Power in Flux
Likes Likes:  0
Page 1 of 2 12 LastLast
Results 1 to 10 of 14

Thread: 1981 Honda CB650C Conversion

              
   
   
  1. #1
    Junior Member
    Join Date
    Dec 2011
    Posts
    10
    Post Thanks / Like

    1981 Honda CB650C Conversion

    Motor is in! Mars 0708 motor. Waiting on batteries! Putting in 60ah GBS cells from elitepowersolutions.com

    IMAG0060.jpg IMAG0062.jpg IMAG0063.jpg

  2. #2
    Member CharlesZaden's Avatar
    Join Date
    Jun 2011
    Location
    Austin, Texas
    Posts
    64
    Post Thanks / Like
    Welcome to Elmoto evguy,
    always cool to see someone else working on a cb650. (I'm currently working on a '82 myself), so I look forward to seeing the progress you make.
    What are some of the specs you're wanting to work with?
    keep posting lots of pictures and details; they really like those here .
    - Chris [1982 Honda EV650]

    "Just throwing science at the wall and seeing what sticks"

  3. #3
    Seņor Member podolefsky's Avatar
    Join Date
    Oct 2010
    Location
    Boulder, CO
    Posts
    3,889
    Post Thanks / Like
    Nice work...and welcome!

    I'm interested to see the new elite power BMS (assuming that's what you got).
    - Noah Podolefsky -
    The GSX-E

  4. #4
    Member
    Join Date
    Aug 2010
    Location
    Suffolk, England
    Posts
    47
    Post Thanks / Like
    Nice work, but it looks like you are running your chain a little too close to the swingarm, particularly where it runs under the swingarm pivot. It looks as though the chain will rub on the underside of the swingarm when the rear suspension compresses. Have you tried putting some weight on the bike to see if there is a problem?

  5. #5
    Junior Member
    Join Date
    Dec 2011
    Posts
    10
    Post Thanks / Like
    Not sure about the chain...but now you got me thinking! When I designed the motor mount, the chain loop was right in the middle of the swingarm pivot. I will compress the rear suspension tomorrow with a ratchet strap and see if the chain rubs. I do know the weight of the conversion will be considerably less than the stock weight of the original bike.

  6. #6
    Junior Member
    Join Date
    Dec 2011
    Posts
    10
    Post Thanks / Like
    Thanks for the encouragement!

    motor: ME0708 motor - 530 chain
    front sprocket: 10t rear: 46t
    batteries 48v 60ah li-ion batteries from elitepowersolutions
    controller: alltrax axe4834 controller

    From the specs you can tell I'm going for a commuter rather than a racer! I live 10 miles from work, so this is the perfect thing for me!

  7. #7
    Senior Member billmi's Avatar
    Join Date
    Aug 2010
    Location
    Palm Bay, FL
    Posts
    762
    Post Thanks / Like
    Looks like good progress. If you'e still got the engine and gearbox, you might consider making a template from the rear mount bolts to the driven sprocket, and comparing that to your motor placement. If you create a line from the original sprocket point to the center of the swing-arm pivot, if your motor's shaft is on that line, you should be in-line when the suspension is at riding compression (though you may still need to adjust the suspension to compensate for a change in weight).
    Sensei - Electric Ninja 250

  8. #8
    Member
    Join Date
    Mar 2011
    Posts
    77
    Post Thanks / Like
    Welcome to the forum. A couple of suggestions: A ten tooth front sprocket is too small. You'll have problems with noise and excess wear. Sprocket makers sell them for low speed, light duty applications

    Also, the motor should be mounted as close as possible to the swing arm to limit the (chain and bearing eating) slack-tightening-slack of the chain as the swing arm moves through its travel.

    I know you're trying to save $ by using the stock rear sprocket; but an investment in larger sprockets will save you from trouble later on. Check on the evalbum to see what others have used successfully with similar motor/bike combinations.

  9. #9
    Junior Member
    Join Date
    Dec 2011
    Posts
    10
    Post Thanks / Like
    Ok...what is the minimum size you recommend for a front sprocket? Any places you recommend to get a custom large rear sprocket?

  10. #10
    Old EV Racer EVcycle's Avatar
    Join Date
    Sep 2010
    Posts
    1,963
    Post Thanks / Like
    A 12 is the smallest I would normally go with a 530 chain.

    Sprocket Specialists can make you just about any size rear sprocket you want. Do NOT go too big.
    You will end up hitting the swing arm with your sprocket.
    EV Ed
    Never let being a responsible adult get in the way of passion and curiosity.
    Motenergy.com
    Ev album 2456, 2458, 2457, 2681, 3456, 3630, 5511, 5512

Page 1 of 2 12 LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •