gears 7.4 or 7.9 on dd50
Moderator: Moderator
gears 7.4 or 7.9 on dd50
Hey guys I am torn on what gears to purchase? Right now I have 6.8 and thats how I got the bike and hate cause off the line sucks donkey balls lol... anyways what is the difference in speed on the 7.4 and 7.9 and the benefits of it and the top speed difference.. I know guys tell me to run 7.4 do to my weight which I weigh about 230 lbs... so 6.8 is not what I want...
2006 SYM DD50
72 Corsa
Mini Stroked
26mm Polini carb
Stage 6 intake manifold
Sparrow Exhaust
Polini Ruckus Variator
Malossi Fly Clutch w/ blue
1500 contra
Lightened mag
7.4-1 gears
72 Corsa
Mini Stroked
26mm Polini carb
Stage 6 intake manifold
Sparrow Exhaust
Polini Ruckus Variator
Malossi Fly Clutch w/ blue
1500 contra
Lightened mag
7.4-1 gears
- Wheelman-111
- Moderator

- Posts: 10683
- Joined: Wed Oct 22, 2008 5:09 pm
- Location: Deepinnaharta, Texas
Re: gears 7.4 or 7.9 on dd50
Greetings:
What engine mods?
If it's 50cc, you'll need a really strong tailwind or a hill to see a higher top speed with anything taller than 9:1.
High-revving Corsas and similar builds need no taller than 7.97 to reach their best speeds. (I know the primaries in the DD are different from Dio)
Ministrokers and strokers can run taller gears than that, but it takes a full-on stroker to need 6.8s. No wonder it sucks if it's 72.
What engine mods?
If it's 50cc, you'll need a really strong tailwind or a hill to see a higher top speed with anything taller than 9:1.
High-revving Corsas and similar builds need no taller than 7.97 to reach their best speeds. (I know the primaries in the DD are different from Dio)
Ministrokers and strokers can run taller gears than that, but it takes a full-on stroker to need 6.8s. No wonder it sucks if it's 72.
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
Re: gears 7.4 or 7.9 on dd50
How fast can 7.9 gearing top end be? It's a corsa mini stroked by the way... I'm just really torn on people's choices here in hi everyone wants all speed but I want all around if that makes sense..
2006 SYM DD50
72 Corsa
Mini Stroked
26mm Polini carb
Stage 6 intake manifold
Sparrow Exhaust
Polini Ruckus Variator
Malossi Fly Clutch w/ blue
1500 contra
Lightened mag
7.4-1 gears
72 Corsa
Mini Stroked
26mm Polini carb
Stage 6 intake manifold
Sparrow Exhaust
Polini Ruckus Variator
Malossi Fly Clutch w/ blue
1500 contra
Lightened mag
7.4-1 gears
- Downsouthdio
- Elite

- Posts: 835
- Joined: Wed Dec 21, 2011 11:00 am
- Location: Key west
Re: gears 7.4 or 7.9 on dd50
I have 7.5 secondary and also minstroke corsa..takeoff is alot better than when i had 6.8's, and i hit 75 with the 7.5's, good luck
Honda super dio
Corsa
26mm
Sparrow
Corsa
26mm
Sparrow
Re: gears 7.4 or 7.9 on dd50
yeah I put 7.4 with 1500 contra spring and 3000 clutch springs and it flies.... I may even think I need to put heavier weights in to have a faster top end...Downsouthdio wrote:I have 7.5 secondary and also minstroke corsa..takeoff is alot better than when i had 6.8's, and i hit 75 with the 7.5's, good luck
2006 SYM DD50
72 Corsa
Mini Stroked
26mm Polini carb
Stage 6 intake manifold
Sparrow Exhaust
Polini Ruckus Variator
Malossi Fly Clutch w/ blue
1500 contra
Lightened mag
7.4-1 gears
72 Corsa
Mini Stroked
26mm Polini carb
Stage 6 intake manifold
Sparrow Exhaust
Polini Ruckus Variator
Malossi Fly Clutch w/ blue
1500 contra
Lightened mag
7.4-1 gears
