hi all, mine is a k7 model, with 55000km done,
recently i experienced a power drop at rpm 8-9k rpm. in lower gears 1-3 it can rev to 11k no problem, but in higher gears it cannot rev past 9krpm
bike is stock except for BMC air filter and yoshimura bolt ons.
Engine oil and filter changed every 5000km. Spark plugs Changed with Denso Iridiums every 15000km. Air filter washed and oiled a week ago.
Heres the situation
Firstly i found out that Header no. 4 was not as hot as the rest when i sprayed WD40 on the headers it don't steam up immediately as the rest.
secondly i changed new plugs and the the no.4 header is still not as hot.
Thirdly, i swopped over the spark plug and the sparkplug coils with no. 1 and no. 4, still the same, the no.4 header is not as hot as the rest.
any advice?
recently i experienced a power drop at rpm 8-9k rpm. in lower gears 1-3 it can rev to 11k no problem, but in higher gears it cannot rev past 9krpm
bike is stock except for BMC air filter and yoshimura bolt ons.
Engine oil and filter changed every 5000km. Spark plugs Changed with Denso Iridiums every 15000km. Air filter washed and oiled a week ago.
Heres the situation
Firstly i found out that Header no. 4 was not as hot as the rest when i sprayed WD40 on the headers it don't steam up immediately as the rest.
secondly i changed new plugs and the the no.4 header is still not as hot.
Thirdly, i swopped over the spark plug and the sparkplug coils with no. 1 and no. 4, still the same, the no.4 header is not as hot as the rest.
any advice?
