400ex Front Sprocket

[brandon025]

My 400ex that I bought used, came with a 16t front sprocket on it. With a 16t front there isnt enough room to use a case saver. I was thinking about about buying a 15t front(stock) so I can use a case saver. What kind of difference will this make? I ride track and trails, and dont race. Should I get a 15t or stick with the 16t? Thanks.

[EvilJester400EX]

What kind of case saver is it? I have a Pro Design case saver and it has plenty of room, I run a 16t front sprocket.

[toby400ex]

Like he said they make case savers that will fit with a 16 tooth sprocket, but id think u would want a 15 tooth anyway with a stock 400ex on the trails.

[ewalker302]

I just put a 16t on my lightly modded 400 a couple weeks ago & just modified the stock case saver to fit.

It took about 20 minutes with my dremel tool.
Grind out about 1/8" or less from the inside curve, real easy.

Just grind it some & test it until it fits right.
It's still plenty thick or I wouldn't have used it.

Plus it's free & if you don't have a dremel tool just go to the hardware store, you can get a grinding bit to use in any drill.

I just trail ride & dont race, so
I got a lot of room to run fast & I absolutley love the 16t front.

I also bought a sparks degree key but havent put it on yet, I didn't want to do both mods at once so I could see if I could tell a difference when I installed the key, but from what I've read on here that should perk up the bottom end some.

1st was always too low for me anyway.

:bandit:

[speedy400]

if anyone wants to get rid of a 16 t front sprocket, I've been looking for one, no one carries them though... where do you guys get them???thanks-darren

[EvilJester400EX]

I got mine at the local Honda shop.

[ewalker302]

Mine is a Renthal

You can order em from any atv catalog.
C&D probably has em.

:bandit:

[brandon025]

Thanks. I'm going to shave the stock case saver down a little bit until I decide if I want to switch or not. Our trails are pretty much wide open and I've never really had a problem stalling it, just a couple times in really tight stuff...Will the 15t make it a lot slower? Maybe I could put a 15t on and take 1 or 2 teeth off the back and that would be about half way in between a 15t and a 16t right?

[brandon025]

I looked into trimming up the stock case saver and there is no way that I can get it to fit in there. If I did, it would be very thin and probably wouldnt help much at all. I have decided to switch to a 15t front. Should I replace the stock chain and rear sprocket also? If I do I think I will take 1 or 2 teeth off of it(rear)...