Anyone know where to get a 1-up tooth front sprocket, or -2 rear sprocket for a 400ex? If you have one, how did the machine handle it? I'm running a stock machine, and need a little more speed to try to take a couple of Banshees.

 

You should be able to get either through the dealer. I believe there are aftermarkets available too. I have heard it is possible to go 2 more up front with mods but if your chain binds your screwed. My experience with my 300 ex was adding one up front. I really never felt a change though. I would change the rear 1 or 2 higher, It costs more but bigger wheels cover more ground. Let me know how it does, I'm curious about changing it on my 400ex.

 

I HAVE DONE THE SPROKET CHANGE YOU ARE BOTH WONDERING ABOUT. YOU WANT A LITTLE MORE TOP END OUT OF YOUR EX , I PUT ON A 36 TOOTH REAR SIDEWINDER ( STOCK IS 38 ) AND IT DIDN'T REALLY HURT MY BOTTOM END AT ALL BUT YOU CAN REALLY TELL THAT YOU DON'T HAVE TO SHIFT AS FAST. I HAVE A GPS FOR MEASURING TOP SPEEDS AND WITH THESE COMBINATIONS THIS IS WHAT THE GPS READ, WITH A BIG GUN COMPLETE SYSTEM , K&N , DYNO JET KIT WITH A 165 MAIN, AND STOCK REAR TIRES I RECORDED A SPEED OF 71.4mph NOW WITH THE SAME COMBINATION AS ABOVE WITH THE STOCK 38 TOOTH REAR I ONLY GOT 67.3mph , I ALSO WEIGH 225 LBS THAT WAS NOT AN ADVANTAGE FOR THE TOP SPEED TESTS. THE 36 TOOTH SPROKET AS YOU CAN SEE GAVE ME ROUGHLY 4mph.

 

Hey wms, what do you run up front? Is it still the stock 15 tooth?

 

Oh and wms where did you get your 36 tooth from? Do you have there e-mail address, website address, or mailing address. I am interested in getting one.

Thanks

 

White-Brothers or side-winder
That second site is just ,,,,,,,,,,,Too much.

 

i got that sproket from sidewinder, it did cost around 70.00 , check out renthal sprokets in rocky mountain atv they are a little cheaper. i was running the stock front size ( 15 ) if you go to a 16 you have to remove the guard on the front .

 

Did you have to take any links out of the chain for the 36 tooth sproket?

 

ss396 i didn't have to take any out , you will have plenty of adjustment left.