Hey guys, I’ve done some digging on this topic already, but I’m seeing a LOT of different answers and suggestions. I’ve watched videos from Link, motocheez, and elsucioguapo (All Kipa FCR videos). I’ve also dug into the Reddit forum as well as the ThumperTalk one. I messaged Link on Instagram and he said he had nothing but problems with his FCR, so I don’t think I should follow his jetting.
I have a 2021 DRZ400sm California model. It has a full MRD exhaust, I haven’t touched the airbox yet (I will once FCR39 is installed. A lot of guys say to do 3x3, but SoCalSM says remove snorkel only. I’ll try removing the snorkel only and if I don’t like it, I guess I’ll cut a 3x3 in the airbox.), and it still has the stock carb. I haven’t been riding the bike because it runs lean being stock with the full MRD. I already bought all the adapters, an E model petcock, and the o-ring, and some other stuff to make the FCR fit. I live in the Bay Area, the elevation that I ride is typically 100’ to 2200’. The weather I ride in is anywhere from 45-115 degrees F, but it’s typically 60-100 degrees F.
I was planning on running a 170 or 165 main jet, 45 pilot jet, mixture screw 1.5 or 2 turns out, pilot air jet 100, main air jet 200, needle clip 3. All this information was gathered by multiple places across the internet. If you guys could help me confirm what jets I need, that would be greatly appreciated.
