As posted in the Newbies section I have acquired a 916 Biposto, 1997. Grateful for some help and advice: As part of putting it back on the road have been giving it a good clean and checking things out (using old threads in this forum has been ever so helpful) Need some advice about the charging system. Have given it a good going over and the wires from the stator to the Regular/Rectifier appear fine. The dodgy plastic connector has been replaced by some good quality spade Terminals by a previous owner and they are in good condition without any corrosion. As part of maintenance thought I would check out the charging voltages and though the regulated voltage at the battery terminals is fine (about 13.7- 14 volts at 3000 revs) the unregulated voltages are very dodgy at all rpms. These are as follows: 24v at 1500 rpm 50v at 3000 rpm 80v at 6000 rpm Have checked the stator wires using a multimeter and all looks fine ie no continuity between terminals and earth and about 0.5 ohms resistance between the two yellow wires. The charging lamp flickers a bit but goes off fairly quickly. Just wondering should I be doing something about the stator or leave it well alone for the moment? Thanks!!!
The stator is not know to cause any problems and is a reliable part. Most of the time the regulator fails. You could swap te R/R for a more reliable mosfet type and be done with it.
The two or more yellow wires from stator to RR can cause problems too. The plastic connecter is a weak spot and can get very hot and char. You can get these wires replaced with bigger core. Apparently, any connection is a weak spot as it adds resistance. I have a regular RR from Electrex on mine for the moment. I'll swap it for a mosfet once this one fails. It will fail. Ive put 4 on my 916 in 20yrs. The one that's on now was a spare I used to keep under my seat. Look after the battery too. I can't count how many of those my 916 has gobbled up. I should fit a mosfet one now and have done with it. Mines a 98. It is its only foible.
These figures from the alternator are about right. They are reckoned to put out about 15Vac per 1000 rpm. Sounds good to me.
I bought a R/R from a panigale last week for 50€. (2nd hand) Bought the triumph loom, for 27€ plug and play. Soldered the stator wires though. All done and don’t need a spare on the long European trip anymore
I’d say the Haynes is ‘slightly’ adrift at 140v. @Derek is correct in his post above . IMO, you’ve nowt to worry about it.
Well that's a relief! Was thinking the stator was knackered.. Will get a Mosfet R/R tho. Any recommendations bedides Shindengen? Thanks
Buy one from the newer models panigale, multistrada etc. The triumph loom and its plug and play. R/R part# FH020AA Triumph part# T2500676
Not quite. The 916 has a single phase alternator with only 2 wires, not a problem you just leave nothing connected to the other regulator input terminal. I can't recall off hand but I think the 916 regulator output connector is different from the later 3 phase ones too. It would be easiest to change the loom connectors to these. https://kojaycat.co.uk/epages/950000457.sf/en_GB/?ObjectPath=/Shops/950000457/Products/KYG3W-GREY https://kojaycat.co.uk/epages/950000457.sf/en_GB/?ObjectPath=/Shops/950000457/Products/KYG3WB-BLK
Not Quite, Single fase, yes, just leave nothing connected, just as you say. I wouldn't use the connector, for the stator wires as its prone to melt down, corrosion etc. Just solder the wires directly on the triumph loom. Yes, you need to cut the connector from the new triumph loom. But than again, you get a reliable connection. The connector to the battery, 2 wires I use the connector. Anyway its just how I did it, and everybody is free to do their own. Cheers
Bike side of the loom: Red plugs into positive of of old rectifier. White/Red is the charge warning lamp wire. Brown seems to plug into negative (black wire on plug below) of the old rectifier. Black wire with the ring terminal is earth on the body of the old rectifier. Rectifier side of the loom: Where do the positive and negative outputs of the new Rectifier go? Do I just attach the positive wire from the new R/R unto the positive on the bike loom? What happens to the Brown wire and the black with the ring terminal on the bike loom? For reference here is the wiring diagram of the bike. The brown wire seems to go into the Fuse box. Also, am I right in assuming that the function of the charge warning lamp is lost? An idiots guide to wiring the new R/R would be great. Gratefulfor all the help. Thank you!
The -ve of the new regulator goes to the battery negative. Fit a new wire if necessary. The +ve to the 2 reds which are currently into a single terminal. Don't connect anything to the brown or white wires. And yes, you will lose the warning light function
There was a Ducati cable assembly for connecting up 2 phase models, but cannot find any reference to it as I guess it's an old part number. Cable for £15 if anyone is interested.
If the new Rectifier is fitted in the same position ie under the battery are the Triumph loom wires long enough to hook up to the battery terminals and Stator wires (on mine the stator wires just long enough to reach the battery holder)? Thanks
Thank you. Have managed to source a Multistrada rectifier for £55 on eBay and the loom for £24 posted from Fowlersparts.co.uk. Will also be wiring in a small voltmeter from eBay like this one (only £2.66 posted) https://www.ebay.co.uk/itm/Mini-Vol...-/164689147159?_trksid=p2349624.m46890.l49292
I thought I'll post some pics and a basic Diy guide whilst replacing the stock rectifier on my 916 with a modern one. FH020AA from a 2016 Ducati Multistrada or similar (£55 used from eBay) and the Triumph wiring loom (Triumph part# T2500676, £24 Posted from Fowler's Parts) https://www.fowlersparts.co.uk/parts/view/T2500676 The loom dissected and the additional wire removed from the alternator side plug (left side) which I don't need for my 916 single phase alternator (I used the yellow blanking plug from the battery side plug (right side) and swapped it to the alternator side plug to blank off the middle). The two plastic connectors are not needed. As you will see the the brown and black wires on the battery side plug split into two. I plan to cut the spade connectors off and crimp the two brown and black wires into M5 5.4mm ring terminals which will connect directly to the battery but with maybe a 30amp fuse in the positive lead (I don't know whether this is actually needed but remember reading somewhere this is sensible). Alternatively the brown wires can be connected to the red wire on the bike side of the loom with a male bullet connector (read below). Also will put heatshrink to seal and insulate any bare wiring. https://www.ebay.co.uk/itm/High-Qua...-/131891619483?_trksid=p2349624.m46890.l49292 I already have good quality female spade connectors crimped onto the two wires coming from the alternator (done by a previous owner) so the wires on the alternator side plug of the rectifier which already have the male connectors crimped onto them will connect directly and will heatshrink them. The wire with the earth terminal from the original loom on the bike will just go under one of the mounting bolts of the new Rectifier. The connector with the brown wire and white/red on the bike side of the wiring loom is redundant. The red wire (+ve) can alternatively be hooked up to DC output (brown wire) of the new Rectifier with a male bullet connector. This (I believe) will automatically send the charging current to the battery via the large 30amp fuse mounted on top of the starter relay and to the right of the battery. Once I mount it up and finish connecting everything up will post more pics. Ignore these ring terminals below. For some reason I can't seem to be able to delete the image.
