Author Topic: Lightning Alternator  (Read 5124 times)

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Offline Retro Rocket

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Re: Lightning Alternator
« Reply #25 on: April 15, 2010, 09:53:49 PM »
Quote
I prefer to lighten the crank and run a balanced, late model rotor.

Mike,could you please elaborate? Later 750 of different rotor?

Mick
750 K2 1000cc
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If You can't fix it with a hammer, You've got an electrical problem.

Offline Retro Rocket

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Re: Lightning Alternator
« Reply #26 on: April 15, 2010, 09:55:30 PM »
Quote
I wanna run a ridiculously bright headlight.

Look at HID conversion then because the Honda charging system already runs at about its limit, more powerful headlight may give you charging issues.

Mick
750 K2 1000cc
750 F1 970cc
750 Bitsa 900cc
If You can't fix it with a hammer, You've got an electrical problem.

Offline scottly

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Re: Lightning Alternator
« Reply #27 on: April 15, 2010, 10:20:07 PM »
Quote
I prefer to lighten the crank and run a balanced, late model rotor.

Mike,could you please elaborate? Later 750 of different rotor?

Mick

Mick, I found a K7 rotor was several lbs lighter than my K1 rotor. Sorry, I can't give accurate numbers, but it was definitely lighter. Also, I was reluctant to turn either rotor, as I had no way to balance, so I ran the K7. Don't know when Honda went to the lighter rotors, but I can verify that K7 was lighter than K1....
Scott 
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Offline 754

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Re: Lightning Alternator
« Reply #28 on: April 15, 2010, 10:25:19 PM »
They dropped the flange off, in 73.
 I think Mike means take the weight off the crank, rather than the rotor....not an option if we are not splitting cases.

 I have run with no rotor at times, on my 836 we welded the oil hole in the crank..
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My next bike will be a ..ANFOB.....

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Offline Retro Rocket

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Re: Lightning Alternator
« Reply #29 on: April 15, 2010, 11:51:42 PM »
They dropped the flange off, in 73.
 I think Mike means take the weight off the crank, rather than the rotor....not an option if we are not splitting cases.

 I have run with no rotor at times, on my 836 we welded the oil hole in the crank..

I have a lightened RC crank already, i was just after a lighter rotor that would charge the same or maybe better than the stock alternator as i want to run fuel injection. I will run LED winkers and tail light and HID headlight and i would also like to retain the electric start if possible.

Mick
750 K2 1000cc
750 F1 970cc
750 Bitsa 900cc
If You can't fix it with a hammer, You've got an electrical problem.

Offline seaweb11

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Re: Lightning Alternator
« Reply #30 on: April 15, 2010, 11:52:48 PM »
Will the cycleX one not work for you then?

Offline sangyo soichiro

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Re: Lightning Alternator
« Reply #31 on: April 16, 2010, 08:15:02 AM »
Mick, I found a K7 rotor was several lbs lighter than my K1 rotor. Sorry, I can't give accurate numbers, but it was definitely lighter.

I have a couple in my basement, with and without the flange.  I also have a really accurate scale.  I'll try to remember to weigh them and post the results.
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Offline MattFreeman

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Re: Lightning Alternator
« Reply #32 on: April 16, 2010, 02:29:17 PM »
Thanks for the good feedback, guys.

Offline Retro Rocket

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Re: Lightning Alternator
« Reply #33 on: April 16, 2010, 03:39:18 PM »
Will the cycleX one not work for you then?

Are they not "kick only"? I will have to go to their site and have a look..

Mick
750 K2 1000cc
750 F1 970cc
750 Bitsa 900cc
If You can't fix it with a hammer, You've got an electrical problem.

Offline seaweb11

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Re: Lightning Alternator
« Reply #34 on: April 16, 2010, 04:29:38 PM »
No! I had to remove my kick on the Tracy due to the rear sets. I'm only electric start now only.

 I went one bulb size down from stock on the headlight and it works like a charm now.
Give him a call if you have any questions. Oh yeah, Overseas...whatever. ;D



Offline sangyo soichiro

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Re: Lightning Alternator
« Reply #35 on: April 18, 2010, 12:17:18 PM »
Mick, I found a K7 rotor was several lbs lighter than my K1 rotor. Sorry, I can't give accurate numbers, but it was definitely lighter.

I have a couple in my basement, with and without the flange.  I also have a really accurate scale.  I'll try to remember to weigh them and post the results.

So here's what I got:
Both are stock and not modified in any way.  I left in the little springs and weights and the retainer for these for each.
K2: 7.0765 lb  This one has the flange.
K4: 5.8430 lb  This one is without the flange.

A difference of about 1.234 lb (that should be an easy number to remember  :)).

1974 CB 750
1972 CB 750 http://forums.sohc4.net/index.php/topic,57974.0.html
1971 CL 350 Scrambler
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My cross country trip: http://forums.sohc4.net/index.php/topic,138625.0.html

Offline seaweb11

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Re: Lightning Alternator
« Reply #36 on: April 19, 2010, 01:51:07 PM »
Ignore my earlier post. Fricken dead battery in Vancouver Yesterday!!!  ::)

Offline Ayrity

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Re: Lightning Alternator
« Reply #37 on: April 19, 2010, 01:56:48 PM »
what if you replaced a bunch of the bulbs with leds? there are easy cheap kits online with circuit boards included. less power, longer lasting lights!
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Offline 754

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Re: Lightning Alternator
« Reply #38 on: April 19, 2010, 07:55:12 PM »
So cant you jumper/push it to start.?.

Mine starts on 6 volts or less..
Maker of the WELDLESS 750 Frame Kit
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My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline seaweb11

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Re: Lightning Alternator
« Reply #39 on: April 19, 2010, 08:08:44 PM »
No Kick. Had to remove due to rear sets :P

Charged it overnight.
Slept on a friends couch, got home this afternoon.


You can't leave your bike running for 2 hours on a ferry ;D It would have died anyway.

Offline 754

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Re: Lightning Alternator
« Reply #40 on: April 19, 2010, 08:23:06 PM »
I know it has no kick. They do push start scarily easy
Maker of the WELDLESS 750 Frame Kit
dodogas99@gmail.com
Kelowna B.C.       Canada

My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline MattFreeman

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Re: Lightning Alternator
« Reply #41 on: April 20, 2010, 05:42:07 PM »
what if you replaced a bunch of the bulbs with leds? there are easy cheap kits online with circuit boards included. less power, longer lasting lights!

Lazy link? :-* :-*

Offline wannabridin

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Re: Lightning Alternator
« Reply #42 on: April 21, 2010, 06:13:44 AM »
hey Mreick or anyone else who knows...

can you "slightly" lighten a crankshaft?  i'm going to have it balanced, but is it possible to take off a little bit to help with the revs and everything?  then you still get some of the "stored" momentum of a heavier crank, but some of the pep of the lightened one...  this coupled with the lightened alternator would give you a streetable ride that would rev quicker, right??
« Last Edit: April 21, 2010, 08:56:14 AM by wannabridin »
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Offline 754

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Re: Lightning Alternator
« Reply #43 on: April 21, 2010, 07:22:41 AM »
You can cut off varying amounts.

 If yours is 73 & later it is lighter than a 72. If you lighten it too still use e-start it is  not fully lightened.

 Your riding style has a big influence on how much you should be cutting off. How much/often, do you take it to or past stock redline?
Maker of the WELDLESS 750 Frame Kit
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Kelowna B.C.       Canada

My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline Laminar

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Re: Lightning Alternator
« Reply #44 on: April 21, 2010, 07:26:26 AM »


+



=

???

Offline wannabridin

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Re: Lightning Alternator
« Reply #45 on: April 21, 2010, 08:56:00 AM »
haha, i thought the same thing when i first read the lightning part laminar!!

754, i like to ride to the limits of the motor without doing any damage.  so i'd say i do a decent amount of powershifts when i'm really hammering it!  other than that, i ride up to about 8k rpm or so.  what are your recommendations?
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Offline 754

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Re: Lightning Alternator
« Reply #46 on: April 21, 2010, 09:45:42 AM »
If you like revving, you will probably like it, moreso if you spend a lot of time over 5K

 If you like taking a 2 week trip, with a vetter, 2up, & lots of gear..you probably wont like it.

 If you are likely to gtab a handleful of R's, and are not afraid to dump/sliiiipppp  the clutch, its probably for you.

 If racing off the line and you bog, you can get revs back quicker.

 I would not run my 836 without one.

 I have also NO rotor, that is a bit different animal.
Maker of the WELDLESS 750 Frame Kit
dodogas99@gmail.com
Kelowna B.C.       Canada

My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline MattFreeman

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Re: Lightning Alternator
« Reply #47 on: April 21, 2010, 04:24:27 PM »

Offline seaweb11

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Re: Lightning Alternator
« Reply #48 on: April 21, 2010, 08:38:29 PM »
Thought I would call Cycle X today and actually ask what the output is on their lightend alt.
No one answered the phone. Suppose I will try later.

Offline wannabridin

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Re: Lightning Alternator
« Reply #49 on: April 22, 2010, 06:14:14 AM »
If you like revving, you will probably like it, moreso if you spend a lot of time over 5K

 If you like taking a 2 week trip, with a vetter, 2up, & lots of gear..you probably wont like it.

 If you are likely to gtab a handleful of R's, and are not afraid to dump/sliiiipppp  the clutch, its probably for you.

 If racing off the line and you bog, you can get revs back quicker.

 I would not run my 836 without one.

 I have also NO rotor, that is a bit different animal.

i do like to stay in the powerband with the bike, as i like to ride as aggressively as i can!

it's a one up only, i'm selfish and don't care if a girl want's a ride.  my dad's vtx1300R is the bike i use for long hauls.  and i'm working on a family friend to sell me his old gl1100...  THAT would be good for a trip or two!   ;D

i'll still need my rotor, so i'm sure it'll still be tame enough!  i guess i'll go with take a little off but balance it and the rotor.  help rev's but still keep it somewhat "friendly"
1976 CB750K, currently under construction:
http://forums.sohc4.net/index.php?topic=64468.0

-And if you don't do it this year, you'll be one year older when you do...