OCEMN Needle for 400RFS

[z20ate]

I've purchased an OCEMN needle and 168 main jet, before I install these into my MXC400 has anyone already done this and what are the results. I read the other thread concerning the 520's but what to know about the 400's.

Thanks,

 

[scottyr]

The 400 doesnt seem to respond as well to the needle as the 520 does. I have fiddled with my 400 and it seems that if you get the low end better, the top end may suffer, and vice versa. Everyone has a different opinion on what works best. Some guys say the 172 main works better yet others say the 165 is the way to go. Good Luck!

 

[z20ate]

Thanks for the input. The power is good as is, I just wanted a little more snap off the bottom. Maybe I'll put a 13 tooth countershaft sprocket on the front and see how that feels before changing the needle. I hardly use 6st gear anyway.

 

[jeb]

I use the EMN needle in the middle with a 170 main, stock pilot and one out on the air/fuel screw. This gives me a bit more down low and into the midrange. Not a lot of difference but enough to make it easier to lift the front wheel in 3rd to wheely over things. I'd recommend giving it a try.