Just installed the Sparks pipe filter and jet...It called for a Dyno jet 150 but it bogged real bad at the top of each gear so I backed it down to a dj 146 but now it's to lean...should I put the 150 back in and move my needle instead?I'm on the 3rd clip

 

You have a z-400 to!!! man you really are the coolest person on earth![img]i/expressions/face-icon-small-wink.gif[/img]

 

LOL.....Thanks.bro...I got the jetting though...I went to a 165 and put the needle on the 4th clip and turned the screws out 2.5 turns....runs perfect

 

Great now you have another "work of art" LoL

o and my horses Andy and Jedi are much prettier than yours!!![img]i/expressions/face-icon-small-tongue.gif[/img]

 

I run a 170 jet and on the 3rd clip
so it sounds about right where you have it

 

Man I had the same problem with my 03 Z400. I took it to the local dealer and they could not get it right. Do yourself a favor and order a Dial-A-Jet from Thunder Products. The web site is WWW.Thunderproducts.com. I can't explain exactly how it works because it would take forever but I can tell you that it is very easy to install and works great. My quad has never ran so good. The technical help from Thunder products is top rate. The Dial-a-jet only cost me 70.00 and it was bargin. It was very refreshing to get something that actually works like it is supposed to. Hope this helps, Troy.

 

Stallion I have pretty much the same set up on my dvx 400 and I was running a mikuni 170. Just put in hotcams last week and I jumped to a mikuni 185