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Maintenance and repair Problems, fixes, general maintenance talk

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  Topic Review (Newest First)
05-27-19 08:37
MadMel
Quote:
Originally Posted by cdenley View Post
I just ordered a stator from Triumph yesterday too. For 2 years in a row now, I missed races I was registered for because my CPS stops working in the middle of race day. I replaced the OE (I assume) one with a Rick's last year. I'm hoping the OE I just ordered will be more reliable, but based on what I've been reading, probably not. Maybe I'll order some of those cheap E-bay CPS's and replace the one on the stator I have to keep as a spare. How do you insulate the splice inside the case?

What causes these failures? Excessive heat from the stator? Poor engineering design? Any ideas for catching a CPS failure sooner? Maybe if I had checked the resistance between events, I could have caught it before it got to the point of failure? There is no ECU sensor data that could indicate a failing CPS?
I spliced in eBay ones on two stators yesterday. I had no problems sliding the old wires out of the grommet and sliding the new ones through, so I could solder the join on the outside. The insulation of the CPS wires on one was melted/fused to the stator wires inside the grommet tube, but once I separated them they came out easily. The eBay ones have a woven sheath, with one wire I had to fashion a pointy cap out of electrical tape to push it through without the sheath getting hung up.

I reused the sheath that holds the two wires together inside the cover, and put heatshrink over the soldered joins. Then I wrapped the stator wires together and the CPS wires together with electrical tape, but as two separate wraps rather than combining them, to facilitate easier CPS replacements in the future.
05-26-19 18:44
apiazza Well I swapped the whole case over with no gasket on it just to confirm spark. Indeed I had spark!

Got the new gasket installed, plugs reinstalled and rigged the tank back on with the airbox still off and she fired right up. Big cloud of white smoke as I expected but seemed to burn off pretty quick. Got most of it back together but just waiting on replacement sleeve and bolt for the tank pivot. They were pretty bent so I just ordered new ones.

Sent from my SM-G965U using Tapatalk
05-24-19 08:02
MadMel
Quote:
Originally Posted by cdenley View Post
I just ordered a stator from Triumph yesterday too. For 2 years in a row now, I missed races I was registered for because my CPS stops working in the middle of race day. I replaced the OE (I assume) one with a Rick's last year. I'm hoping the OE I just ordered will be more reliable, but based on what I've been reading, probably not. Maybe I'll order some of those cheap E-bay CPS's and replace the one on the stator I have to keep as a spare. How do you insulate the splice inside the case?

What causes these failures? Excessive heat from the stator? Poor engineering design? Any ideas for catching a CPS failure sooner? Maybe if I had checked the resistance between events, I could have caught it before it got to the point of failure? There is no ECU sensor data that could indicate a failing CPS?
Just as a heads up, one of my failed CPSes had a perfectly good impedance. A multimeter will often catch a failing CPS, but not always.
05-23-19 18:00
apiazza Sounds like a flawed general design. Obviously it does handle constant vibration well. I dont recall what my gsxr had when I replaced the stator on it.

I ordered an Ebay one but lead time is long. Going to swap the donor one over to hopefully get me to the track next weekend. When I get this one apart I'll give some thoughts on splicing. What I'm hoping to do is snake the wire through the factory boot and splice outside the case. If it has to be done inside I'll probably use multiple layers of shrink tube to protect it.

Sent from my SM-G965U using Tapatalk
05-23-19 16:16
cdenley I just ordered a stator from Triumph yesterday too. For 2 years in a row now, I missed races I was registered for because my CPS stops working in the middle of race day. I replaced the OE (I assume) one with a Rick's last year. I'm hoping the OE I just ordered will be more reliable, but based on what I've been reading, probably not. Maybe I'll order some of those cheap E-bay CPS's and replace the one on the stator I have to keep as a spare. How do you insulate the splice inside the case?

What causes these failures? Excessive heat from the stator? Poor engineering design? Any ideas for catching a CPS failure sooner? Maybe if I had checked the resistance between events, I could have caught it before it got to the point of failure? There is no ECU sensor data that could indicate a failing CPS?
05-22-19 21:55
apiazza I'll confirm it again, but I'll probably take your advice and order a couple CPS and replace. I have a little bit before my gasket shows up anyway.

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05-22-19 20:03
MadMel Haha, yeah that ain't good. With respect to the second CPS, normal impedance is about 220 ohms, so they might both be pooched.
05-22-19 18:53
apiazza
Quote:
Originally Posted by MadMel View Post
Forum user Far Canal has recommended this one that you'd have to splice in, which is way cheaper than buying a new stator / CPS. I've ordered a couple of them, but haven't used them yet. Personally, I haven't had great luck with the CPS from either OEM or aftermarket stator / CPS units. If your spare works, might as well use it. But I'd splice a new CPS onto the old one, and bring it to the track in case of emergency. All that is assuming that the CPS is actually the problem with your bike, of course.

https://www.ebay.com/itm/222603501414
Put the multimeter to both. One in bike currently clocked about 580,000 ohms. One in spare was about 500 ohms. I'm gonna go ahead and say it's bad lol.

That Ebay sensor is substantially cheaper than the Rick's, even for just the sensor...by a lot. Rick's wants $75.

Sent from my SM-G965U using Tapatalk
05-22-19 17:00
MadMel Forum user Far Canal has recommended this one that you'd have to splice in, which is way cheaper than buying a new stator / CPS. I've ordered a couple of them, but haven't used them yet. Personally, I haven't had great luck with the CPS from either OEM or aftermarket stator / CPS units. If your spare works, might as well use it. But I'd splice a new CPS onto the old one, and bring it to the track in case of emergency. All that is assuming that the CPS is actually the problem with your bike, of course.

https://www.ebay.com/itm/222603501414
05-22-19 09:35
apiazza
Quote:
Originally Posted by MadMel View Post
Don't know if yours is OEM or aftermarket but some of the aftermarket CPS connectors don't latch very well to the harness (or at all, in the case of Caltric). I loop a cable tie around it, between the wires on each end, to hold it together.
Happen to have a part number? I cant seem to find it in the exploded image diagrams online.

Edit: Disregard I realize now its part of the stator part number. I have a spare donor motor that i will check for good sensor. Do the aftermarket hold up better or should I just use the one I have available?

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