TMAN; Glad you got the problem fixed and also started this debate. Everyone gets to learn more that what they asked for. Cool!

Even though I live in Texas, I don't know much about Bass Fishing but I do know about riding/ racing a motorcycle and the effects of braking on the suspension. Finish most of your braking before leaning in a turn so that your suspension is settled or loaded evenly. You're gonna load the front end either way from braking with the front, rear or downshifting. Simple Physics. Why slow yourself down by using the motor when you can grab a handful of brake seconds before entering a turn while the other guy is still downshifting using his motor. I could drop 4 gears before entering a turn in less than 2 seconds, release the brakes or trailbrake a little, lean in the turn and be on the power before the apex and full power out at the exit even before I'm straight up while the engine brake guy is just entering the turn behind me. And yes, I too have taken the California Superbike School before I started racing for 5 years in the AFM & AMA. And yes, I was good/ fast. Still am for an old guy. But Hayden IS faster!

 

Pro racers racebikes don't run rich. They run as lean as possible without detonating/ knocking. The flames (in pictures) from Tommy & Roger Lee Haydens bikes while downshifting are due to a Lean Misfire. The throttle is closed, the TPS sensor has shut off the extra fuel, the RPM's are high and the engine is still sucking in a lot of air past the throttle plates; more than it has fuel for combustion. Not having enough air for a proper fuel mixture prevents the fuel from igniting and dumps it out the exhaust. An over-rich mixture will not ignite either,especially in the exhaust. A backfire through the throttle body would be from a rich condition.

Did I also mention that I am ASE Certified as an L1 Driveability Specialist and Motorcyle Mechanic with at least 8 full years experience in building, racing and tuning high performance motorcyles. I know how to tell when a bike/ car is running lean or rich. I just worked on the Jets you fly on now for the past 18 years.

 

Yea what he said!

Wish you you pass along some of those practice drills from Codes school. I have not made it there yet but sure would like too.

 

I don't want to start anything but, I am looking for clarification so I understand this subject more. You said "still sucking in a lot of air past the throttle plates; more than it has fuel for combustion." and then went on to say "Not having enough air for a proper fuel mixture " which would it be too much air or not enough. All I know is that on old school rods you would run extra rich in order to light a fire out of the tailpipe with a spark producing device in the exhaust pipe of couse. Like I said I just don't know about racing bikes but want to learn.

 

Too much air or not enough air & fuel mixture will not ignite. I'm saying that at deceleration the bike is esentially dying/ starving for fuel until the engine RPM slows down for its proper fuel supply for the amount of throttle opening. You're shutting off fuel supply and the motor slows down; deceleration. Have you seen the experiments where a guy throws a lit cigarette in a 55 gallon drum of gasoline and the cigarette is extinguished? Not the correct stoichiometric Air/Fuel ratio. Please read this for further explanation: http://en.wikipedia.org/wiki/Stoich

 

Thanks speed sometimes I need pictures and Barney to explain before it makes sense. We did the cigarette in a cup of gas when I did first year of Auto Tech in High School. Of course that was over a decade ago.

 

You're most welcome bro, Anytime.