so i am looking for extremely cheap ways to get better performance out out of my 01 400ex. right now it is bone stock. how much difference will changing the front sprocket to a tooth higher and the rear 2 teeth lower affect performance. acceleration wise, speed wise, and hill shooting wise. also i eard a rumor that putting a brake block off on your machine acts as a rev limiter and lets your machine rev a little higher, is this true?? also if anyone has any tips or tricks please feel free to share.

thanks in advance

Nic

 

the brake block off wont do anything for performance. as far as sprockets...what is your main use for the bike? i dont know what the stock gearing is on a 400 but if you want more acceleration go with a smaller sprocket on the front,more top end go bigger on front. its the exact opposite on the rear. 1 tooth on front = 2 teeth on rear. you could add a k&n put an outerwears lid on, jet up a couple sizes and adjust your air fuel mix a bit. but really after that it will start costing you some $$. a slip on would be a good add on for a couple hundred bucks.

 

The gearing changes you are considering will <u>significantly</u> raise your gearing.....

You will lose low end power and throtle response, overall torque, and be slower off the line. What you will gain is top end speed (and speed isn't the definition of "power" in my book!). The ratios you are suggesting are appropriate for fast wide open riding, like in the open desert. It will make it miserable on a tight eastern woods trail, or steep hillclimbs where you really need torquey power.

If it is stock I would start with the basic engine mods, like opening up the airbox, air filter, and an aftermarket exhaust, and of course a rejet. After that, then you can start messing with your gear ratios, if you must.