[LAV1000]

Dmitry and JHolland.
You guys mention the MAX9924.
I thought the VR conditioner uses the MAX9926

Dmitry.
Using scope, like JHolland said:
You need change the voltage range so you can see the amplitude properly
Mess around whit settings until you get a nice picture on the screen.
I post a picture of one of mine scope screens, it is a dual channel but focus on the green channel.

What is the value of your tuning potentiometer ?

I now you like the bike be sequential on its fuel settings.
But it might be better to focus on the crank sensor only and if it works right change to sequential.
I still think your bike could be running on whit an vr sensor.
Do you use a screened cable to the speeduino ?
And where did you connect the screen ?

[Dmitriy]

The MAX9926 chip is soldered to the VR board. Judging by the datasheet MAX9924-MAX9927 differences in the number of channels.
10kΩ tuning resistor
My oscilloscope has a total of one channel.
I shot a video of the oscilloscope screen.
At the beginning of the video, the “+” wire of the oscilloscope is connected to output No. 8 of the VR board.
Then he switched the "+" wire of the oscilloscope to the input signal from the VR sensor (connected to pin JP4 immediately after the 1kOm resistor)You can see how the signal is changing.
Then I re-connected the wire to pin 8 of the VR board and rotated the resistor.
The "-" wire of the oscilloscope was not involved.
It seems to me that the output signal from pin 8 of the VR board should be of a different shape.
The wire from the VR sensor is unshielded, such as it was from the factory.
https://www.youtube.com/watch?v=7sCYY2EkCd4

[Eric H]

Dimitri,
It looks like your scope is on an AC coupled input. For looking a square waves you really want a DC coupled input.
You need to hook up the - input of the scope to a good ground, preferably the ground at the VR conditioner for the cleanest signals.

[Dmitriy]

Guys it seems the VR board has earned !!!!
How I did it: I installed the jumper JP4, I removed the resistor R10 from the VR board.
On advice, the LAV1000 turned off the camshaft sensor and used the Semi-Sequential mode.
The motor spins perfectly in all speed ranges.
There are a few minor issues:
1 after the gas discharge, it is flooded, but I think after setting up the VE card this problem will disappear.
2 does not start as with standard ignition, it takes more time to turn the motor with a starter and slightly open the throttle.
I noticed an error in the engine speed readings, I register the file, then I look at the log, for example, the maximum speed was 12300 in the log, but I remember that the motorcycle tachometer showed 14500 -15500. I don’t know who is wrong, the motorcycle tachometer shows more or speeduino writes less to the log file, but I notice this every time I write a log file with maximum engine speed and maximum speed on the road. And each time in the log file the engine speed is 2000-3000 less than it was on the tachometer.
I will try the option using a camshaft sensor and sequential injection.
If everything bubbet works fine, I plan to put a second row of nozzles above the throttles.

[LAV1000]

No sync losses anymore ?

[Dmitriy]

No sync losses anymore ?

Today I set everything up for sequential injection with a camshaft sensor. It works like a clock !!!
That is, the synchronization problem was in jumper JP4 and resistor R10 on the VR board.

[Dmitriy]

Hello friends tuners.
Made a lot of races and adjustments. And I found out that if speeduino controls the ignition, then the engine does not spin above 13000 + - 500 rpm.
Judging by the tachometer and the log file, the discrepancies in speed on the tachometer are small, for example 13000 in the journal 12300-12800. Further as if a misfire.
At the same time, it seems to me that the mtor is very hot.
If the ignition is controlled by a standard control unit, then the engine spins up to 15000-15500, but in the log file it is 13000.
attached archive with log + backup look please.

[LAV1000]

Something wrong whit MAP sensor or vacuum leak ?

I think dwell is to low try something between 2.0 - 3.0 msec, be careful check temperature on ignition coils.
2.4 seems to work better then 1.8 msec

And AFR looks very rich I see 12.00 at 13000 rpm.
Maybe change your settings so AFR is around 13.5 at 13000 rpm.

[Dmitriy]

Something wrong whit MAP sensor or vacuum leak ?

I think dwell is to low try something between 2.0 - 3.0 msec, be careful check temperature on ignition coils.
2.4 seems to work better then 1.8 msec

And AFR looks very rich I see 12.00 at 13000 rpm.
Maybe change your settings so AFR is around 13.5 at 13000 rpm.

MAP is connected to one cylinder so it makes noise.
according to my observations, on a throttle 90% AFR 12.0 produces the best power.
The operating time of the spark changed 1.5-3.7 milliseconds. I did not notice a special difference, apart from a strong heating of the wiring.
It just seems to me that speeduino stops registering engine speeds above 13000. If it is not critical for the operation of the injectors, they continue to pour fuel, but for the formation of a spark it is critical.

[LAV1000]

Something wrong whit MAP sensor or vacuum leak ?

I think dwell is to low try something between 2.0 - 3.0 msec, be careful check temperature on ignition coils.
2.4 seems to work better then 1.8 msec

And AFR looks very rich I see 12.00 at 13000 rpm.
Maybe change your settings so AFR is around 13.5 at 13000 rpm.

MAP is connected to one cylinder so it makes noise.
according to my observations, on a throttle 90% AFR 12.0 produces the best power.
The operating time of the spark changed 1.5-3.7 milliseconds. I did not notice a special difference, apart from a strong heating of the wiring.
It just seems to me that speeduino stops registering engine speeds above 13000. If it is not critical for the operation of the injectors, they continue to pour fuel, but for the formation of a spark it is critical.

For MAP you can set some filtering if needed.
Dwell, seems like you worked it out already.
Can you set the crank sensor filtering to off ?
Any change to measure ignition timing at 13000 rpm ?
At 13000 rpm every crank revolution only takes 4,6 msec !