I have a ZZR 400 it starts an goes, but does not even reach a 100km per hour and to reach that speed I need to use the choke(this indecating fuel starvation) how can I test to see what is causing this
I had the bike at Kawasaki mechanics, they said they changed the fuel pump and replaced the carbs with rebuilds bike is still doing the same
Motorcycles - kawasaki
Answers & Comments
First thing I would look at is the fuel tank cap. There is - or should be a tank breather tube. The cap and the tube can - and do - get clogged up with dirt. Clean this thoroughly with a solvent and poke something small into the hole(s) to ensure they are clear.
Also, check out the air filter - is one present ? If there is, is it clean ? Next, go for the spark plugs - these 400cc 4-strokes rev hard and high - more like 2-strokes - so the plugs take a real hammering. Invest in some iridium ones - well worth the expense.