Another Hawk Tuning Question

TxJasper · 05-08-2017, 10:22 PM

I'm new to the forum and also have a tuning question. I bought a Hawk 1 week ago. Stock 15/50 gears and stock settings I was getting 62-63MPH in 5th gear. I have about 245 miles on it. I changed the front sprocket to 17 and rear to 45 and replaced chain. I rejetted my main carb to 110 and shimmed the needle with two 3mm washers, with stock exhaust. Fuel adjustment screw backed out 2 turns (also tried 2.25 and 1.75) Now, I'm only getting 57-58 MPH but then 5th gear starts loosing speed back down to 52-53MPH. Shift back into 4th and MPH climbs back up to 55, shift into 5th climbs to 58 and looses speed back down to 52-53MPH. Popping sounds when decelerating. The idle acts like it hanging (idling high) when coming to a stop and settles down when I let out the clutch a little. I also smell a sharp burning smell when I stop. It seems to me that it's running lean/hot. Any suggestions???

05-08-2017, 10:22 PM	#12
TxJasper Join Date: May 2017 Posts: 4	I'm new to the forum and also have a tuning question. I bought a Hawk 1 week ago. Stock 15/50 gears and stock settings I was getting 62-63MPH in 5th gear. I have about 245 miles on it. I changed the front sprocket to 17 and rear to 45 and replaced chain. I rejetted my main carb to 110 and shimmed the needle with two 3mm washers, with stock exhaust. Fuel adjustment screw backed out 2 turns (also tried 2.25 and 1.75) Now, I'm only getting 57-58 MPH but then 5th gear starts loosing speed back down to 52-53MPH. Shift back into 4th and MPH climbs back up to 55, shift into 5th climbs to 58 and looses speed back down to 52-53MPH. Popping sounds when decelerating. The idle acts like it hanging (idling high) when coming to a stop and settles down when I let out the clutch a little. I also smell a sharp burning smell when I stop. It seems to me that it's running lean/hot. Any suggestions???
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