SV Portal Forums banner

External alternator for SV1000

750 Views 5 Replies 3 Participants Last post by  LouisHulk
Ok so this is my very first write up on something but just maybe it will help someone out off the very common SV problem the magnets i know that if you use a strong glue u can fix the magnet problem but i saw an idea that REALSHELBY had here HIGH OUTPUT CHARGING SYSTEM
So when i had my probleme on magnets that broke and because i couldnt find any magnets to replace i decided to try and work around it and it is very simple to do.

So here it goes all you need is simple plate to hold the bearing i used a 20x40x10mm bearing and a 20x40x7 seal just to help the new shaft in place. the 3 holes that was holding stator i drilled through and used that to hold the bearing cover for the bolts.
Automotive tire Grey Rim Symmetry Automotive wheel system

Gas Vehicle brake Automotive wheel system Machine Circle

Rim Gas Vehicle brake Automotive wheel system Automotive tire

So then you take the flywheel bolt and copy the threats and just extent the shaft for the pulley at the outside i used EN19 steel because you need to torque the flywheel to 140nm
Hood Automotive exterior Fender Dishware Gas

Then i used a pulley that was lying around and copy that threats for the other side of the shaft for the pulley to screw on
Vehicle brake Rim Engineering Machine Auto part

Dont stress out i cleanedd the flywheel out of all the pieces of magnets so that the flywheel is ballanced
So then fitted the little denso alternator that was in the garage
Automotive tire Vehicle brake Tire Automotive lighting Bicycle chain

Wheel Land vehicle Bicycle Tire Crankset

Tire Wheel Automotive lighting Automotive tire Motor vehicle

Wheel Tire Automotive tire Light Tread

Automotive tire Tire Tread Wheel Motor vehicle

This was supposed to be just to try it out but ended up staying as is for the last 2 and some years because i didn't have a even a little bit of trouble for the bike.
I used a 1:1 ratio on the pulleys because the alternator begins to charge at 1100rpm and can handle up to 20000rpm so it wont be a problem on the bike and here are the charging numbers

At ignition on no start the battery reads 12.13 V
At idle 1200rpm the battery reads 13.46V
At 2000rpm the alternator charge fully at 14.04V
See less See more
  • Like
Reactions: 3
1 - 3 of 6 Posts
Like i said after 2years mine is running perfect without any issues and on the matter of putting some strain on the motor i don't think so because i took out the magnets and the stator so the magnetic charge the bike had is just now replaced with another similar magnetic charge and when the cover is done the pulley and alternator will be hiding so i don't think it will matter at all.
Tire Wheel Automotive fuel system Fuel tank Vehicle


See less See more
cannot say it better realshelby
1 - 3 of 6 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.