FMF Power core 4 for a ttr-125

[jimyzttrxr]

Has any one used a fmf power core 4 on a ttr-125. I was going to install one on my bike and was wondering if any one had one if they were pleased with its performance, I have already cut the top out of my air box. But I still need to rejet it can some one tell me a good place to start with the jetting.
Thanks Jim

 

[biglou]

I've got some info I saved, but the way it's worded I'm not sure if this is the stock jetting or after the mods. Anyway, I've got "17.5 pilot, and 110-120 (depending on mods)" on my list.

Senior KXrider has a PC4 on his son's TTR125. Sounds nice, not too loud. Not sure how well it performs over stock. I'll say the most bang for the buck, IMO, is to have the flywheel turned down. You can take ~24oz. off it and it really makes the throttle snap compared to stock flywheel weight.