DR 70cc kit Urban Express ORDERED....Now what!

Matt Grantonic /
leicacat1
Jan 06, 2021 12:15AM

I wanted to take advantage of the Treats 15% off coupon so I just grabbed a DR 70cc kit, I'll be getting a new carb as funds allow. The Urban is completely stock (except for the BX31 belt) and runs OK but certainly has carb issues but its on the way out anyways. Questions I have to get it road worthy with the DR....

1) Is it necessary to replace the head?

2) Is it necessary to replace the crank?

3) Jetting range with stock exhaust?

I'm not looking for anything over 40mph and will be happy with the upper 30's in case that affects the answers to the above questions. Currently hitting a solid 32 but horrible take off due to the BX31 belt which I like to replace.

Thanks, Matt

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Re: DR 70cc kit Urban Express ORDERED....Now what!

Aaron Blair /
aaronb
Jan 06, 2021 05:14AM

Head might not fit, the dome is a different diameter, you'll find out.lol

You might not need a new crank but certainly need a rebuild or at the very least new seals.

With the stock exhaust you won't see much improvement. Maybe even less power than stock. Gonna be super restrive

Jetting, buy the next 5 sizes up from what you have and start with the biggest, go down until the four stroking juuuussst stops.

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Re: DR 70cc kit Urban Express ORDERED....Now what!

Jack Rutherford /
churioz
Jan 07, 2021 11:13PM

If your bearings sound like this replace them

My big end bearing on crank was bad too.

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