2017 KTM 500exc-f ref/sync mode

[Xiaodong Xie]

Hi,i am from a fsae racing team.These day,we try to use Motec M800 to control 2017 KTM 500 exc-f.But we are stuck with ref/sync problem.The engine has no camshaft position sensor and we added a hall sensor,and the ref sensor is magnetic sensor.There are 17 space evenly small tooth and a big teeth.We have tried mode 2 which has no error shown in the diagnostic errors ,but there were no spark generated from spark plug.And we also tried mode 3 and mode 5 which had shown error no sync error and ref/sync syncronised in diagnostic errors.
So we make a conclusion that we haven't selected the right ref/sync mode.Could anyone have the same experience?Is there a kind of OEM mode suit for 2017 KTM 500exc-f ?Thank you in advance!
PS.Could any one tell me how to attach file?
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[Xiaodong Xie]

This is what crank trigger look like

[David Ferguson]

Your wide tooth is not nearly wide enough based on how much the engine changes speed due to compression (a missing tooth ends up being 3 half-periods wide). You would be far better making equally spaced teeth, and then removing one (if 36 or less) or two (of more than 36) of them.

I think you would learn more from watching at least this webinar -- in the beginning the different types of trigger wheels that can be used is shown.

https://www.youtube.com/watch?v=mv0-9_JS8oA&hd=1

There are several other ref/sync webinars -- you should watch them all...

[Xiaodong Xie]

David： Thank you for your reply.As far as i know,this kind of crank trigger is not typical missing teeth or additional teeth.So if i need to modify the crank trigger,will it have bad influence on dynamic balance of rotor when i modify it into missing teeth mode?