Real MPH numbers

Gearhead1956

How fast is your cart? I want to start my build but not till I have every thing planed in my head! I would like to gear the cart to run 20-30 mph in lower gears, but when a kid passes me on their 660 Rapter, I want to grab a gear or two and go get them.

So, how fast are you going? what sprockets,rear and tire size, RPM.
Thought I had it till I bought the bike and 6th gear ratio is 6.4 to 1 sucks!
Thats two under drives to deal with. 6.4 @ trans, and 5.75 @ rear.

BGW

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rifter

I've had mine to 115 MPH that's where I decided that was fast enough for me not the cart, I don't know how fast it will go. As far as sprockets I had to go with several before I found the right combination for Drag Racing to launch without bogging, I dropped to a 13 in the front and went to a 60 in the back with a 23 inch tall 11 inch wide tire. I can pull out on the pavement, mat the gas, and light the tires without dumping the clutch, for Drag Racing I have to warm up the slicks to get bite and still spin around 10 to 15feet. The street tires I have are alot of fun, spin tires through 1st, 2nd and 3rd. This is a 1000CC engine.

Tonka329

Well guys, my stock G9 does 13mph! And my G1 with the gov smeared I get a whopping 23! Figure you would get a good laugh!!!

Todd Dolfi

My g1 gets 24.5 with 23's

arcitech

I did the numbers for my VFR powered cart on 21" tires, and a 54 tooth rear with the stock front and it worked out to 86 MPH. The wife was not amused!

Gearhead1956

LOL, your using a jackshaft? do you have a pic? Any trouble taking off with those gears? My cart is going to be a limo cart, was thinking about to much gear with all that weight using the small M.C. clutch.

Tonka329

I'd like to see a pic of that arcitech!

Gearhead1956

Wrong chart, the chart I had, even though it said trans. ratio, it was over all ratios including rear sprocket. Trans is still underdriven but 1.181 is alot better then 6.4!
Now the find the real rearend ratio. I say 5.75 imputshaft turns to 1 axle turn would be 5.75 ratio, some have said that would only be 1/2 the ratio??

lbmfpeterson

I'm not sure on the ratios but I know you can buy gears for an ezgo gas rear end to make the rear end ratio 6 to 1 I'm not sure if that helps you......

pachanga90

85' Marathon 2pg 2-smoker,All stock except open-element filter.Clutches tricked,22" tires. 23mph.