Turbobike Web Site www.Turborick.com
All,
Took my CBR600 turbo for it's first ride this weekend. It's
suffering from 2 carb related probs. I have a baaad lean spot around
6-8000 rpm, off the guage on my 02 sensor. If I can get it to cough
through that (scary) it pulls hard and runs OK, but I get a wicked
backfire between shifts (chase vehicle reported 3 foot exhaust flames
before I buzzed out of sight).
I've been moving my stock needles richer each time and am getting
some improvement in running, but am always full lean at 7-8000. It
makes 6-7 lbs of boost here and 10lbs above 8000. Originally, the
slides were opening too fast and flooding the motor at about 3000, so we
plugged 1 of 2 holes in the slides at the suggestion of the mechanic
where we were dynoing. I think this is my backfire problem, they are
slow to open and therefore slow to close. So I will be removing the
plug and going to stiffer springs like y'all suggested.
Where do I get stiffer springs, and how is the stiffness rated????
I'm planning to shim them tonight to see if I can get rid of the
backfire at least.
Feedback? I'm thinking I need a different taper needle to fix the
lean spot, but how are the tapers measured? I made a see through cover
on my airbox, so I know approximately where the slides are at this rpm
under no load.
thanks,
Dave.