BMW K bikes (Bricks)

You are not connected. Please login or register

View previous topic View next topic Go down  Message [Page 1 of 1]


1Back to top Go down   Alternator weight Empty Alternator weight on Wed Jun 24, 2020 11:25 pm

Bedlam.Bambi

Bedlam.Bambi
active member
active member
Would anyone be able to tell me if there’s a weight difference between the various K engine alternators?
I have a 50 amp but wouldn’t mind switching it out for a 32 if those are lighter...

    

2Back to top Go down   Alternator weight Empty Re: Alternator weight on Thu Jun 25, 2020 1:33 am

Point-Seven-five

Point-Seven-five
Life time member
Life time member
According to the MAXBMW parts fiche, the 50A weighs 12.24lb and the 32A weighs 7.05lb.


__________________________________________________
Present:
1994 K75RT
1991 K100RS
1988 K100RS SE

Past:
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

3Back to top Go down   Alternator weight Empty Re: Alternator weight on Thu Jun 25, 2020 5:10 am

BobT

BobT
Life time member
Life time member
That would be a weight saving of about 2 kgs, the same as 2.5 litres of fuel. Best to put less in your tank or get rid of that huge tractor battery that most Ks use.

    

4Back to top Go down   Alternator weight Empty Re: Alternator weight on Thu Jun 25, 2020 2:29 pm

Bedlam.Bambi

Bedlam.Bambi
active member
active member
That’s awesome! Thanks for the info Smile
I’m slowly “pre” assembling the bike and was surprised by how heavy the thing is. Truly an automotive piece...

Yes, it may not be worthwhile for most but I’ve reached a point in weight savings where I‘m having to take a look at any essential components..

    

5Back to top Go down   Alternator weight Empty Re: Alternator weight on Thu Jun 25, 2020 3:34 pm

chris846

chris846
Life time member
Life time member
Dunno if you've considered a lithium iron battery, but the first time I picked one up I just laughed - it was so light.


__________________________________________________
Sometimes I'm not really Suzi Quatro.
    

6Back to top Go down   Alternator weight Empty Re: Alternator weight on Thu Jun 25, 2020 4:05 pm

Bedlam.Bambi

Bedlam.Bambi
active member
active member
Definitely! I’ll be using an Antigravity lithium ion that weighs 2lbs 4oz according to specs and it’ll have a highly simplified electrical system once completed.

    

7Back to top Go down   Alternator weight Empty Re: Alternator weight on Thu Jun 25, 2020 8:41 pm

Two Wheels Better

Two Wheels Better
Moderator
Moderator
I've been using a 12 amp Li-ion in Big Block since new - five years - and it has never lost any juice, weighs 3 lbs - stock was nearly 14 lbs. I use a lithium-specified charger (no pulse, which works well on AGM or FLA, but shortens the lithium cells' lives) on it about three times a year.


__________________________________________________

Sometimes I lie awake at night, and I ask, "What can I do to keep my life from going by so fast?" Then a voice comes to me that says, "Try slowing down at the corners." 

~Charlie Brown

1970 R60/5, '77 R75/7-R100, '85 K100'87 K75C, '87 K100RS, '93 K11-K12 Big Block, '93 K1100RS, '95 R100-Mystic, '96 K1100RS, '98 K1200RS, '00 K1200RS, '02 K1200RS, '03 K1200GT, '04 R1150R'04 R1150RT, '05 K1200S, '06 K1200R, '07 K1200R, '09 K1300GT & 2013 R1200RT-Polizei  - Beemers owned still or sold.

    

8Back to top Go down   Alternator weight Empty Re: Alternator weight on Thu Jun 25, 2020 9:45 pm

Bedlam.Bambi

Bedlam.Bambi
active member
active member
Good to know, thanks for the info!
Also, many thanks for your Big Block K thread, it’s very informative and has been really helpful while swapping mine.

    

View previous topic View next topic Back to top  Message [Page 1 of 1]

Permissions in this forum:
You cannot reply to topics in this forum