Jetting the new DRZ 125

I picked up one of the new suzuki play bikes this week then immediately drove up to BBR to blow the rest of my savings. I am having trouble jetting the little bas**rd. I added the BBR pipe and a Kehin oversized carb. The MJ that came with the carb was a 110. Upon testing the new set up I found the bottom needed some pilot work and I've got that pretty well sorted out. It pulls really well in the mid range. When the bike is on the main jet for more than about a half second it begins to miss, especially as the RPMs climb on a slight down hill run. I bumped the main up to 115 and the problem still exists, but the uphill run is improved. I've also noticed that the bike misses at constant throttle openings going down hill on my jetting run. My intital thought was that it was lean on the MJ, but I'm now wondering if it is fat on the MJ based upon the improved performance with a greater load i.e. uphill. What do you guys think? Leaner on the the MJ or richer?

The other condition I've noticed is that it misses worse when it gets hot.

Thanks for any help you can provide.

I'm going to make some radically rich changes, like 130 on the main and clip in the richest position to see what what happens. I need to set some outside limits to get the carburetion moving in the right direction. I'll report on my progress.

I have a 26mm carb

I suspected as much ACS. Thanks for the feedback. Duane Brown (of BBR,what a great guy) actually jetted the bike for me since their shop is close by. If there was anything left, he'd find it. I'm waiting for the Powroll or BBR Big Bore Kit, but for now it's a hoot to ride. It is not as fast on top as a TTR, but it has a really good midrange punch and the suspension is outstading for a little backyard racer.