Dd50

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Last808king
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Dd50

Post by Last808king » Mon Jun 13, 2016 5:50 am

I got a dd50 with an oil tank, and just bought a 72 polini corsa bore. I was wondering will the oil tank affect and make my bore seize?

Peteyparado
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Re: Dd50

Post by Peteyparado » Mon Jun 13, 2016 6:07 am

Plug the pump an run premix
86 aero af16 swap. 121cc water cool.
Polini 30mm carb
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Wheelman-111
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Re: Dd50

Post by Wheelman-111 » Mon Jun 13, 2016 3:27 pm

Greetings:

The pump is designed by Honda/Kymco to supply oil for 49ccs. When you enlarge the cylinder by 8mm in diameter, that quantity of oil is spread too thin. You must increase the quantity of oil per stroke. Since you can't easily recalibrate the pump, that means you have to add some oil to the fuel. One ounce or a bit more per gallon seems to do the trick, but a lot of tuners prefer to ditch the pump - and the little power it subtracts from the output shaft - altogether and premix an known-safe ratio. Many of us choose to run pump-free and pre-mix 32:1, or about 4 ounces per gallon.
Wheelman-111
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