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85atc350x
02-02-2005, 05:10 PM
Just wondering how fast everybody elses big bore 400ex can go, And what gearing they are using.
Bigg Pimpin
02-03-2005, 12:23 AM
I hit 68.6 on the stock rev box with 14/38 gearing.
400exrider707
02-03-2005, 09:15 AM
what size tires? I dont think mine will do that with stock gearing!
speedy400
02-03-2005, 10:08 AM
Well with a built 416ex I got up to 70.7mph in 1000 feet with 16/38 20 inch rears on ice with ice picks.-darren
400exrider707
02-03-2005, 11:57 AM
Originally posted by speedy400
Well with a built 416ex I got up to 70.7mph in 1000 feet with 16/38 20 inch rears on ice with ice picks.-darren
That sounds a little bit more reasonable with the higher gearing, but 68 mph with 14/38? Wow thats cool if you could do that.
alabama400ex
02-03-2005, 02:00 PM
I reached 70 with mine with a Big Gun CDI
85atc350x
02-03-2005, 03:44 PM
Do you guys think that if I run a 16t front sprocket, A 36t rear sprocket, And 22" rear tires I could get close to 80mph?
Big - D Racing
02-03-2005, 05:25 PM
it doesn't matter if you ave a 440, 500, 416, or stocker they all go the same speed, if you want a higher top speed you change your gearing and tires. Built 440's just get to the top speed faster than a stocker. You want a high top speed run 16/36 gears with 18inch tires on the track that'll get you up there or you can use 16/38 with 20" tires, don't put on too big of tire or you'll lose a lot of bottom end.
Bigg Pimpin
02-03-2005, 11:15 PM
Originally posted by 400exrider707
what size tires? I dont think mine will do that with stock gearing!

20's and that was with it popping off the rev box. Opened it up with the stock 15/38 setup yesterday and got to 72 before I had to back out. I have seen another 400 hit 72 also on GPS with 14/38 and a WB rev box.