Hey guys, first post! glad to be here!!!
I have a 2007 CRF230 that i fully rebuilt, all OEM stock parts, so motor is very healthy and happy..
I bought a FMF power bomb, and power core 4 muffler, took out top of air box lid and pulled anti-bakfire screen out with K&N filter that will be going in trash and a twin air installed soon..
I bought the power up kit, 48 pilot, 132 main and the needle in middle clip. ( yes i tore carb down to nothing and made sure it was spotless even running wire cleaners and air though EVERYTHING.. Im VERY picky..)
set the fuel screw at 5/8-3/4 turn out..
I installed the said jetting and it started right up, when you quickly crack or " slowly crack" throttle open it would bog off idle bad, sometimes would catch up and take off, usually not, back out or she would die.. I fiddled with the fuel screw, no changes. ( noticed it ran great with 1/2 choke though )
so i moved clip on needle down for more fuel.. same deal.. I figured id try the Mike Coe jetting, put in the stock 07 needle, 120 main, fuel screw out 1 turn and a 48 pilot.. horrible, popped and cracked, horrible response, exhaust turned red in like 20 seconds.
I took all that out and put back in my power up kit, back to the same crap..
The way the bike was acting was a classic case of lean bog, I checked for air leaks, none.. ok so i put in a 50 pilot.. a little better but nothing amazing.. well after taking the carb apart and cleaning it again ( was still spotless ) i get mad and try a 55 pilot with 2.5-3 turn on fuel screw and....... BINGO!!!.. you can crack that thing open as fast as your wrist can open it, instant response.. It does seem very flat on top, but it PULLS HARD for a little bike in low to mid then kinda BLAH, figured a 132 was a tad rich in the top causing it to be flat.
My question is why is everyone else getting away with 45s and 48 pilot jets when I'm at running 55 and accruing to the fuel screw need to be at a 57 or 58?????
Its 60 deg in garage where i was tuning and 45 outside for test rides.. I'm at 625 feet or so running 91 gas...
What am i missing?