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1Back to top Go down   Camshafts for 16 valve engines Empty Camshafts for 16 valve engines Fri Aug 26, 2016 7:29 pm

AL-58

AL-58
Life time member
Life time member
Has anyone seen a list identifying the valve timing for the different 16v camshafts.
To my knowledge (please correct me) There are 4 variations:
-K1/16VRS,
-K1100LT and RS(same),
-K1200LT,
-K1200RS

I'm picking up a 1200 engine that needs cams.  I have some spare 1100 camshafts, but I also have the option of pulling the cams from the 16v K100RS.

The 1200 is intended for the sidecar so torque is more important than max power.  It hardly ever gets run over 5000rpm and to be honest, even that's rare.

Al


__________________________________________________
'08 F650GS (798cc)
'19 R1250RS

+ another boxer engined motorcycle and sidecar

"When I'm too old and too foolish to handle a sidecar I'll buy a Sportsbike"

Camshafts for 16 valve engines K-dogs10
    

2Back to top Go down   Camshafts for 16 valve engines Empty Re: Camshafts for 16 valve engines Fri Aug 26, 2016 8:59 pm

K75cster

K75cster
Life time member
Life time member
Charlie had a post in a thread about 2year ago with the different openings and closings. Hope he can remember where it was or he can put his finger on it at home, But it is in here somewhere.


Also the resto thread of JJ COBAS that motorbike Mike did has some discussion on it



Last edited by K75cster on Fri Aug 26, 2016 9:02 pm; edited 1 time in total (Reason for editing : forgot the cobas)


__________________________________________________
Keith - 1987 K75c with r100rt replica fairing and half of a 1984 K100rt 1992 K1100LT a blue one

The Clever are adept at extricating themselves from situations that the wise would have avoided from the outset - QUOTE from david Hillel in Out of the Earth.
    

3Back to top Go down   Camshafts for 16 valve engines Empty Re: Camshafts for 16 valve engines Fri Aug 26, 2016 9:30 pm

Rick G

Rick G
admin
admin
I have a chart of the 1100 cams for EU and AU the AU cams are CRAP (I'll post it if I ever find it) the inlet opens 20° later than the EU cams and that is absolutely disasterous for low end torque. Try to get a set of cams from Germany Ebay.de they are called nockenwellen. I also ran a K100 staintune with the longer K100 header pipes which brings the bottom end torque up and advance the timing 4° and you will be amazed at how much better it is to ride. On my K1100 all I have done ATM is 4° advance and it is a really big improvement.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1999 K1100 LT with a Big Block 1200
    

4Back to top Go down   Camshafts for 16 valve engines Empty Re: Camshafts for 16 valve engines Fri Aug 26, 2016 10:12 pm

charlie99

charlie99
VIP
VIP
some one posted this ...cant decide if its accurate or not as I haven't played with many 16 valve machines at all \
but I would suggest there is probably some differences


Camshafts for 16 valve engines Cam_ti10


markyboy had both an rs and an lt k1100 not long ago ...and mentions that there was a fair bit of difference between the two


but to me the intake cam on the k1100 needs some serious reworking  ...possibly just advance it 15 degrees or so ..but needs  defiantly a longer duration by about 20 degrees ?


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
1987 k100rs ########   "Red"  - (red sports rs TWB style )
1989 K100rt #009637   "Black Betty"  (naked rt ala Nigel , now sporting an rs main fairing )
    

5Back to top Go down   Camshafts for 16 valve engines Empty Re: Camshafts for 16 valve engines Fri Aug 26, 2016 10:32 pm

Rick G

Rick G
admin
admin
That's the one I couldn't find and it is accurate Ingepedia told me that the better cams are available in EU


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1999 K1100 LT with a Big Block 1200
    

6Back to top Go down   Camshafts for 16 valve engines Empty Re: Camshafts for 16 valve engines Wed Aug 31, 2016 6:56 pm

Brad-Man

Brad-Man
Life time member
Life time member


__________________________________________________
Toys don't make the man - Man makes the toys....
Camshafts for 16 valve engines Usa-lo10
    

7Back to top Go down   Camshafts for 16 valve engines Empty K1100 cams Thu Sep 01, 2016 4:31 pm

Motorbike Mike

Motorbike Mike
Life time member
Life time member
It's true that the K1100 cams don't make much power but DO make for a nice flat torque curve that I would expect suite a side car very well.
I have an 1100 engine with 1200RS cams in my Cobas replica and don't think they're for you. My K1100LT has the flattest torque/power curve ever, this would be ideal for you. I have a 38,000 mile set available if you're interested.

Mike.

    

8Back to top Go down   Camshafts for 16 valve engines Empty Re: Camshafts for 16 valve engines Thu Sep 01, 2016 5:16 pm

AL-58

AL-58
Life time member
Life time member
Motorbike Mike wrote:It's true that the K1100 cams don't make much power but DO make for a nice flat torque curve that I would expect suite a side car very well.
I have an 1100 engine with 1200RS cams in my Cobas replica and don't think they're for you. My K1100LT has the flattest torque/power curve ever, this would be ideal for you. I have a 38,000 mile set available if you're interested.

Mike.

Do you have any idea whether the UK cams are the same as UK.  The Aussie cams are apparently 256 degree duration where the euros are 284 degrees.  Definitely interested.

Al


__________________________________________________
'08 F650GS (798cc)
'19 R1250RS

+ another boxer engined motorcycle and sidecar

"When I'm too old and too foolish to handle a sidecar I'll buy a Sportsbike"

Camshafts for 16 valve engines K-dogs10
    

9Back to top Go down   Camshafts for 16 valve engines Empty Re: Camshafts for 16 valve engines Fri Sep 02, 2016 3:15 am

Motorbike Mike

Motorbike Mike
Life time member
Life time member
Hi Al,
I think they're 284's but I'll check it out on REAL OEM and get back to you. 
M.

    

10Back to top Go down   Camshafts for 16 valve engines Empty Re: Camshafts for 16 valve engines Fri Sep 02, 2016 10:51 am

AL-58

AL-58
Life time member
Life time member
Every variation of K1100 camshaft I've looked at in Real OEM so far is 256, no different to what I've got.

AL


__________________________________________________
'08 F650GS (798cc)
'19 R1250RS

+ another boxer engined motorcycle and sidecar

"When I'm too old and too foolish to handle a sidecar I'll buy a Sportsbike"

Camshafts for 16 valve engines K-dogs10
    

11Back to top Go down   Camshafts for 16 valve engines Empty Re: Camshafts for 16 valve engines Fri Sep 02, 2016 11:20 am

Motorbike Mike

Motorbike Mike
Life time member
Life time member
You're right Al. 
Mine also has the 256's and they're the same as the pair I have spare. That's what the 1100's have and seem fine to me. For pulling a chair I think you'll be fine.

    

12Back to top Go down   Camshafts for 16 valve engines Empty Re: Camshafts for 16 valve engines Tue Feb 18, 2020 3:18 pm

Two Wheels Better

Two Wheels Better
Moderator
Moderator
Resurrecting an older post, and as a useful bit of reference. What the particular camshafts will do for you in theory and in practice is another matter.

In fiddling round with K1200RS camshafts, from a spare but damaged motor, for use in a low-mileage K1100RS engine, I've come upon all of the part numbers, catalogue fitment and their variations of 'degree'. The part numbers are what is currently listed and will not account for what BMW may have done back during the years of production of the particular model.

K1/K100-16V RS
Intake 11 31 1 461 691 (284) all markets except Australia & US (to include Canada?)
Intake 11 31 1 464 079 (256) Australia & US (to include Canada?)

Exhaust 11 31 1 461 693 (284) all markets except Australia & US (to include Canada?)
Exhaust 11 31 1 464 473 (264) with catalyser, limited fitment, markets not designated
Exhaust 11 31 1 464 080 (256) Australia & US (to include Canada?)

K1100RS/LT
Intake 11 31 1 464 510 (256) All markets & models, RS & LT, all years
Exhaust 11 31 1 464 512 (256/106) All markets & models, RS & LT, all years

K1200RS/GT/LT
Intake 11 31 1 465 164 (244) K1200LT 100HP all markets
Intake 11 31 7 672 566 (degree not listed) K1200LT 108HP all markets, production of approximately 2/2003 on

Intake 11 31 461 691 K1200RS/GT (284) all markets & years

Exhaust 11 31 1 465 167 (232) K1200LT 100HP all markets
Exhaust 11 31 7 672 568 (degree not listed) K1200LT 108 HP all markets, production of approximately 2/2003 on

Exhaust 11 31 1 461 693 K1200RS/GT (284) all markets & years

Sharp-eyed readers will likely note that the K1200RS/GT variants used the same cams as the early 16V engines of the K1 & K100RS-16V in non-Aussie/US markets. BMW have never really listed Canada as a separate market from the US since it often falls under BMWNA so take these numbers with a pinch of salt as it applies to the Great White North.


__________________________________________________
1977 R75/7-100, '93 K11/K12 Big Block, '95 R100 Mystic, '96 K1100RS, '98 K1200RS, '06 K1200R & '09 K1300GT. Projects: 1993 & '96 K1100RS, & 1st '98 K1200RS.
The Mystic, Big Block, 2nd K1200RS, K12R & K13 are running & ridable.
    

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