just need to know what kind of parts i can get to make my 400ex faster quickly.

 

Depends on how much money you want to spend. You can go the budget route, with a slip on pipe, and a high flow air filter plus jetting. Or to see big gains, you can do a higher compression piston and cam, plus the slip on and filter.

 

Or if you just care about how many miles per hour you can go, go up a tooth on the front sprocket.

 

How do u adjust the sprocket?
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You dont adjust it, you buy a new one and install it. Very cheap, and easy to do.

 

youll start off a bit slower((a little bitty) nd then youll fly in the high mph

 

or visa versa (go down one tooth to take off faster)

 

Stock front sprocket size is 15 tooth, go up to 16 for a higher top speed (more miles per hour) or go down to 14 for more acceleration but less top speed. We're not talking huge differences but maybe around 10-15 miles per hour faster top speed with the 16 tooth, that would put you in the mid 80's if I am not mistaken. But it will take a little longer to get going that fast because you loose a bit of acceleration.

 

I may be wrong, but putting in the 16 tooth front sprocket also requires you to remove your case saver, (or grind the stock one down until it is really thin)... I wouldn't do that. If you want a little more speed without loosing as much bottom end, get a 36 tooth rear sprocket. I guess it depends on what type of riding you do, but just changing the sprockets isn't the answer. It helps when fine tuning your bike after doing different mods to it. I personally run a 14 tooth front sprocket, and it is perfect for me (but I don't drag race). It does the job for riding in the dunes, hillclimbing, and general fast trail riding. I'm actually considering dropping the rear sprocket down to a 36 tooth to gain back a little speed on the top end, because with the 14 tooth front, you will lose about 5-7 mph on the top end, but you accellerate like crazy.

 

thanks everbody