honda305 Home honda305 Auctions honda305 Gallery honda305 Forum


honda305.com Forum

Login
□ Search
□ FAQ 
□ 
Vintage Honda Owners,
Restorers, Riders and
Admirers

How to run a CB77 without a battery?

Charging System, Wiring, Lighting
Post Reply
56_oval
honda305.com Member
Posts: 277
Joined: Sun Oct 24, 2010 2:37 am
Location: Dallas, TX

How to run a CB77 without a battery?

Post by 56_oval » Thu Apr 05, 2012 1:34 pm

Just what it says. Is there a way? And I'm not talking about using one of those little boxes, I mean completely batteryless. Kickstart only and electrics run off of stator...

User avatar
davomoto
honda305.com Member
Posts: 2508
Joined: Sat Nov 18, 2006 7:36 pm
Location: Marin County CA

Post by davomoto » Thu Apr 05, 2012 2:34 pm

I've done it with a computer grade capacitor, but haven't managed to get a working headlight yet. The excess power from the stator needs to go somewhere, so the "battery eliminator" fills that need.

Davo

User avatar
Hotshoe
honda305.com Member
Posts: 298
Joined: Tue Mar 30, 2010 12:51 pm
Location: Nawlins

Post by Hotshoe » Thu Apr 05, 2012 4:58 pm

There's a way to convert a stock 305 dyno (with battery) to a magneto (no battery).
I had a racer in the 60's that had one and the bike in the photo has one.
Don't know how it's done or if that would accomplish what you're trying to do.
If you're interested, my pal who owns the bike and I had talked about reverse engineering it next time I'm out in SoCal, maybe next month.
Attachments
Eugene's flattracker 2 - Copy.JPG

56_oval
honda305.com Member
Posts: 277
Joined: Sun Oct 24, 2010 2:37 am
Location: Dallas, TX

Post by 56_oval » Thu Apr 05, 2012 5:05 pm

I'd love any info available. Did you convert that bike to right hand shift as well? If you could fill me in on that as well, that would be awesome. After the wreck, the left foot doesn't work so well...

User avatar
Hotshoe
honda305.com Member
Posts: 298
Joined: Tue Mar 30, 2010 12:51 pm
Location: Nawlins

Post by Hotshoe » Thu Apr 05, 2012 10:34 pm

I'll let you know what I find out about the magneto conversion.
Sorry about your foot but I'm not sure if the right side shift is a practical conversion.
It was originally done for a flat track engine (turn left, go fast, repeat), I'll ask the current owner if he knows anything about it.
Bill Engvall thought of the day..... how about converting your Superhawk shift linkage to a hand shift?

User avatar
brewsky
honda305.com Member
Posts: 1816
Joined: Wed Jul 23, 2008 5:21 am
Location: Princeton, WV

Post by brewsky » Fri Apr 06, 2012 6:08 am

Haven't tried it myself, but worth a look:

http://www.oregonmotorcycleparts.com/BEC.html
66 dream, 78 cb750k, 02fz1, 09 wing

mike in idaho
honda305.com Member
Posts: 411
Joined: Sun Jan 29, 2012 9:18 pm
Location: orofino, idaho

Post by mike in idaho » Sat Apr 07, 2012 10:08 am

Hotshoe wrote:There's a way to convert a stock 305 dyno (with battery) to a magneto (no battery).
I had a racer in the 60's that had one and the bike in the photo has one.
Don't know how it's done or if that would accomplish what you're trying to do.
If you're interested, my pal who owns the bike and I had talked about reverse engineering it next time I'm out in SoCal, maybe next month.
I did it with a pair of Honda 50 coils and re-wiring the alternator. You need to separate the connections in the alternator harness and re-wire it to combine one daytime coil and one lighting coil to run each side. I used the early Honda a/c type ignition coils and oversize(Mallory) condensers. The spark advance needs to locked at full-open, so the magnets in the rotor are lined with the stator coils when the points open, to get the most spark energy. With the advance working it's almost impossible to kick start.
'65 YG1
'65 CB160
'66 CL160
'66 CL77
'78 XS650
'79 GL1000
'69 T100R
'68 TR6
'69 T120
'72 750 Commando
my company car is a Kenworth

Post Reply




 

CB-77 | CYP-77 | Road Test | Riding Log | Literature | Zen | Marketplace | VJ Survey | Links | Home