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Not entirely true.

If by 'reprogram' the OP means to flash new map/s and/or edit current maps then most modern ECU's are flashable. The term 're-programme' is used interchangeably with 'flashing.'

There are some ECUs that can't be flashed, because they are old or have been locked by the manufacturer.

However, there are numerous companies making a lot of money by flashing/reprogramming the ECU's of many different motorcycles, or selling the software for owners to use.

For example, there is software called Tuneecu which is around $10US and has many maps for Triumph, KTM, Aprilia and Benelli. There is a free flash software tool called Guzzidiag which can be used to flash Moto Guzzis and Aprilias.
I use Guzzidiag for the older Ducatis with certain ECU's.

Brad the bike boy, who is a member here, has covered a lot of what can and can't be done with different ECU's in threads here.
 

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The SG400 RE3 ECU is flashable and can be accessed to set different parameters using 'ECU Hacker' software according to members on Chinariders.net.
I found better then that, the owner manual states the ECU is a model MT05 ECU and if that is stamped Delphi, then here is a link to the service manual: https://www.trailknights.com/wp-content/uploads/2022/01/AJP-PR7-Delphi-MT05-Manual.pdf
Impressive piece of kit and very well documented compared to the rest of the machine.
 

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I found better then that, the owner manual states the ECU is a model MT05 ECU and if that is stamped Delphi, then here is a link to the service manual: https://www.trailknights.com/wp-content/uploads/2022/01/AJP-PR7-Delphi-MT05-Manual.pdf
Impressive piece of kit and very well documented compared to the rest of the machine.
The Chinese are making some really good motorcycles that have quality components and electronics.

(Oh, and I'm a member over at Chinariders.net ;))
 

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Are they talking about the RX4 over there?
With all those features and at a price of $4995.... it's keeping me up at night.
Not that I can see, but it's a pretty limited forum in that there's not much discussion about new/newish bikes.

You've probably read it, but here is a Revzilla review:
 

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Bent and worn shifter forks inside the transmission :geek: <- That's what makes the transmission shift poorly, jump out of gear etc. just incase you encounter that issue. - Part #2 and part #6 (x2) on their parts diagram at only 6 bucks each you might better order them all before you even take it apart.
 

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Discussion Starter · #68 · (Edited)
This is a SG400 RE3 engine, what came in it for an ECU and how good does it run now?
That's the one I want to talk about here, not other technologies.
SG400/ZS400 RE3 (TC380 engine) uses a standard off-the-shelf Delphi MT-05 ECU. It is easily re-flashable with free software. ECUHacker for instance.

I don't necessarily want to alter the AF ratio right now, I want to raise the artificially low rev limiter that kicks in before the red line marked on the gauges. The bike runs great above 7000rpm, and pulls strongly until the rev limiter kicks in. It makes max power at 9000rpm and the rev limiter kicks in 500rpm later. Every other motorcycle I own has at least 1000 rpm between peak power and redline, and the rev limiter is usually even higher up than that. Redline printed on the gauges is 10,000 rpm. Based on this and the way the engine is pulling right up to the hard limiter, I want to raise the limiter from 9500rpm to at least 10,000rpm. Preferably 10,500rpm. Redline at where it's printed and supposed to be, limiter kicks in 500rpm later.

But obviously it's not super critical, because I haven't messed with it yet. Lots of other projects right now.

charles.
 

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Discussion Starter · #69 ·
Bent and worn shifter forks inside the transmission :geek: <- That's what makes the transmission shift poorly, jump out of gear etc. just incase you encounter that issue. - Part #2 and part #6 (x2) on their parts diagram at only 6 bucks each you might better order them all before you even take it apart.
What is this in regards to? The SG400 shifts perfectly, there's no problem with it at all.

Charles.
 

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... I want to raise the artificially low rev limiter that kicks in before the red line marked on the gauges.
Do you have a dyno chart for that machine that suggests the engine is continuing to produce more power at those high revs? Most would have peaked and are producing less horses past a preset redline:

at what revs does your engine produce peak horsepower, that's what really matters.
 

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What is this in regards to? The SG400 shifts perfectly, there's no problem with it at all.

Charles.
One of your friends on china riders was asking about that problem, I don't frequent that site but perhaps you can be kind enough to pass that information along. Generally results from the bike being crashed on the shifter lever or stomped on by the rider. Happens with almost any motorcycle.
 

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Discussion Starter · #72 ·
Are they talking about the RX4 over there?

With all those features and at a price of $4995.... it's keeping me up at night.

View attachment 107387

Sent from my SM-T970 using Tapatalk

I've seen one in person and even sat on it. It's a nice machine. Looks very pretty. Tubeless spoked rims, TFT gauge cluster, TPMS system, readily accessible USB ports, and lots more. Everything except cruise control. The fit and finish is really nice, the paint is deep and clear with no orange peel, it has plenty of ground clearance, but it's a dash tall for my 30" inseam. The RX4 is talked about a lot on the ADVRider forum. The biggest gripe about the RX4 is the rear shock. The RX3 shock was too weak for big Americans so they doubled down and made the RX4's shock super stiff. If you're a big guy or you exclusively ride two-up, you won't mind so much. If you're not, you'll be bouncing around like you're riding a hardtail. Other than that, the NC450 engine is bombproof. The Chinese just finished the Dakar rally with modified versions of this engine, and it's been used in the Fantic Caballaro for 5 years now. Beyond a short teething period when first released (headbolts not torqued properly leading to leaky headgasket), the RX4's motor has a great track record.

That said, I'm slightly more interested in the Benelli TRK502. (Not the X-model). I'm looking for a road tourer and the 502 has a reasonably low seat height and mag wheels. The bike is also enormous. It's very comfortable for a fat or a tall guy, has excellent wind protection, and isn't much more than the RX4. The TRK502 has also been around since 2017 and has a reputation for reliability. (A Benelli with a reputation for reliability was unheard of 20 years ago!)

Charles.
 

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Discussion Starter · #73 ·
Do you have a dyno chart for that machine that suggests the engine is continuing to produce more power at those high revs? Most would have peaked and are producing less horses past a preset redline:

at what revs does your engine produce peak horsepower, that's what really matters.
The engine produces peak horsepower at 9000rpm. Rev limiter kicks in at 9500rpm. That 500 rpm goes by in milliseconds, so it's hard to shift at the horsepower peak. I keep hitting the rev limiter by accident. The rev limiter kicks in right at (or maybe slightly before) the place where I would naturally want to shift, based on the way the motor is making power. If you've ridden for very long you know the feel I'm talking about; There's a point where it feels natural to shift based on power falling off slightly. The SG400 never has a chance for the power to fall off slightly. It goes from BALLS TO THE WALLS BOYS to NOPE-NOPE-NOPE very suddenly.

Charles.
 

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The engine produces peak horsepower at 9000rpm. Rev limiter kicks in at 9500rpm. That 500 rpm goes by in milliseconds, so it's hard to shift at the horsepower peak. I keep hitting the rev limiter by accident. The rev limiter kicks in right at (or maybe slightly before) the place where I would naturally want to shift, based on the way the motor is making power. If you've ridden for very long you know the feel I'm talking about; There's a point where it feels natural to shift based on power falling off slightly. The SG400 never has a chance for the power to fall off slightly. It goes from BALLS TO THE WALLS BOYS to NOPE-NOPE-NOPE very suddenly.

Charles.
Is 58 consecutive years or riding, racing and wrenching long, yep, hitting a rev limiter continuously suggests you need better gearing. Things to watch out for if you over-clock the engine is the oil pump, it needs to be up to the task and that along with cooling limitations is usually what compels manufacturers to limit the peak revs. My F3 redlines at 15.000 horsepower peaks at 14,400 and I hit the limiter once in second gear, somewhat by accident, as you say 500rpm goes by really really fast and even faster on that. The manufacturer has tested the engines to much higher revs then that but through testing (blowing up engines on a dyno) they determine what limits go into a production road machine.
 

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Discussion Starter · #75 ·
Perhaps. But a 500 to 1000 rpm increase is a pittance, and 99% of the time I'll be well below that. I do know that CSC is playing things very conservatively and shooting for maximum reliability to try and break the stigma of Chinese motorcycles = junk.

In any case, I'll give it a try sometime before spring.

Charles.
 
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