Dd50
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- Noob
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- Joined: Mon Jun 13, 2016 4:50 am
- Location: Honolulu
Dd50
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?
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- Spree
- Posts: 280
- Joined: Fri Feb 26, 2016 4:02 am
- Location: Hawaii
Re: Dd50
Plug the pump an run premix
86 aero af16 swap. 121cc water cool.
Polini 30mm carb
Naraku mani
Scorpion stroker pipe
Stage6 CDI
5gram rollers
Keli high speed Variator
6.1 gears
94mph
Polini 30mm carb
Naraku mani
Scorpion stroker pipe
Stage6 CDI
5gram rollers
Keli high speed Variator
6.1 gears
94mph
- Wheelman-111
- Moderator
- Posts: 11322
- Joined: Wed Oct 22, 2008 5:09 pm
- Location: Deepinnaharta, Texas
Re: Dd50
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.
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
Most of my money is spent on scooterparts. The rest is just wasted.
"ISO": '03 Vespa ET4 Malossi187 74MPH
Flash 9: 2001 Elite SR Contesta 72 ZX Tran, 9:1 Gears, Stock Airbox/Carb/Pipe 58.8 MPH
Punkin: 2010 Vespa/Malossi S78, 61MPH
Most of my money is spent on scooterparts. The rest is just wasted.
"ISO": '03 Vespa ET4 Malossi187 74MPH
Flash 9: 2001 Elite SR Contesta 72 ZX Tran, 9:1 Gears, Stock Airbox/Carb/Pipe 58.8 MPH
Punkin: 2010 Vespa/Malossi S78, 61MPH