Autonerdz forums

I have a DRZ 400 Suzuki and although not FI they have what they claim to be a TPS when in truth it is not as we would define it in the automotive field.  I merely adjusts timing and has nothing to do with fuel.  I don't know if this is the same concept here with KTM although I know some of them as of late have several mappings for different uses, torque, high speed ect.

Tom I think mentioned adding more cylinders and this is a single I'm pretty sure, which makes some diagnostics more difficult such as Comp wave for analysis other than cranking.

It was mentioned a KTM scan tool and although KTM makes a great product, they I have heard and that even from the dealer are less than user friendly with scan data, just talking here.

If timing stays advanced I would look real hard at the TPS if it works like the DRZ although this is light years ahead of it, might still use the same principle.  There is a Map sensor in the picture so don't know what can be leaned from that.

As a side not this is a nice site, the motorcycle field is becoming more sophistocated and in most cases the techs are light years behing the automotive guys who have been butting their heads for the last 20 years, great site Tom.

AlexE wrote on Oct 20^th, 2012 at 10:56pm:


just a heads up, alex.  you need to capture secondary volts with at least a 1 micro second sample interval.  yours is at 101 microseconds.  you won't be able to reliably capture kv spikes with such a low sample rate.  pump it up until you see 1us in the properties box.

AlexE wrote on Oct 21^st, 2012 at 6:47pm:


couldn't hurt.  it's fun capturing more than one signal at a time  .  i wish the ckp signal had a missing tooth sync, though.  that would be handy.

Alex, is this a CDI ignition?, I have no idea.

I dropped a wave form of my KLR 650 and the CDI signatures look nothing like classic ignition of which I am no expert.

If you look at the burn time it is literally in microseconds and not milliseconds.  I have run this by Tom and other people whom are light years ahead of me and many admit that they know little of CDI.  Volts times amps equals watt, and the KLR is excited by 125volts AC (right off the alternator, no diodes) that's why the coil is only the size of a roll of nickels.  All that said the burn time is significantly different than that of a classic coil, which you have I don't know.


As noted, I'm no Guru, just found it interesting and even my instructors didn't know it, the burn time is so short, because it is so hot, that is the theory.