I want to add a bit of pep to my 400EX. Not because it it needed or because I feel I have been let down, but because testosterone is leaning it's weight on me. I dont really want to dump to much into my quad since I anticipate retiring it to my wife when Honda comes out with their next sportquad, but a 14 tooth seems like it my be a cheap start. So my question is, "what can I expect?", "what are the pro's and con's?"

Thanks Much

 

it would be better if you also went to a 40 tooth rear also...

or just a 13 tooth front... then you would notice something

alot more torque..... less top speed.... AND you may need a CDI box... especially if you put on a pipe

 

If you want a little more power, don't go with a smaller front, you are going to find yourself shifting alot more and losing a lot of top end speed, the 400ex already has a lot of torque. Unless you ride deep slow technichal crawling trails, then the smaller front sprocket will be advantagous. Other deep trails you are just going to slow you machine down and have the engine whinning all the time

To help you out here we need to know what kind of riding you will be doing. My recomedation if you just want a little more grunt and you don't ride in deep water is to remove the airbox cover, get a Uni or K&N filter and up the jetting one size. This will run you about $35 and give you about 2 HP across the board.

 

I had a 14 on for a while, and boy was it fun!! A little blip of the throttle, and you could pop the front end up off the ground in any gear. It's great for play riding, BUT IT WASN'T PRACTICAL AT ALL out on the trail. The front end was off the ground at the most inoportune moments. I would punch it coming out of a turn, and end up with no stearing control!! One tooth in front equals three teeth in back. I would suggest you go 1 tooth larger in back to start with, but you will need a longer chain.