So I'd been having some trouble with a surging or stuttering problem. Basically between 3k-4k RPMs the bike was really herky-jerky and would pop a bit when I chopped the throttle off to shift. It made for driving around town a pain in the ass. I couldn't notice any problems once the bike got above 4000rpms.
It already had a new air filter and new plugs. My TPS was off a bit so I set that back where it should be. I scurbed out the inside of the throttle bodies with some carb cleaner and a rag. None of theat really made a difference with the rough running.
I'd seen some other guys onine make their on manometer to sync the throttle bodies. I though that was a better option than spending over $100 to buy a new one, or spending even more to have the dealer look at it and do the adjustment.
I bought a roll of 1/4 I.D. clear tubing from the hardware store. I bought two 1/4 in T connectors. From NAPA I got the 5/32 black vacuum hose and the 4 adapters to connect the two different size of hoses. I had some spare pegboard at home already. The assembly is pretty simple from just looking at the pics. Then put a bit of automatic transmission fluid into one of the tubes. Some people use water, but it seemed like most people went with the AT fluid.
You connect one tube to each of the throttle bodies. Start the bike up and if the throttle bodies aren't set right each one will pull the tranny fluid to different levels inside the matching tube. You turn the adjusting screws on the throttle bodies until the fluid levels in each tube match all the other levels.
Once I got everything hooked up it only took about 10-15 minutes of adjusting to get all 4 throttle bodies set to the same level. The adjustment screws seemed a bit touchy. It didn't take much of a turn to make the fluid levels move a couple inches up or down the tube.
After it was done and everything put back together the bike is running great. I can pull away from stoplights without any more bucking around. Everything is smoothed out...maybe not quite like new, but very very close. I didn't realize how of a difference this was going to make. I'm glad I attempted this on my own. The whole set up was easily less than $20 and was pretty easy to do.
It already had a new air filter and new plugs. My TPS was off a bit so I set that back where it should be. I scurbed out the inside of the throttle bodies with some carb cleaner and a rag. None of theat really made a difference with the rough running.
I'd seen some other guys onine make their on manometer to sync the throttle bodies. I though that was a better option than spending over $100 to buy a new one, or spending even more to have the dealer look at it and do the adjustment.
I bought a roll of 1/4 I.D. clear tubing from the hardware store. I bought two 1/4 in T connectors. From NAPA I got the 5/32 black vacuum hose and the 4 adapters to connect the two different size of hoses. I had some spare pegboard at home already. The assembly is pretty simple from just looking at the pics. Then put a bit of automatic transmission fluid into one of the tubes. Some people use water, but it seemed like most people went with the AT fluid.
You connect one tube to each of the throttle bodies. Start the bike up and if the throttle bodies aren't set right each one will pull the tranny fluid to different levels inside the matching tube. You turn the adjusting screws on the throttle bodies until the fluid levels in each tube match all the other levels.
Once I got everything hooked up it only took about 10-15 minutes of adjusting to get all 4 throttle bodies set to the same level. The adjustment screws seemed a bit touchy. It didn't take much of a turn to make the fluid levels move a couple inches up or down the tube.
After it was done and everything put back together the bike is running great. I can pull away from stoplights without any more bucking around. Everything is smoothed out...maybe not quite like new, but very very close. I didn't realize how of a difference this was going to make. I'm glad I attempted this on my own. The whole set up was easily less than $20 and was pretty easy to do.
