle has its original 4-4 stock exhaust pipes and stock air filter, air box, and cover. The...
by jonathanwhitwell
Fri Dec 18, 2009 2:45 am
Forum: Technical Discussion
Topic: correct float height measuring procedure?
Replies: 10
Views: 14452

Re: correct float height measuring procedure?

Wonderful. The float heights were drastically wrong originally. It looks like the previous owner tried to get the bowls to stop leaking by setting the floats way too low. Maybe the bike will run this time around. I'll let you know when I try it again in a few days. Thank you. Yes, there are working ...
by jonathanwhitwell
Thu Dec 17, 2009 8:50 pm
Forum: Technical Discussion
Topic: correct float height measuring procedure?
Replies: 10
Views: 14452

correct float height measuring procedure?

Hello. I'm trying to fix up some carburetors I've got from a 1980 CB650C. They're the keihin kind with the mechanical slides. The clymer manual says the float height should be .5 inches (12.5 mm), but it's a bit ambiguous about how to measure that. I measured from where the fuel bowl seats (bottom o...
by jonathanwhitwell
Tue Dec 01, 2009 1:33 am
Forum: Technical Discussion
Topic: o-rings between the carburetors
Replies: 1
Views: 1929

o-rings between the carburetors

Hello. I've had a non-functional 1980 cb650c for quite some time now. I'm planning on finishing it over the winter break. I bought a carb rebuild kit off of e-bay for this bike (it has mechanical, non-cv carbs), and it has a lot of good things in it that I'm sure I'll need (jets, air cut off diaphra...

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