Here is what I ended up with for my jetting, Its really good for me so I wanted to share. I ride year round from 4000 in winter to 11000 in summer.
My bike was bought used from Portland with a Taffy jet kit installed so I don't know what needle it is becasue the numbers are filed off. Before my re-jet it was way rich in the mid and lean off idle so the bike ran hot on slow trail because off-idle was where it usually runs at . The mid problem was mostly the accelerator pump, it seemed like it would squirt for 10 seconds! It would load up and blubber at half throttle low rpm in sand whoops. After fixing the squirt time to 2 seconds, I had to go up on the main even for our altitude. I have since had it to moab in february, idaho city in june and 11000 feet on the trail and not changed a thing. I can go over 100 miles on the 9 liter tank easy. After the re-jet I removed the radiator fan, It never even girgled since.
Mine is a 40mm FCR.
I glued a .030" spacer washer inside the pump diaphram cover to limit pump travel then set it to start the squirt as soon as the slide moves out of the way.
60 pilot air jet I drilled out to .020"
fuel screw 3 turns out (before I drilled the paj it had to be run at less than half out)
200 main air jet
168 main jet (was 160)
35 pilot
85 start jet
needle clip 4
I wish I knew what the need was but the bike runs so good I'm not going to try anything else.....
I also lower the float about 1-2 mm below stock level and put a plug in the overflow hose so it doesn't drip fuel on rough trail, it really helps the fuel mileage.
My bike was bought used from Portland with a Taffy jet kit installed so I don't know what needle it is becasue the numbers are filed off. Before my re-jet it was way rich in the mid and lean off idle so the bike ran hot on slow trail because off-idle was where it usually runs at . The mid problem was mostly the accelerator pump, it seemed like it would squirt for 10 seconds! It would load up and blubber at half throttle low rpm in sand whoops. After fixing the squirt time to 2 seconds, I had to go up on the main even for our altitude. I have since had it to moab in february, idaho city in june and 11000 feet on the trail and not changed a thing. I can go over 100 miles on the 9 liter tank easy. After the re-jet I removed the radiator fan, It never even girgled since.
Mine is a 40mm FCR.
I glued a .030" spacer washer inside the pump diaphram cover to limit pump travel then set it to start the squirt as soon as the slide moves out of the way.
60 pilot air jet I drilled out to .020"
fuel screw 3 turns out (before I drilled the paj it had to be run at less than half out)
200 main air jet
168 main jet (was 160)
35 pilot
85 start jet
needle clip 4
I wish I knew what the need was but the bike runs so good I'm not going to try anything else.....
I also lower the float about 1-2 mm below stock level and put a plug in the overflow hose so it doesn't drip fuel on rough trail, it really helps the fuel mileage.
