[Barry Hastings]

Those are the bleeder screws.  The easiest way to bleed those brakes is with a gravity brake bleeder.  Or can do a bottle and put in the top of the master cylinder.

First need to make sure the brake pucks are pushed against the brake pads.  I do this by using my brake bleeder attached to the MC.  with the valve closed I pushed the brake pedal then open the valve.  The fluid will then run back into the bleeder and then I would take out the screws in the caliper (bleed screws) and let the fluid drip out until bubbles stop.

The karts with springs on the brakes you cant pump bleed them like you do cars.   You push on the brake let the fluid out, tighten the bleed screws let off the brake you will make a vacuum in the brake system and pull the pistons off the pads. (with spring return brakes)

[Barry Hastings]

Do you know where you are slower compared to the competition?  The 206 is not happy with junk in the carb, and the clutches can be a pain as well.  Have you done the maintenance to the engine?  Just asking to make sure it is truly a chassis thing.

 

I have seen the clutches work work work then turn to crap as well.  bog way way down.

 

Just a couple other things to think of…

 

[Barry Hastings]

Looking at as much as you can will open your eyes and cause you to question your sanity at the same time.

 

First you need to define your test and what you want to accomplish.  Apply those tools and see where it points you.  But as Gary and others said, this wont help you find speed.  I  have a hard time, well extremely hard time, running and driving my own tests.  One reason, I’m paying too much attention to WHAT the kart is doing than driving it fast enough to find the problem.  PLUS if you are testing a theory, you are apt to judge it properly.  its your theory, you have a emotional attachment to if it works or not.

[Barry Hastings]

What he was saying to do was make sure the steering shaft was in the center, that both tires were pointed the same distance from each other when steering wheel is straight.  You can do that with a tape and tow plates and even with the line on the tires…

That said, you probably have some bend issues from the accident.  IF the toe was set straight or 2mm out or what ever your preference is, even if your steering shaft is say clocked 10 degrees one way or the other, on the straight it shouldn’t pull, but in the turns left and right there could be a difference in the turn performance from that steering shaft being clocked…

[Barry Hastings]

I LOVE the predictive lap time,  One issue with the predictive lap time GPS based predictive lap times has to deal with the margin of error of the GPS on a kart track.  Some of the tighter turns are nearer the limits of the window the GPS looks at.  Race car tracks MUCH more reliable as they have larger turns and is easier to be more accurate.

That said, the predictive with GPS is still a great tool for learning new tracks, and to try somethings out in different turns, or groups of turns.  Way back there is a story Senna would go on track with a stop watch to do segment times to figure out what was faster.  Sure we could down load and look at it after the session, but the predictive can give you real time plus, minus for a turn or group of turns.  Go into a turn half a second slower than the best lap, come out only a quarter second slower, you have made it thru that section better than the lap before….

Shawno, yeah you’ll probably crash, New Castle you would have more time to look at the dash.

[Barry Hastings]

Take the bumpers off for cleaner racing…

 

Of coarse its easier said than done.  The over penalization of any and alcontact would be pretty bad as well.

[Barry Hastings]

One thing to also think about is the karts dont like to always off the throttle all the way thru the turns.  An OFF throttle will tend to have the kart kind of flop until the throttle is picked back up.  Not 100% but just a crack can really settle that kind of hop down.

[Barry Hastings]

Tune to Win is a GREAT book.  Not as much directly related to karting.  One of the best things i have seen for karting is the same thing TJ mentioned.  The Arrow guide.

 

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