Continuing - So what did you do to your bike today...?

[grog]

hope it was cheap. one here on Gumtree $150, i thought way overpriced. 

[lurch]

Not the 1400 but it's still a Suzuki (DR650). I hate auto electrical but I'm actually happy to finally be up to investigating a minor fault. 

I haven't spent any time in my shed since leaving for an adv ride at the start of April and coming home 3 weeks later, less one bike and a little worse for wear. The dog normally gets a bit freaked out by the noise and swearing but she was keeping an eye on me and refused to leave my side in there today.

Went back to work on light duties last week too. After 3 months with only physio, hand therapy and Netflix to keep me occupied it was great to get out of the house for something other than a medical appointment.

[Eric GSX1400K3]

Well,  new injectors did not resolve my issue. Bonus is though, a set of $40 injectors work, fired up first go. Still runs rough as, coughing and spitting, backfiring etc.  So today I went through all the sensors that control fuelling.  Pump primes fine, no more debris in the teabag and external hp filter is also clean.  IAP and IAT both read fine.

Checked cam sensor, reads fine, Removed it no muck on it.  Checked TO sensor, reads fine. Checked crank sensor as per manual, reads fine at the coupler. 

Removed the crank sensor to see if i could get a reading at the pick up from the crank.

Found this, magnet is in three pieces.  I believe this is not good. Can anyone confirm?

Also, I checked the webike Japan site, the signal generator part no is 33110-31F01 according to suzuki parts fiche. Can anyone confirm that this would include the plate plus the magnet and pick up?

As everything else is reading within spec, I tend to think this is the source of my issue with rough running.

Running out of ideas otherwise.  Next step is to pull the cam cover and start looking at valves and mechanical issues, which i think is unlikely.

[KiwiCol]

I'm no help Eric, I know Snapey glued magnets back in place on the stvs & that worked ok.   Wonder if you could do the same with those bits?  Then if it runs ok, you know that's the piece you need to renew.

[Eric GSX1400K3]

I'm no help Eric, I know Snapey glued magnets back in place on the stvs & that worked ok.   Wonder if you could do the same with those bits?  Then if it runs ok, you know that's the piece you need to renew.

Cheers Col, the magnet was captive in its bracket as 1 piece, as soon as I undid the bracket screws, the pieces fell out.  I think even if I glued them, the magnetic field that its putting out will not be full strength.  It is my understanding is that the magnet field strength is needed in full to make the pickup at the crank work correctly.  The sensor at the crank spins, and as the tip passes through the magnetic field, this induces a voltage in the coil, this tells the ECM where the crank is.  Our crank rotors have different length prongs, I believe that's for the factory standard ignition retardation in the lower gears.

To me, if the magnetic field is not strong enough, the voltage induced in the coil is not enough and the ECM does not know precisely when to fire the injector. Unfortunately, I don't know how I can measure the voltage in the coil when cranking, so it seems that only a new signal generator plate will tell.  Issue is, does the new signal generator plate come with a new coil and magnet.  The parts fiche shows this as an assembly, including the signal cable, coil and so on, so I believe it does.  Will call my local Suzuki dealer and ask, and also send an email to Webike Japan. 

[GSXKING]

I'm curious to know how the magnet broke apart 🧐
Is it a common occurrence ?
If so this is the first time I've heard of it 😎

[grog]

Eric. EBay item no. 293215224301
Just a bit cheaper than oem $350😎 Fits lots of diff model bikes, outboards, mowers etc.

[Eric GSX1400K3]

I'm curious to know how the magnet broke apart 🧐
Is it a common occurrence ?
If so this is the first time I've heard of it 😎

same here, I've heard of the STVA magnet breaking (aka Snapey's post about glueing it back together), but never the CKS sensor magnet.  Just rang my local dealer, same price as Mick Hone 350 plus freight, no stock in AU, 6 week wait.  She did say though their parts fiche shows the whole assembly, so it should be supplied with magnet and coil and lead.

[Eric GSX1400K3]

Eric. EBay item no. 293215224301
Just a bit cheaper than oem $350😎 Fits lots of diff model bikes, outboards, mowers etc.

cheers mate, that is cheap, about 50% of the Webike Japan price including freight.

[grog]

Parts/ accessories searching is necessary, we get robbed in Oz. Last helmet, Chinese LS2.Around $500 Oz shops. I bought Chinese direct $120 delivered,they offered far better colour choice as well. 30 days was here.

[Eric GSX1400K3]

Eric. EBay item no. 293215224301
Just a bit cheaper than oem $350😎 Fits lots of diff model bikes, outboards, mowers etc.

hmm, quality seems a bit dodgy from the photo, magnet is painted same as the plate, and its galvanise, not zinc plated, leaning to the genuine webike only from Japan

[Eric GSX1400K3]

So I glued the magnet back together and glued it to the little base plate. The magnet went back together without splits or cracks. I figured no harm in giving that a go.  Refitted it and tried to start the engine, took a bit but it ran. Rough at first but got better as it warmed up. Interestinglythe STVA did not appear to activate. Throttle response seemed to be back to normal once engine was at temperature.

Idle was steady at around 1100rpm, so I thought all good.  Shut it down and tried a restart, back to rough running, coughing and clearly not running evenly on all four cylinders.  Also noted an irregular clunk that seems to be coming from the gearbox. The bike is on its paddock stand, so I put it in gear and let the clutch out, clunk less but still there.

My next step is to do a compression check  plus I will recheck all sensors again.  After that I intend to remove the cam cover and perhaps the head, checking for mechanical issues.

Running out of other ideas at this point.

[Tony Nitrous]

Ordered an aftermarket RF900 fuel pump.

Wasn't as cheap as the EBay ones direct from China but it's though a local store. I can check the plug and fitting when I collect it and return it if there's any drama. Still a fraction of a genuine one's price and will let me test the bike before I either break it up or invest more in it.

[Pommeroy]

So I glued the magnet back together and glued it to the little base plate. The magnet went back together without splits or cracks. I figured no harm in giving that a go.  Refitted it and tried to start the engine, took a bit but it ran. Rough at first but got better as it warmed up. Interestinglythe STVA did not appear to activate. Throttle response seemed to be back to normal once engine was at temperature.

Idle was steady at around 1100rpm, so I thought all good.  Shut it down and tried a restart, back to rough running, coughing and clearly not running evenly on all four cylinders.  Also noted an irregular clunk that seems to be coming from the gearbox. The bike is on its paddock stand, so I put it in gear and let the clutch out, clunk less but still there.

My next step is to do a compression check  plus I will recheck all sensors again.  After that I intend to remove the cam cover and perhaps the head, checking for mechanical issues.

Running out of other ideas at this point.

I hope you get to the bottom of this Eric. I'd love to assist, but you're in deeper and murkier waters than those in which I can comfortably swim.

[grog]

Sure is being a mongrel Eric. I cant see anything to gain removing cover or head. I know fuel stuff all new but maybe pressure&flow test to check? So strange no codes& ok one minute not the next.Almost sounds like a dodgy connection somewhere🤷