Post by keltex78 on Mar 29, 2014 11:48:48 GMT -5
Okay all,
My scooter's turning over 5000 miles so I'm finally getting prepped to tear the rear plastics off and finish a proper PDI on the beast! It's getting hard to start in the morning (details below) so I want to do some troubleshooting while it's apart. so what should I look for or plan on replacing while I have it torn down?
244cc YY250T
I know the basics like fuel, filter, and vacuum lines. I already installed a new NGK plug about 1500 miles ago. Should I plan on swapping the fuel pump, CDI, or anything else? I would like to avoid having to take it apart soon...
Hard start:
The first start of the day after a weekend or several days of driving has been getting progressively harder. It used to start instantly. Now, even after parking overnight, it takes a long time to start. But, after it is cranked, it runs perfectly all day long. Subsequent starts, even after the motor has completely cooled, are extremely easy. My thought is prossibly weak vacuum on cranking? Fuel evaporating/draining from the carb means it has to pump fresh fuel? Without the motor firing, the vacuum is too weak for strong fuel flow? Once the motor cranks, fuel flow is at full volume, the carb fills, and doesn't empty until an extended parking time? Sound reasonable? Should improving the vacuum help?
My scooter's turning over 5000 miles so I'm finally getting prepped to tear the rear plastics off and finish a proper PDI on the beast! It's getting hard to start in the morning (details below) so I want to do some troubleshooting while it's apart. so what should I look for or plan on replacing while I have it torn down?
244cc YY250T
I know the basics like fuel, filter, and vacuum lines. I already installed a new NGK plug about 1500 miles ago. Should I plan on swapping the fuel pump, CDI, or anything else? I would like to avoid having to take it apart soon...
Hard start:
The first start of the day after a weekend or several days of driving has been getting progressively harder. It used to start instantly. Now, even after parking overnight, it takes a long time to start. But, after it is cranked, it runs perfectly all day long. Subsequent starts, even after the motor has completely cooled, are extremely easy. My thought is prossibly weak vacuum on cranking? Fuel evaporating/draining from the carb means it has to pump fresh fuel? Without the motor firing, the vacuum is too weak for strong fuel flow? Once the motor cranks, fuel flow is at full volume, the carb fills, and doesn't empty until an extended parking time? Sound reasonable? Should improving the vacuum help?
..BAD TO THE BONE..