Technology ...

[Seeker]

Originally Posted by Othen

I must have Suzuki Easy Start System on my K6 (I have soldered the two wires that normally go to the switch on the clutch lever to short them out permanently - I’ll decide when this thing starts, not the bike)

be aware, though, that bypassing the clutch switch (on a pointy) alters the way the ECU functions and can cause stalling when coming to a stop.

Originally Posted by Seeker

be aware, though, that bypassing the clutch switch (on a pointy) alters the way the ECU functions and can cause stalling when coming to a stop.

Thank you, but that has never happened.

Looking at the wiring diagram, it is hard to see why that could possibly be the case. It is just a one way switch that runs between the starter relay and the negative return ring, I cannot see any circumstance when having a complete circuit would cause the motor to stall. Is there any theoretical or empirical basis for your warning?


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[Seeker]

This subject has popped up a few times and follows two paths:
1) "I've done it and my bike works fine"
2) "My bike has begun stalling at roundabouts".


here's a thread from a while back
http://forums.sv650.org/showthread.p...76#post2617276
and another showing both thoughts:
https://forums.sv650.org/showthread.php?t=155160


another long thread:
https://www.svrider.com/forum/archiv...p/t-95727.html


Here's another link...
https://www.svrider.com/forum/showthread.php?t=236249


this subject pops up a lot...

Whilst correlation does not imply causation, a few people have complained about stalling/cutting out after a sudden stop, all had the clutch switch bypassed. When clutch switch reconnected problem disappeared, it might be coincidental. If your bike is running ok, great you can leave it as is.

Originally Posted by Seeker

This subject has popped up a few times and follows two paths:
1) "I've done it and my bike works fine"
2) "My bike has begun stalling at roundabouts".


here's a thread from a while back
http://forums.sv650.org/showthread.p...76#post2617276
and another showing both thoughts:
https://forums.sv650.org/showthread.php?t=155160


another long thread:
https://www.svrider.com/forum/archiv...p/t-95727.html


Here's another link...
https://www.svrider.com/forum/showthread.php?t=236249


this subject pops up a lot...

Whilst correlation does not imply causation, a few people have complained about stalling/cutting out after a sudden stop, all had the clutch switch bypassed. When clutch switch reconnected problem disappeared, it might be coincidental. If your bike is running ok, great you can leave it as is.

That was incredibly kind of you to take the time to forward the background stuff. When I have a mo (it may not be until the weekend) I’ll read through the previous threads.

The original owner had bypassed the switch some years ago (with a scruffy 5A connector crimped on with pliers - my input has been to solder the joint neatly and seal it with heat shrink tube). He did not mention any problem with stalling and it has not happened in my ownership - remember this is a 135,000 mile bike that still runs really well (it might pass for a 35,000 mile bike if one didn’t see the odometer).

I did think about fitting a new switch and putting the bike back to standard (which I generally like) before soldering the joint, and I did consult the wiring diagram to make sure I was not doing something daft (electrically). I concluded then (and I still think so now) that the switch cannot affect the running of the bike apart from disabling the starter solenoid (which I like - I don’t need the bike to tell me when I may press the starter button, if I get it wrong it is no one’s fault but mine).

I’ll read through the links you have kindly forwarded, but my feeling is that all the bikes probably had something else wrong with them at the time, and that was not unconnected with their owners shorting out the clutch switch, so it will not have been entirely coincidental that they had stalling problems that had not been noticed previously.

Thank you again. I really do appreciate you taking the time over this, and I enjoy researching SV650 stuff - my bike being a project (that has turned out rather better than expected, and I rather enjoy the bragging rights of it having covered a much higher mileage than virtually everyone else).

Best wishes,

Alan


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[Seeker]

you're welcome. I couldn't find it at the time of the last post but here's a thread (from the Triumph 675 forum) quoting a Keihin document. Suzuki (and Triumph) use Keihin ECUs.


https://www.triumph675.net/forum/showthread.php?t=52296

Originally Posted by Seeker

you're welcome. I couldn't find it at the time of the last post but here's a thread (from the Triumph 675 forum) quoting a Keihin document. Suzuki (and Triumph) use Keihin ECUs.


https://www.triumph675.net/forum/showthread.php?t=52296

I’ll look forward to some interesting light reading (I should get out more).

I may be temped to put this back to standard just to see if it makes any difference whatsoever (I suspect it will not).


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[Talking Heads]

I'd rather have mudguards than "advanced technology"
The one press starter is a good thing, it fully automates the starting process taking human error out of the equation, but for me the low rpm assist is a useless gimmick because you can still stall it.

[keith_d]

Easy start system - connect a relay to the neutral light which shorts the clutch switch when you're in neutral.

[Talking Heads]

Originally Posted by keith_d

Easy start system - connect a relay to the neutral light which shorts the clutch switch when you're in neutral.

There's a lot more to it than that, the starting is fully controlled by the ECU.

[Scittyf]

Could it be that when the clutch is pulled in the ECU compensates by increasing rev's as a slight anti stall measure.

So how does the ECU do that? Does it just increase the amount of fuel going into the cylinders? Ie running slightly rich? Or does it do so by adjusting the air through the throttle body?
If its the later maybe something was slightly wrong with the throttle and thus just meant the engine got sudden hit or too much fuel or too much air causing the bike to stall.

Too much air vs fuel will raise rev's but give less power. Where as too much fuel will potentially bog the engine down slightly.

I can see why it might cause an issue if the circuit is open?