Better charging system for XJ750?????

Is it just my dream or could it be possible to upgrade the charging system on XJ bikes, stator, rectifier, voltage regulator? I have had my eye on winter heated gear jacket liner, pants liner, and gloves, but I'm quite sure the load demand is too much for my Seca 750.

The charging system with these bikes output doesn't kick in until 2500rpm and up. So when I'm sitting at a red light nice and toasty the load demand of the heated gear would be rapidly drawing the battery down?

Is this a 3 season bike only Spring, Summer, Fall or can I sneak Winter in there also provided I can wear the right gear?

 

Hi JayEye,
According to the XJCD the XJ750P has a 22N-10/Hitachi 14V 26A @ 5000RPM charging system and the XJ650 has a LD119-08/Hitachi 14V 19A @ 5000RPM charging system.
Now which actual components are making the difference is beyond my realm of knowledge, as I only have the 750P gear, but I'm thinking it would be the stator as the brushes are attached to a cover with fins whereas the normal covers I've seen 750 and 900(non police special) are not finned.

Upgrading to the 750P charging system may be a bit of a help.

 

You're not the first one to ask, and I imagine you won't be the last. The infamous XJCD set has a link in the Electrical section to a post which listed the name and address of someone who could rewind the stock stator to put out 23 amps vs the usual 19... ah. Holcombe Armature Company.

I brought this up with our resident parts guru sometime back, and he patiently explained to me why this probably wasn't a good idea. Why is explained below.

According to Chacal, there's a reason those covers are finned -- to help dissipate heat, just like the fins on the cylinder block. This is the reason why Chacal also doesn't think much of rewinding the stator -- he says it's smaller than that on the Maxim-X (and presumably the 750P as well), and generating more heat in an enclosed space certainly can't help matters. If the stator on the750P is in fact larger than that on the Seca, upgrading wouldn't be an option. (Any chance you could measure so we could compare?)

One can certainly free up some amps by switching to an LED turn signal system and the required flasher unit, but as the turn signals are off most of the time anyway, it's debatable as to whether it would help in this situation or not.

 

This may be the answer to the charging problem? Looks interesting!

http://roadstercycle.com/Shindengen%20F ... %20kit.htm

 

I'm confused as to what that's actually supposed to accomplish. You're not going to be getting more amps out of the alternator -- maybe that's for someone who's fried their regulator/rectifier and wants a replacement?

 

No, you WON'T get more out of your stator (alternator) but you can send more to the battery to keep it charged higher, and that's where the rectifier comes into play.
It's just a suggestion but I see there will always be those who have their doubts, as always. Do what you will. I just threw it out there for those looking for an answer.

 

How about rigging up some sort of PTO to turn a separate gen' for your hot suit.

 

Ha ha, good one!
I seen an old Harley with a car alternator rigged on the side of the engine with belt drive at one of the area swap meets. I assume he figured it was easier than replacing the factory charging system.

 

i hope my r/r gets toasted so i can invest in one of these

 

Ah, okay. Gotcha. Thanks for clearing that up for me.

 

Jay, there are a couple of things that you can do to "free up" some amperage. Replace all of the bulbs in the cluster with LED also you can replace the tail lights with some led bulbs just make sure you buy some decent ones. I'll look thru some of my old posts to show you the ones I use.

Another item you might look into is the H4 bulb that goes by the name of "EcoSmart" or something like that. Should be able to pick up a little there as well