FROSTY
21st May 2004, 13:08
Im having a bit of a problem getting my zxr400 to do its thing propperly.
Its running very rough and gutless up to about 6000rpm then it clears out and goes fine.
I've spoken to the previous owner who tells me the following.
It was a stock bike and was running fine and well right through the rev range. he fitted a foam filter air box and an after market pipe.Still running fine. He removed the speedo and fitted a little box to fool the bike into thinking it was in 5th gear when in top--still running fine.
He took it to a mechanic-I wont say who and he basicly butchered the carbs.
He then took it to another mechanic he reset and rebuilt the carbs.
Still It wouldnt run propperly down low.
Ive checked compression--fine -one cam had a dodgy lobe so I replaced that. Ive cleaned the carbs and checked them over and they seem to be fine
the jets are the correct size- um factory mains are 100 and ive got 102 in there.
I was going to drop the needles one notch but it has non adjustable needles so i can only raise em.
Someone has suggested I should try refitting the speedo to see if it will
solve the problem down low but I thought the wizz box would fix that.
Any Ideas /suggestions no matter how stupid they might seem greatly apreciated- this is driving me nuts
Its running very rough and gutless up to about 6000rpm then it clears out and goes fine.
I've spoken to the previous owner who tells me the following.
It was a stock bike and was running fine and well right through the rev range. he fitted a foam filter air box and an after market pipe.Still running fine. He removed the speedo and fitted a little box to fool the bike into thinking it was in 5th gear when in top--still running fine.
He took it to a mechanic-I wont say who and he basicly butchered the carbs.
He then took it to another mechanic he reset and rebuilt the carbs.
Still It wouldnt run propperly down low.
Ive checked compression--fine -one cam had a dodgy lobe so I replaced that. Ive cleaned the carbs and checked them over and they seem to be fine
the jets are the correct size- um factory mains are 100 and ive got 102 in there.
I was going to drop the needles one notch but it has non adjustable needles so i can only raise em.
Someone has suggested I should try refitting the speedo to see if it will
solve the problem down low but I thought the wizz box would fix that.
Any Ideas /suggestions no matter how stupid they might seem greatly apreciated- this is driving me nuts