Jawa what is going on?

I have a jawa supreme 2 1982. I have a new carb, new spark plug, and seemingly clean fuel line. Doesn't idle very we'll but I can get it running and when it hits about 25 it shuts down and picks back up at 10mph??? Any help on root issue besides my ignorance would help, thank you.

Re: Jawa what is going on?

Brent Bublitz /

Re: Jawa what is going on?

Vlado vlado /

look at owner's manual on www.jawamoped.com

Re: Jawa what is going on?

Vlado vlado /

maybe slightly clogged petcock, air leak on intake

exhaust port, header pipe, muffler full of carbon?

or reset timing- very easy, follow manual

Re: Jawa what is going on?

is it a clone carb, you'd do good to check float level among other things.

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