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The new ECU needs programming to match the key, otherwise it thinks you are using another bike's key to steal it and activates the immobiliser. Usually a HONDA dealer job because they have the access via their diagnostics. Andy

History is clean, doesn't look like it was stolen. Interesting if I will change the ECU to a correct one. How it would be with the key?

Likewise, glad you’ve got to the bottom of it. 👍

That'll do it! Glad you found it. 👍 Anything in the history to suggest it was stolen? ECU replacement is often after some scrote shoved a soldering iron through the case to defeat the HISS. Welding will do it too. Andy

Ok, found the issue... Looks like this motorcycle had issue and someone replaced it's ECU... And the ECU that is inserted now - is from NC700X. That's why it also does not show selected gear and fuel consumption... Current ECU code: 38770-MGS-D11

The honour of having the world's shortest and most pointless CANbus is shared by the (I think) last two years of the 865 Triumph twins. The two instruments on my Thruxton - speedo and rev counter were CANbus. Never made much sense to me.

The sensor is mounted somewhere on the crank, so base of the cylinder/clutch sort of area. It's an inductance type sensor so unlikely to read wrong, they either back off and read nothing or go open circuit. Follow the cable though, any sign of crushing damage? An intermittent short to another sensor will occasionally cause double speeding. I'm also surprised the EM light isn't on, the display is just bling, the real purpose of the sensor is fuelling. What's the fuel consumption like? If it's doing 35mpg it could be something mechanical like the clutch. An O

How much time and money do you want to spend? Does the bike run OK? If it does, ignore the display and enjoy the ride.

No, it is new battery

Hmmm, I wonder if it could be a battery issue, 2015 bike, original battery?

OK; it was a bit of a longshot.

Checked the multiplug, all contacts clean, connected firmly... anyone knows where is the other end of all these wires? Probably goes to the ecu, but where it is located?

Thanks for advice, will check back of instrument panel.

Either sensor failing or a plug somewhere is not properly seated or dirty. Also worth checking the multi plug at the back of the instrument panel as that can corrode and cause odd effects. interesting the Engine management light isn’t being triggered by an out of spec reading. I would be tempted to look at the instrument panel multi plug first. A lot of body panels to strip off to get to it if I recall correctly.

Tried to disconnect battery, wait for 10 minutes and then connect... Same issue...

Sprockets sizes are correct. It is manual. Showing too high rpms not only when driving, but also when standing.

Are the front and rear sprockets the correct size? Yes think it should show the gear selected. Is the SA a DCT or manual?

BTW does 2015 NC750SA should show gear in the dash? Asking because it doesn't show

For example: when engine is in working temperature - it shows ~2500rpm, driving at 60km/h in 5th gear it shows 7000rpm. And i it allows to rev way more even it is reaching scale limit. Motorcycle had small crash and I'm wondering maybe one of sensors is not in correct position, or something similar...

Out of curiosity, how are you measuring the “correct” rpm, and over what range?

Once on my ER-6N I rode through a colossal downpour and for about a week afterwards the rev counter was all over the place. After about a week some sensor or contact finally dried out and all was fine.

An interesting one; I don't recall that issue arising with an NC. I used to have a Moto Guzzi. One evening I started the engine and rode off and was alarmed to discover that the engine appeared to be revving much higher than usual (about double) according to the rev counter, yet the clutch was not slipping nor did the engine appear to be running faster than normal in any gear. Weird. It turned out to be that on switching the ignition on I had started the engine a little bit too soon, so that the ECU diagnostics had not completed the self-test before the engine was started. The

I probably will once I've done a few more miles on a wider variety of roads. I rode it about 130 miles back home on Friday, mainly motorway and dual carriageway and it was obviously way better than standard, the rear is spot on now I've wound out a couple of turns of preload but the front is still a touch firm for my preference so I'll wind out the preload on the forks too. I'm sure once it's dialled in properly for me it'll be great.

Hi, Recently bought NC750S 2015. And just now noticed that dashboard shows way too high RPMs than it really is. Is there a way how to calibrate it? Or any other solution available?

Hi @VinnyB have you/will you be writing up a review on your Nitron set up as I would be as interested as I am in learning about @oldwisedude's impressions of his Maxton set up in due course👍I had planned to change my NC this year but if I can improve further on my HyperPro set up I may keep it a while longer.