External Alternator

[makenzie71]

Thinking crazy thoughts...it was mentioned that someone had pulled it off and I was wondering if anyone else remembered seeing it done and maybe who did it? Searching the forum for "alternator" recovers too many hits and searching "external alternator" just doesn't get enough.

If anyone remembers anything about it I would appreciate the info...especially if you can remember how it was driven.

[GQROD]

Google honda goldwing alternators, goldwing owners put auto alternators mounted externally on their rides for extra amps to run accssessories.

[makenzie71]

Not quite the same because they have a nifty belt system handy to run things like alternators and superchargers

[GQROD]

Sorry thought it would help, but if you want to run an external alternator you will have to cut a hole in the cover, extend the shaft to connect it to an alternator and finally seal the hole with some type seal similiar to the ones used to seal a hole in a firewall of a car when running wires through it.

This may not help a lot but it's my humble 2 cents.

[alton_blair]

This is a very interesting thought. If somebody could come up with a kit he/she would make alot of cash. Here is some links to the goldwing setups I found.
http://home.comcast.net/~rkekeis/Alternator/alternator.htm

http://donaldantiquerototillers.com/Alternator.html

[reddirtrider]

I big upside would be to narrow the engine substantially.

[makenzie71]

Thanks for the links. However, the GL has the advantage of having a dry shaft to attach a pully to. I can't really think of a way to do it for the GS without having oil leak issues.

Ultimately I thought it was a good idea because of the output but it's likely just not going to work. GL/CX owners have to sort stuff like that out, too, because they have to pull their engines to change their stators. All we have to do is pull a cover.

Anyone know what the amp/watt rating for the factory GS stators is?

[alton_blair]

Where there is a will there is a way. With all the bright people on this forum I could see somebody coming up with something.

[sharpy]

Graham Crosbys moriwaki 8 hour endurance kawasaki had its alternator mounted so it ran straight off the front sprocket. It was either there or the Aria 500 at Bathurst, Australia. i remember it but cant find pics. but found pics of the Yoshimura GS1000r that had the same setup. Its a model but u get the general idea.

http://images.google.com.au/imgres?imgurl=http://1.bp.blogspot.com/_uXgjvegn-Bs/SUf2vpwhPNI/AAAAAAAADY0/fxYqpDv3mnw/s400/Yoshimura%2BGS%2B1000%2BR%2BCooley-Crosby%2B1980%2B07.jpg&imgrefurl=http://racingcafe.blogspot.com/2008/12/yoshimura-gs-1000-r-endurance-cooley.html&usg=__D57hUv--aNY6-UuzlAG4APhWGKY=&h=275&w=400&sz=24&hl=en&start=20&um=1&tbnid=oSQMRqgvnhCaXM:&tbnh=85&tbnw=124&prev=/images%3Fq%3DYoshimura%2B%2BGS%2B1000%2BR%26ndsp%3D18%26hl%3Den%26sa%3DN%26start%3D18%26um%3D1

[makenzie71]

I thought about driving off the chain or countersprocket but didn't know if that saw the RPM needed to operate an alternator. Opinions?

[sharpy]

Found some.........

Have to scroll down....

http://images.google.com.au/imgres?imgurl=http://i108.photobucket.com/albums/n39/suzuki316/1980GS1000suzukawinner.jpg&imgrefurl=http://www.postclassicracing.com.au/forum/viewtopic.php%3Ft%3D2514&usg=__tS-V1if5jaKoEZrVwapJR_0wifw=&h=503&w=537&sz=128&hl=en&start=7&um=1&tbnid=4VywjwLSTn4cfM:&tbnh=124&tbnw=132&prev=/images%3Fq%3DGS1000%2BR%2Bendurance%2Bbike%26hl%3Den%26um%3D1

[reddirtrider]

I thought about driving off the chain or countersprocket but didn't know if that saw the RPM needed to operate an alternator. Opinions?

The RPM at speed isn't an issue as you could always scale it with different pully ratios to get it right. The main problem is that in traffic, at low speeds, you'd be running off the battery.

[reddirtrider]

Found some.........

Have to scroll down....
http://images.google.com.au/imgres?i...%3Den%26um%3D1

See how nice and narrow that is? Beautiful!

Yea, a cover/mounting plate needs to be developed, along with sealing that side of the crankcase. It's a great idea.

[makenzie71]

A new cover wouldn't be an issue...the current stator covers could be shaved and a plate made to bolt over them.

running off the battery I could tolerate for the most part, I just don't like the idea of dealing with traffic. I have to do that pretty regularly. I think it would stress the battery quite a bit. But I do believe that an alternator from an FC RX-7 at least would fit in that giant gap the counter sprocket is recessed in. There wouldn't be any "stepping" though...I don't believe there's enough room there for an alternator AND a transmission system.

[rustybronco]

I thought about driving off the chain or countersprocket but didn't know if that saw the RPM needed to operate an alternator. Opinions?

you can always change the gear ratio on your contemplated drive system to suit the rpm's need for the alternator.

so, what kind of wattage needs are you looking for?