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Keyster Carb Kit

3973 Views 8 Replies 5 Participants Last post by  qwerty
I just installed the Keyster kit and I'm having some real problems. The bike ran fine before the kit but the float needle was shot. I bought the kit and have since also purchased a #40 pilot since the kit comes w/ a #38. It runs on choke but not well and when the choke is removed there is a backfire through the carb. It also takes a while to return to idle when rev'd. I thought it may be an air leak so I replaced the intake manifold, didn't help. I have had it off three times now inspecting everything, it all seems right.I am wondering now if it's running rich and needs the needle lowered.

Has anyone else used these kits?

Is the jet really the size of a TK #116?

What needle clip setting have others used?

Anyone have suggestions on things to check/recheck?

1989 (all stock)
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I bought some carb rebuild kit off ebay and it was all wrong for my '87 TW. I think it was a Keyster. When I installed all the parts it ran very poorly. Long story short I ended up only using the o-ring that came in the kit that they called a float bowl gasket and the float needle valve.

After a couple of weeks the new float needle valve started leaking. I took it apart and the rubber on the needle was cut in a circular manner. I looked inside the seat and it had a knife edge on it. I smoothed the seat / knife edge with a pointed rubber polishing thing and it has worked ever since.

Pointed rubber polishing thing.

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