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Post by ejlundberg on Jul 11, 2017 22:01:00 GMT -5
So my YW50S is acting a bit funny..
It started a few months back (but I haven't had time to get into it until recently). On my way home, it died out, then when I got it started, it would bog down under throttle. Happened fairly quickly.
Now, I have changed the air filter, cleaned the entire carb, changed the spark plug, ran inspection on the petcock, and taken off the muffler to check for clog.
But HERE is the part that might mean something. It works sometimes? After I changed out the spark plug, it ran beautifully, seemingly faster than ever. I took it around for a test and about 7-8 blocks away, I stopped at a red light, and when I tried to throttle back up... nothing. Bogging down again.
Same thing happened when I took the muffler off. Initially, it was still bogging down.. then, 5 minutes later, I started it up again. This time it ran for a minute or so before I turned it off because its too loud for the city.
I'm going to try and run it loud again without the muffler in increments to see if it will work, but I don't think the muffler was clogged. I blew through it hard, used some compressor air through it, and there doesn't seem to be a blockage.
What is making my old Zuma behave like this?
P.S. I'm a newb.
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Post by flyangler on Jul 12, 2017 8:19:26 GMT -5
Not a 2stroke expert but it sounds like you're running too rich , when you are running a new plug it runs good for a while but only until the plug fouls? Then when you open up the exhaust it runs better for a while.
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Post by flyangler on Jul 12, 2017 10:28:36 GMT -5
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Post by ejlundberg on Sept 13, 2017 21:43:23 GMT -5
Pulled the brand new spark plug. Was fouled.. another new one, turned it on and just tested it for a second, runs great. If its running too rich, what do I do to correct it?
I've also heard possible air leak?
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Post by pistonguy on Sept 14, 2017 7:06:33 GMT -5
What kind of (brand) of Two Stroke oil are you using? And are you Pre-mixing or is it Injected?
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New Rider
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Post by ejlundberg on Sept 17, 2017 22:15:16 GMT -5
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Post by pistonguy on Sept 18, 2017 9:23:13 GMT -5
Hey bro the link is for Lucas 85w-140 Heavy Duty Gear oil, were are you putting that? Are you running that in your Injector? or if no what Two Stroke either injector or pre-mix oil are you using? this is important Your Fouling a Bunch of Plugs then with new plug she runs great.
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Post by chewbaca on Sept 18, 2017 10:09:58 GMT -5
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Post by akais on Sept 26, 2017 18:42:33 GMT -5
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Post by dollartwentyfive on Mar 16, 2018 11:41:14 GMT -5
i don't know if it's been mentioned, but an electrical short can cause you throttle problems. i had all kinds of problems with the enrichener, and it was because of electrical, not the carb.
a frayed wire on my ride was scraping on the frame. it wasn't enough to blow any fuses but it was causing me acceleration problems. and of course, the standard carb service.
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