Trimoto Mike
07-14-2019, 03:14 PM
New to 2 Strokes -- have a few questions on tuning the YT-125 motor.
It's never easy to start up - but when cold , it's about the three pull start while keeping the throttle open a bit.
When warm, I have have to give it full open throttle to get it to startup again, or cut the fuel and then turn the petcock back on immediately after it starts up.
In neutral it starts to surge high RPM if I give some throttle, but does not go back down to idle unless I put it in gear again.
No issues running flat out for long periods of time on my flat dirt roads outside my house -- I have a 1 mile private road. But, when I was running fast and hard on the freshly plowed field out back -- way too much fun -- after about 20 minutes it starts to bog down and I can barely get back to the barn unless I run it in first gear at higher RPM.
Any clue as to what's going on? I'm at 5600 feet elevation just outside of Denver on my ranch. It ran a but better when I turned the mixture 3/4 to the right. New motor, new carb -- Jetting? Mixture? Cooling?
Thanks!
Mike
It's never easy to start up - but when cold , it's about the three pull start while keeping the throttle open a bit.
When warm, I have have to give it full open throttle to get it to startup again, or cut the fuel and then turn the petcock back on immediately after it starts up.
In neutral it starts to surge high RPM if I give some throttle, but does not go back down to idle unless I put it in gear again.
No issues running flat out for long periods of time on my flat dirt roads outside my house -- I have a 1 mile private road. But, when I was running fast and hard on the freshly plowed field out back -- way too much fun -- after about 20 minutes it starts to bog down and I can barely get back to the barn unless I run it in first gear at higher RPM.
Any clue as to what's going on? I'm at 5600 feet elevation just outside of Denver on my ranch. It ran a but better when I turned the mixture 3/4 to the right. New motor, new carb -- Jetting? Mixture? Cooling?
Thanks!
Mike