Wallie Posted June 11, 2013 Report Share Posted June 11, 2013 Bit of an odd one this. Towards the end of last year, the 636 developed a problem where it would pull cleanly through the rev range, it would hit a wall at 12krpm and wouldn't rev any higher. This was only under load however, with the clutch in it would go to the redline no problem. I put it down to dirty fuel originally, so put a fresh tank through, and under the advice of the local bike shop put a bit of injector cleaner through it and it was job was done. This was when it was totally standard. I also checked the plugs and they all looked okay. Fast forward to last week, over winter it had a full system, filter and Bazzaz installed and dyno'd with another 1000 miles problem free running also. Coming back from Uni i noticed it was doing it again, finding a flatspot at around 11/12krpm. When i got back i put some more injector cleaner in with some fresh fuel and went on a 250 mile weekend trip where it was fine until coming home, when it started again. It isnt too bad on 1/2 and 3/4 throttle, but its definitely worse on WOT. Its just like hitting a wall when it should start making the power. Im going to give it an early service for peace of mind this weekend, so while its apart is there anything I should look at? Iv been searching all day and cant find any information to even know where to start looking. Thanks. Link to comment Share on other sites More sharing options...
BenF125 Posted June 11, 2013 Report Share Posted June 11, 2013 Someone on gixerjunkies (k5 1000) had a similar problem and it turned out to be the fuel pump. Theirs wouldn't rev in neutral either though. Another on there (k1 1000) found a faulty TPS gave similar symptoms. Link to comment Share on other sites More sharing options...
Kaos Theory Posted June 11, 2013 Report Share Posted June 11, 2013 Had similar problems on a CBR600RR, fuel pump eventually diagnosed at fault, swapped in a replacement from a breakers, bike ran like new again. Link to comment Share on other sites More sharing options...
BudgetBoy Posted June 11, 2013 Report Share Posted June 11, 2013 Air filter nice and clean,,then i would go for fuel pump as stated. Link to comment Share on other sites More sharing options...
Wallie Posted June 11, 2013 Author Report Share Posted June 11, 2013 Cheers guys, looks like ill have to get one ordered Link to comment Share on other sites More sharing options...
lorenzo Posted June 11, 2013 Report Share Posted June 11, 2013 Is it possible to get it onto some sort of diagnostic software so you can have a look at various sensors etc, to see if they're all working OK? As has been said it could well be a fuel pump issue but if it's thinking it's still in 1st gear (and has some sort of ignition retard thing accordingly), or if it thinks the clutch is in, it'd do similar things to this too. Link to comment Share on other sites More sharing options...
Wallie Posted June 20, 2013 Author Report Share Posted June 20, 2013 Changed fuel pump, did 300 miles on it today and can say its as good as new. Cheers chaps, its appreciated. Link to comment Share on other sites More sharing options...
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