Spit and sputter

Wild Piggy · 08-09-2018, 05:07 PM

We just did a big bore upgrade to 80cc on a Mad Dog scooter. We changed carbs 5 times, new CDI, coil, stator, spark plug twice, even changed the head again. Starts and runs fine, until you take off, then it starts to spit and sputter. We pulled the engine out and replaced it with a brand new 49cc out of the box. Ran great, NO spit and sputtering. Any suggestion would be greatly appreciated.

08-09-2018, 05:07 PM	#1
Wild Piggy Join Date: Aug 2018 Location: Vermontville, Mi Posts: 1	Spit and sputter We just did a big bore upgrade to 80cc on a Mad Dog scooter. We changed carbs 5 times, new CDI, coil, stator, spark plug twice, even changed the head again. Starts and runs fine, until you take off, then it starts to spit and sputter. We pulled the engine out and replaced it with a brand new 49cc out of the box. Ran great, NO spit and sputtering. Any suggestion would be greatly appreciated.
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