wreckin_repsol

runs good at WOT but when holding at a constant speed it bucks during slow speeds. during higher speeds holding constant throttle it changes from +3 -3 mph and kinda has a feeling like it cuts out from fuel or something? any help? could it be becuase my battery is shot an I have to push start the bike?

MikeM

YES!!!!!!! STOP THE BUCKING!!!!!!!!i

Suicidl

Oh no not the bucking

LxJx80

let me know what you find out about this i am having the same problem its not the normal f4i bog and my tail light is dimming every time it bogs down too i have tried to change my plugs unplugged my ecu for awhile to reset it drained the tank and put new gas and still the same one day out of nowhere it started to do this and has been doing it since i am thinking that it is electrical maybe the rectifier box thats my next step

hondaruss

Sounds like a Tps problem. Download the service manual .. testing it is no hard. takes a volt meter and little time. the middle wire should be your 5v power and one should be your signal.. and other ground it will have you slowly open the throttle and if there are any blips in the readings the tps can be the problem. just my .02

LxJx80

whats the tps

LxJx80

Throttle Position Sensor

wreckin_repsol

will do, im not around the bike now so i cant look but can you get to the wires without taking off the plastics/tank

hondaruss

youll have to take the tank and air box off. it will be at the end of the throttle bodies. follow the steps to the T. Once that is ruled out then you can move on to other things. Post your results if it is good or bad.

wreckin_repsol

will do, i wont be able to work on it till sunday tho. all my tools an dvom are at the shop. and im in another state

stickyBUDS

same problem and had it chop off up in a seat stander! mouse trap


any input?

hondaruss

hey man any info..

budweezy

Check the MAP sensor hose and all the vacuum hoses around the throttle bodies. That will cause RPM fluctuations during part throttle operation. Also check the vacuum line on the fuel pressure regulator.

budweezy

Check the MAP sensor hose and all the vacuum hoses around the throttle bodies. That will cause RPM fluctuations during part throttle operation. Also check the vacuum line on the fuel pressure regulator.