the new beefier swingarm...you can see the turbo mounted up under the seat with the pipe exiting under the rear tail. This is my learing platform... after this I will build a car tire chassis with very large motor and turbo setup. Well thats the goal...if this turns into a nigtmare ill end up with a real big motor with nitrous LOL.

dont know about da 1/4 but in da 1/8 i run a 19/34 and run in da 120's mph i dont know how these cats r running 17/39 and 18/38 in da 1/4 and not running out of gear

thats the same gears I am using....ive got a 19/34 setup in 525 size. My rear tire is larger so I hope it will be enough but I think im gonna be screwed!

More RPM!

5 r 6 speed

I use 6 Gears in the 1/4 mile

yes, I have the 6 speed robinson as well... 19 front and 34 rear sprocket... should be interesting.

Dan, here's a nifty calculator for you. I dont know off the top of my head what the difference is between the Robinson and stock trans in 6th, but this will get you an idea.

gearing calculator

When my wife went 115mph in 5th with a 19-39 gear, the motor was having to spin at 11,600. That was based on a 20.5" tall tire. That's overrev LOL. Mat Shearer told me the OOF small bore pipes will overrev to around 11,200.Of course this is based upon a stock primary gearset as well. Hope that helps, Bubba

Sweet.....with my setup it comes out to 157MPH and thats probably assuming the stock 2.68 gear set.... Looks like I should be just fine
Thanks Bubba...

one thing you must remember the quad tires will swell giving you more roll out and your bike tire will not so much. just my 2 cents