hello, just bought my first yamaha and my first big 4stroke, 01 WR426. very hard to start, has a racey idle, wants to stall, will only idle at approx 2000 rpm or higher, misses on midrange accel, and pops/backfires on decel. fuel overflows from the hose off bottom of float bowl anytime the gas is turned on. prev owner installed Big Gun exh with dual header pipe, removed grey wire. all stock other than those two mods. i installed a brand new NGK and removed and cleaned the pilot, leak, and main jets as well as needle and seat, checked jetting size against the yamaha service manual - jets are all stock. i checked cold valve clearance and the intakes were tight so i reshimmed all three with a hot cam shim kit and they are all now within spec but the cam chain seems to be loose - i can move it about a half inch when i press down between the two cams while the tensioner is fully extended. new cam chain and jet kit on order. i've read through all of the FAQs, jetting guide, and modification guide as well as read through a lot of old thread posts and here is my plan but i am hoping you guys might pitch in your two cents if you think i'm getting off on the wrong path or not. i'm hoping someone can tell me what the basic recipe is for a wr with a full exhaust: -the local shop verified that the jet kit on order is for a yz, not a wr - should i cancel the order and get the JD kit i've seen so many times on TT? -it's still very very very hard to start after cleaning carb, my right ankle is still sore adjusting tight intake valves, fresh gas in tank, and new plug and from what i've read, the JD kit doesn't come with a new pilot jet - don't i need to raise the pilot size to help startup? i'm in louisville KY, 'the Ohio River Valley' not sure of elevation. -i'm planning on swapping in an 03 yz cam to accomplish two goals of switching to yz timing and eliminating the manual decomp -i'm planning on switching out the throttle stop screw to a yz oem to compliment the grey wire disconnect as i've read in TT -i've ordered a new needle and seat to cure the overflowing float bowl because adjusting float height does not stop the overflow from coming out of the hose off the bottom of the bowl, only shutting of the gas. -planning on getting the zip tie fuel screw to help adjust idle once i've installed the jet kit, new needle/seat, cam and cam chain do i really need to plug the pilot air jet and mess with the accelerator pump? thanks in advance, i've researched TT for about a week and have owned this bike for a bout a month so i'm excited to hear what you guys think is the best set up for me as an aggressive trail rider.