Rewind your own Rotor.....Who to buy From

650Skull

650Skull

Clan Gun
Top Contributor
Messages
11,511
Reaction score
17,817
Points
813
Location
FNQ Australia
Got this off 650Rider a couple of days ago and as there has been some discussion in a couple of threads i thought i would post this up and maybe this can be the start of a rewind thread

Right click on file.......Open in new thread........full size to read.......If you can't do that or doesn't work that way for you guys with phones, let me know and i will re-post in full size or re-post as a word post
Rotor rewind01.jpg Rotor rewind02.jpg Rotor rewind03.jpg Rotor rewind04.jpg Rotor rewind05.jpg

Llinks to reputable rewind services
Custom Rewind...2014 Pratt Hwy Birmingham AL 35214.........(205) 798-7282
http://businessfinder.al.com/850071/Custom-Rewind-Birmingham-AL
Note: Custom Rewind uses heaver gauge winding wire making the Rotor measure at 4 ohms
From this thread http://www.xs650.com/threads/another-rotor-thread.50481/#post-523673


A Caution buying from just any old seller..........A lot of good info on Rotor Run out in this thread
http://www.xs650.com/threads/dead-rotor-best-options-to-fix-replace.36211/#post-372778

For you Aussie Guys.......Brisbane area. Will do all Aus. Likes Photos of the Rotor if you want a true Quote........No Problems and Clean Rotor, about $150.00
Autolec SAL Rewinds
29 Albion St Sunnybank
Mobile 0412 462 149
20180128_144938.jpg 20180128_144952.jpg

Caution;
https://www.xs650.com/threads/first-ride-of-the-season-first-charging-system-failure.61464/
 
Last edited:
xjwmx said:
Scatter winding can be better than pretty winding where fields are involved, so might not need extreme care as long as it all fits on.
Click to expand...

Extract from the above tutorial.......................As the first layer is done just start back the other way letting the wire lay in the groove created on the first layer --/-- Measure the diameter of the coil and verify that it will fit back in the housing. If not you may have to unwind and rewind tighter or neater.
 
TwoManyXS1Bs said:
325 feet of 22 AWG solid strand (0.025")
Click to expand...
That feels like a whole lot of wire to get on there successfully. I've often wondered if regular auto electric shops could wind a rotor. If there are auto electric shops anymore. I once had one rewind an MGB alternator. They did fine. It was the cheapest thing to do. Perhaps the rotor could benefit from more durable modern insulation coating.
 
xjwmx said:
That feels like a whole lot of wire to get on there successfully...
Click to expand...

Ohboy, math.

If you figure on a nominal core diameter of 2.5", that works out to about 500 winds. Using rough numbers here, 500 winds would show a cross-section of 25x20 strands. At 0.025" wire size, that's a 5/8" x 1/2" core. Should fit.

If going to 20 AWG (0.032"). Would need 500 feet of that to get 5.1 ohms, making about 750 winds, a 30x25 core, of about 1" x 3/4". May not fit.

If doing a 4.0 ohm version of that 20 AWG, would need 400 feet, making about 600 winds, a 25x24 core, of about 7/8" x 3/4".

I'd want to paint epoxy on the thing simultaneous with the winding. Solid, no voids...
 
What epoxy to use? I've seen high temperature rated epoxies separated from the rotor and strewn all over the place on "Custom" windings before. Just any epoxy is not going to last. Anyone that can wind an electric motor can rewind a rotor, the epoxy and its application is the most important part. And......an epoxy that can withstand any solvent that might be used to clean there like contact cleaners, WD40, brake cleaners, etc.

Scott
 
I am currently running a rewound rotor from B B Bikeshop in the UK:

BB Bikeshop Ltd
Unit 20 Chiminage, Blowhorn Street. Marlborough. Wiltshire. UK. SN8 1BW
Phone: +44 (0) 1672 512240
Mobile 07502549736
Fax: +44 (0) 1672 514143
Email: info@bbbikeshop.co.uk

The resistance was bang on the Yamaha specification at 20 Celcius. After adding on the cost to post my rotor to them the total came to £108. The rewind looked good with a plastic former and a very tidy epoxy job. These rotors come with a 1 Year Guarantee. They also do rotors and stators for other bikes as well.

Ask me in a year how it is doing.

Edit - See: http://www.xs650.com/threads/rewinding-or-replacing-the-alternator-rotor-in-the-uk.51650/
 
Last edited:
I'll put a plug in for Jim. He's shipping my rotors back soon and I have no doubt they'll be top notch. He kept me (and this site) in the loop on how he was doing as he made progress on both tooling and on my personal rotors. If you look at any of his threads you'll see his OCD (his words) dictate the level of quality and thoroughness I could only hope to achieve when working on my own bikes. No, he's not paying me for this plug, lol. Buy from Jim!!!
 
2XSive said:
I'll put a plug in for Jim. He's shipping my rotors back soon and I have no doubt they'll be top notch. He kept me (and this site) in the loop on how he was doing as he made progress on both tooling and on my personal rotors. If you look at any of his threads you'll see his OCD (his words) dictate the level of quality and thoroughness I could only hope to achieve when working on my own bikes. No, he's not paying me for this plug, lol. Buy from Jim!!!
Click to expand...
Yes buy from Jim.
 
Jim does a good job rewinding. There is no disputing that. This thread was more for those not in the US to help/find some one local in your country. Jim Hadn't started his business when this thread was put together

There is a local rewind service in Australia as well as one in England that are linked to in this thread.

Although Jim's rewind are very good, ( i have got one from him), postage from the states, (even with Jim's price), it is cheaper to get one rewound locally here in Aus. Not from a retailer, this guy, like Jim, does it as a sideline

Also this thread was put together before Jim started his business, (since linked to on here, both his shop and rewind build threads) the offerings from MikesXS and other aftermarket ones were found to have run out problems, (a per 2Many's thread linked to).
 
Last edited:
Back
Top