YFZ450 Slip-on Question
#1
YFZ450 Slip-on Question
I have installed a Dr. D slip-on pipe on my 2006 Yamaha YFZ450. I have no other mods on the bike. I changed the main jet to 172 and I am using a 45 pilot jet. The bike is very sluggish in the first 25% of the throttle. It runs fine if you ease into it or at higher speeds. Hitting the throttle hard from a stand still will likely cause it to stall. I ran it for a while and checked the spark plug and the color is good.
What should I change next to get it to run correctly? I have not adjusted to fuel screw. Should I adjust the fuel screw or the pilot jet?
What should I change next to get it to run correctly? I have not adjusted to fuel screw. Should I adjust the fuel screw or the pilot jet?
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