Problem: you can start the bike on full choke without a problem. If you try to rev it up AT ALL it will stall and spit. If you give it full choke it will rev up to around 4k. Any throttle will make it stall or stumble. The owner says the problem starts to go away if he rides it for 30-40 mins.
-Replaced the carbs. I Got a very nice set of carbs off ebay. Took the carbs all the way down. Boiled, cleaned with wire and compressed air. Put new pilot o-rings in. The bike ran 100% the same (bad).
-Replaced Intake boots and o-rings. The o-rings behind the boots were leaking. They failed a vac leak test with WD-40 and starting spray. After I replaced them I found no vac leaks.. The bike still has the SAME rev problem.
-Replaced coils with 3.0 OHM Dynateks. New wires and plugs. Ran the same.
-Checked timing with a timing light. Spot on for both 1-4 and 2-3. timing advance moves.
-Checked compression. all 4 came back good.
-Plugs are always dry when I take them out.
My next step is to check the valves. Bike has 18k on it. After that I will replace the igniter and/or advance.
Has anyone had this same problem and fixed it? I have had no choice but to keep throwing parts at it.
![Confused](https://www.thegsresources.com/_forum/core/images/smilies/confused.png)
Thanks.
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