www.zxrworld.co.uk

right i still cant find out whats wrong with my bike, started chugging a bit up the revs n thot it was jst dirty fuel....then gradually got worse! now when it gets up around 10thou it chugs its way to 14thou! doest sound or feel very nice! ive balanced the carbs, replaced the plugs for iridium ones n also cleaned out the carbs, could it be the ht leads or coils? somebody help! weather is too good for something like this!!!!

i had the same sort of problem and it turned out to be the HT leads,the end that screws into the spark plug cap was all split so not connecting properly.

gotta be worth stripping the ends off and cleaning them up. then get yourself a spare lead and putting a spare plug in the end swap them at the coils 1 by 1 to check you have a spark from each coil outlet.

yup. what he said. also could be coils . i had a cb750 that was similar to that and it turned out to be split carb rubbers.

cool thanks! listen ive just realised that when i open the throttle right up it sounds as if its either gettin starved of fuel or gettin too much! coz the engine just dies then kicks back n dies like it aint gettin the right amount of air/fuel in!! its doin ma head right in!
help me get it sorted quick coz the weather is too good!!! gonna go insane if i cant get it fixed soon!!!!! cheers guys!

then its a fuel/air prob. check your rubbers. try putting the choke on and doin it. if its ok then the mixture is weak and vice versa

to test your rubbers run the engine then spray carb cleaner on the rubbers, if they are split or leaking the engine will vary in rpm.