I sync'ed my throttle bodies the other day so thought I would do a write up on that. There is already a huge discussion from days gone by on the topic here http://www.rswarrior.com/forums/21-how-tos-general-maintenance-tips/133498-how-sync-throttle-bodies.html There are some really good pics there also that might be helpful if something here isnt so clear.
1) Remove gas tank.
From here things can get tricky depending on if you have done a V-BAK or if you have a meter or you are using a home made meter. I have a Morgan Carbtune II and a homemade VBAK so the write up will be for using that.
2) I cut a 2ft length of 1/8" tubing and put it on the nipple coming off the back of the throttle body just behind where the throttle cables hook up, this would be on the same side of the bike as the clutch.
looking down from above
3) Now I found the sensor that has the grey connector going to it. If you have done a VBAK hopefully you kept all your vaccum hoses going to the same sensors so this will work. I pulled the vaccum hose from this sensor and installed a t fitting. Then a short piece of tubing to hook back up to the sensor. Now I cut a piec of tubing about 1'6" long and hooked up to the free spot on the T fitting. I cut it 1'6" to account for the approximate 6" of tubing already there so that both of the tubes I will hook up to my Carbtune are about the same length.
4) I hook both of these tubes we just installed up to my Carbtune and started the bike. I let the bike run for 5-10 minutes to get good and warm.
5) Now that its good and warm its time to sync everything. Now I tried to sync things at about 1,500 rpm. I have read where you should do it at idle or at higher rpm's. I couldnt do it at idle because its to difficult to see with the carbtune. The columns jump up and down to great to see of its sync'ed. At about 1,500 they werent jumping nearly as much and it was more stable so thats what i sync'ed at. The adjuster screw is just to the left of the one tube you hooked up on the throttle body
I would turn it an 1/8" at a time then blip the throttle wait a few seconds and see what changed. Then turn the screw more or less depending on what happened.
Once everything is as close as you can get it take off the tubes you put on, remembering to put a cap on the nipple and the T fitting, or just take the fitting back out.
Then put the tank back on and you are good to go
1) Remove gas tank.
From here things can get tricky depending on if you have done a V-BAK or if you have a meter or you are using a home made meter. I have a Morgan Carbtune II and a homemade VBAK so the write up will be for using that.
2) I cut a 2ft length of 1/8" tubing and put it on the nipple coming off the back of the throttle body just behind where the throttle cables hook up, this would be on the same side of the bike as the clutch.
looking down from above
3) Now I found the sensor that has the grey connector going to it. If you have done a VBAK hopefully you kept all your vaccum hoses going to the same sensors so this will work. I pulled the vaccum hose from this sensor and installed a t fitting. Then a short piece of tubing to hook back up to the sensor. Now I cut a piec of tubing about 1'6" long and hooked up to the free spot on the T fitting. I cut it 1'6" to account for the approximate 6" of tubing already there so that both of the tubes I will hook up to my Carbtune are about the same length.
4) I hook both of these tubes we just installed up to my Carbtune and started the bike. I let the bike run for 5-10 minutes to get good and warm.
5) Now that its good and warm its time to sync everything. Now I tried to sync things at about 1,500 rpm. I have read where you should do it at idle or at higher rpm's. I couldnt do it at idle because its to difficult to see with the carbtune. The columns jump up and down to great to see of its sync'ed. At about 1,500 they werent jumping nearly as much and it was more stable so thats what i sync'ed at. The adjuster screw is just to the left of the one tube you hooked up on the throttle body
I would turn it an 1/8" at a time then blip the throttle wait a few seconds and see what changed. Then turn the screw more or less depending on what happened.
Once everything is as close as you can get it take off the tubes you put on, remembering to put a cap on the nipple and the T fitting, or just take the fitting back out.
Then put the tank back on and you are good to go