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Post by jstluise on Apr 22, 2013 17:28:23 GMT -6
2009 Kymco Agility 125, 12,000 km
On my drive home last week I came to a stop and noticed a sudden drop in my idle. The engine did not die, but it was pretty close. I kept the revs up while at the stop. Everything off idle is normal and it drives fine. Prior to this, the idle was normal. Seemed like a sudden change. It was raining during the 45 minute ride, but I've had it worse weather without issues.
This morning I started it up and it has the normal high idle (auto-choke works). But, after the warm up, I pulled out and it died at the next stop I made. Still had a low idle.
I have never done any adjustment to the carb or anything else on the engine. New plug ~2,000km ago, though the original plug still looked fine. New air filter around the same time.
Wondering if a carb adjustment is in order? Or valve adjustment? Could a bad auto-choke be causing this? Just seems weird that it happened all of a sudden instead of a gradual change.
Any info would be appreciated!
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Post by gatekeeper on Apr 23, 2013 4:01:10 GMT -6
Time to adjust the valves would be my suggestion. Try .004 inches on the intake and .005 inches on the exhaust.
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Post by jstluise on Apr 23, 2013 11:05:03 GMT -6
Time to adjust the valves would be my suggestion. Try .004 inches on the intake and .005 inches on the exhaust. Sounds good. After I posted, I checked out the FSM and the maintenance intervals show the valves should have been adjusted 4 times already! Looks like I've been slacking. I'll adjust the valves. Should I follow the adjustment procedure for the the carb pilot screw and throttle stop screw? The FSM says the pilot screw is factory pre-set and no adjustment is necessary...so I guess not? Also, for the valves, the FSM has 0.04mm for the intake and exhaust. 0.04mm = 0.0016". Is 0.004" for the intake and 0.005" for the exhaust the tried and true clearances for the GY6? Thanks!
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Post by gatekeeper on Apr 23, 2013 15:16:13 GMT -6
Factory specs run on the tight side for me. I like the .004/.005 on mine. Makes them tick i bit but longer between adjustments. Every engine can be a little different. To start out you might want to try .003/.004 on yours.
Get your valve adjustment done first, then worry about the carb adjustments.
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