Hello, I noticed last week my Monster 796 was north charging anymore. Having carried out some investigation I found that there had been some water ingress into the connector between the stator and reg/rec. when the connector went bang it burnt off about 3cm of insulation on the stator side of the connector and the wires had all been touching. Chopped off all the damaged wire and gone back to the good stuff, wired each of the 3 wires to my multimeter and measured all three variations of connectivity and found that I was getting the same reading across all variations: 23v @ 1500~1600rpm 37v @ 2000rpm 90-100v @ 6000rpm~ found it a little difficult keeping it at 6 grand with no hearing protection in the garage. I appreciate this is about 10v higher than the baselines in the Ducati tech manual, but it also says +/- 10v so I am unsure I need to be too concerned, stator seems to still be good. Used a few wago connectors to reconnect the stator and the Rec/Reg and no matter which cables I paired from each side I was getting 12.5V idling with a brand new freshly charged battery and 12.7v when revving above 3 grand. Battery was still at 12.98v after 10 on and off a with varying short amounts of tuning time, so the battery as expected for a new one is trooping along. Tech manual says I should be +/- 0.5 of 14.5v at the battery. I still need to find the connector for the Rec/Reg to the loom to check that hasn’t gone bad but the 30 amp fuse at the starter relay and the fuses in the fuse box are all good. Anyone got any ideas for where I look next? Do I potentially need to replace the Rec/Reg or is there something else I should be investigating? Thanks for any help, hope I’ve provided enough details.
Check between any of the stator yellow wires and ground. There should no connection. If it any of the windings are shorting to ground the output will be seriously compromised
Thank you, before I go poking around again, just want to check, I assume I should have continuity between all three of the yellow wires and none to ground?
Chopped off all the damaged wire and gone back to the good stuff, wired each of the 3 wires to my multimeter and measured all three variations. You should see the same on all variations so that's good. Used a few wago connectors to reconnect the stator and the Rec/Reg and no matter which cables I paired from each side I was getting 12.5V idling It doesn't matter which of the three wires goes where. So that's also good. 12.7 V isn't so good. It needs to be more than that to charge. Your output is good so it points to the reg/rec. I personally don't like the connector between stator and reg/rec exactly because of the problem you had. I replaced mine with thicker gauge cables directly from the stator and deleted the connector in the middle to avoid high resistance that comes with corrosion. A new reg/rec is not a bad idea at the same time. Loads are available. Shindengen being the best probably. I use a copy of the Shindengen and have not had a problem. Others say they're no good but it works for me on 2 bikes. I did search for a exact copy of the Shindengen. By that I mean not just nearly the same but The Same. There are subtle differences. Adapting the loom is necessary. There is a triumph adapter loom that works on a 916 and may well also work on yours. I made my own which isn't all that difficult.
Just tested and I seem to have shorting between all three of the yellow wires coming off the stator and the frame of the bike with the stator disconnected from everything else. I assume the stator is shot? Why do I still get good voltage off the stator when it’s not connected to the Reg/Rec?
Yuo are right, the stout yellow wires shorting out often results in the demise of the alternator but if you are still getting a healthy reading from output then you might be lucky.
Yes it's shot. You get a good reading across the stator windings when the reg/rec is disconnected because you are only measuring across winding to winding. When you connect the regulator you complete the path through the winding to ground and back again so the stator output is effectively shorted out. How much will depend on the resistance through the regulator.
At least you have a plan of action now - they aren't too bad to swap and price not prohibitive luckily.
Before I order a new reg and stator, do I order the Ducati parts or does someone make a better revision of them? I’ve had electrical components from electrex world before and had an alright experience.
See if others respond with as haven't replaced a stator for a while now. Yet to use this company but would be happy to:- https://www.rmstator-europe.com/en/...strada-oem-26440142b-26440143b-26440221a.html (price fluctuating for some reason as price was 132.50 Euro to begin with..) Choice of regulator is controversial as Petsmith alluded to, I don't use Electrex after my first experience but others have been happy with them.
This one works for me. https://a.aliexpress.com/_m03Yi64 It has the same aluminium back and correct bolt/casting pattern than the Shindengen part. Some of the other copies available have just potting compound on the back and the casting is different. I have no idea if this makes it a better part or if it is indeed MOSFET or not. All I know is they work well for me.
