Re: Puch Dart Surging under throttle

Aaron Goldman /
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> Overpriced Parts Wrote:

> -------------------------------------------------------

> Bombing downhill can lead to a Seize, whether from fuel starvation and

> or high timing you, you could have a piece of something come loose

> making blockage somewhere in fuel system

>

> I never run a new to me engine/bike until I pull the topend, clean and

> address anything in there, pull the carburetor and pitch the internal

> screen filter in banjo fitting and clean everything, Check, clean or

> change the petcock and filter for good fuel flow, make sure the exhaust

> is unblocked, inspect the transmission and clutch and service the

> magneto,

>

> Of course brakes and wheel-bearings too.

>

> Taking apart everything first on every bike I got, nine times out of 10

> I found issues, many that were bad enough if not addressed would have

> led to catastrophic results.

That's the confusing part. I've completely gone through the entire bike as you said, even down to the wheel bearings, etc. This was my test run before I prepare to sell the moped.

It has been suggested that the carb may have been starved for fuel due to going WOT down a hill; or perhaps the angle of the carb had something to do with it. The Dart uses quite a long fuel line also which isn't ideal for fuel delivery.

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