Join Date: Sep 2009
Location: New Castle, Pennsylvania, USA
I've had my 88 carbs off at least 40 times trying to get them right. Replaced almost every part, ( new cv slides, floats, needles and seats) rejeted 3 or 4 times. It would get close, then the idle was everywhere! Replaced a lot of vacuume hoses, including the one under the carbs with the 90deg bend, and new carb insulators. Tried Removing every vacuume hose from carbs, plugged and capped the open ends, tweaked and got 25 mpg! Probably damaged the carbs at some point cleaning or dissassembling them! (Never stopped me from riding though!) Paid $75 for a set from a 92 on ebay. Had to clean and use the new vacuume pistons from the 88 carbs, and it runs great! The 88 had 6 vac hoses, the 92 has 4. 2 vac hoses went to an air jet controller in the right faring pocket. 88 and 89 used the AJC but was eliminated in 90! It was for high altitude( above 5,000 ft.). So I took it out and capped the hoses. The carb vents were turned down on the 92, and a vacuume hose added to the left carb just above the insulators. I capped that. Had to use the throttle cable bracket from the 88 on the 92(the 88 had an offset because of the cruise cancel switch. The 92 doesn't have a cruise cancel on the throttle cable). Some parts are not interchangeable( throttle linkage, choke linkage). Saw an 88 at the junk yard with 287,000 miles with the origional ECM not the MT2. Some have had success with the origional 88 carbs. Just not me! Hope this helps.