outlaw0robo Posted August 14, 2009 Report Share Posted August 14, 2009 HI,HAVE 05 4RT,Bike has developed a missfire when engine gets up to operating temp.Have changed plug several times no qure anyboby any suggestions please. Quote Link to comment Share on other sites More sharing options...
the addict Posted August 14, 2009 Report Share Posted August 14, 2009 Try a new plug cap, are you letting it warm up with no throttle untill the fan kicks in? Quote Link to comment Share on other sites More sharing options...
outlaw0robo Posted August 14, 2009 Author Report Share Posted August 14, 2009 bike allowed to warm up,problem usualy starts after 15-20 min of riding,on removing plug it is black,runs 15-20 min again on new plug before misfire returns,will try new plug cap and lead thanks. Quote Link to comment Share on other sites More sharing options...
for artie Posted August 14, 2009 Report Share Posted August 14, 2009 a loose exhaust flange (at the cylinder) can cause a backfire Quote Link to comment Share on other sites More sharing options...
stork955 Posted August 14, 2009 Report Share Posted August 14, 2009 Gday, does the black plug look dry or wet? Cheers, Stork Quote Link to comment Share on other sites More sharing options...
benzman113 Posted August 27, 2009 Report Share Posted August 27, 2009 Two more things can cause this problem i have come across when air filter gets resrected & one were the tell tall is when it kicks back (TIGHT TAPPETS) Quote Link to comment Share on other sites More sharing options...
for artie Posted August 29, 2009 Report Share Posted August 29, 2009 HI,HAVE 05 4RT,Bike has developed a missfire when engine gets up to operating temp.Have changed plug several times no qure anyboby any suggestions please. Did you get it sorted? Quote Link to comment Share on other sites More sharing options...
outlaw0robo Posted August 31, 2009 Author Report Share Posted August 31, 2009 Problem seems to have been solved,fitted plug lead,new cap,and new coil.thanks for everyone`s help. Quote Link to comment Share on other sites More sharing options...
jrsunt Posted September 2, 2009 Report Share Posted September 2, 2009 Also worth checking on the older 4rts are the 2 wires, terminals and earth on the ht coil. These can get pretty corroded. Quote Link to comment Share on other sites More sharing options...
jimmyl Posted September 2, 2009 Report Share Posted September 2, 2009 I had a minor miss when on tick over. Never stopped, just missed a beat now and again. Stripped and cleaned kill button problem sorted. Quote Link to comment Share on other sites More sharing options...
big john Posted September 3, 2009 Report Share Posted September 3, 2009 Also worth checking on the older 4rts are the 2 wires, terminals and earth on the ht coil. These can get pretty corroded. Too true Sunt, David's 07 bike had an intermittent cutting prior to the SSDT, which was only cured when the wiring harness was replaced (thanks Munch for the advice on that point!) It was the wires leading into the coil that were at fault. Wiring harness is not expensive around Quote Link to comment Share on other sites More sharing options...
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