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Author Topic: [SOLVED] '86 K100 won't go faster than 60 mph  (Read 23927 times)

Offline Martin

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Re: '86 K100 won't go faster than 60 mph
« Reply #25 on: September 11, 2016, 05:23:58 PM »
You definitely don't have full throttle, I measured 45mm between the end of the idle screw and the stop. My screw at full throttle is level with the top band clamp on the throttle body. Do you have another bike that you can compare it to? It is possible that it has been assembled incorrectly I can't tell from the pictures. Is there a foreign body jammed in there .Possibly another member on this site might have a set of throttle bodies that they can photograph for you to compare.
Regards Martin.
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  • North Lakes Queensland Australia
  • 1992 K75s Hybrid, Lefaux, Vespa V twin.

Offline Martin

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Re: '86 K100 won't go faster than 60 mph
« Reply #26 on: September 11, 2016, 05:43:56 PM »
Hope this helps. Type in BMW K100 throttle body images on the net lots of pictures.
Regards Martin.
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  • North Lakes Queensland Australia
  • 1992 K75s Hybrid, Lefaux, Vespa V twin.

Offline kennybobby

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  • Last of the True Southern Sweet Mullets and Squids
Re: '86 K100 won't go faster than 60 mph
« Reply #27 on: September 11, 2016, 06:10:53 PM »
It appears that Somebody took your throttle bodies apart and mounted the bellcrank (circled in red below) for the cable 90 degrees off.  i've not ever taken these apart but that's what it looks like to me.  As a result the back edge of the bellcrank is hitting the back rail and you can't open any further by cable or by hand.
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Ridin' 87 K75S vin 1334,
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Offline Inge K.

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Re: '86 K100 won't go faster than 60 mph
« Reply #28 on: September 12, 2016, 04:54:26 AM »
Quote from: kennybobby on September 11, 2016, 06:10:53 PM
It appears that Somebody took your throttle bodies apart and mounted the bellcrank (circled in red below) for the cable 90 degrees off.

It's correct mounted, if not the stop screw would also be out of position......it isn't.
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Offline kennybobby

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Re: '86 K100 won't go faster than 60 mph
« Reply #29 on: September 12, 2016, 11:17:44 AM »
Remove the TPS completely and retry.
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Ridin' 87 K75S vin 1334,
Renchin' 86 75S vin 0061

Offline Inge K.

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Re: '86 K100 won't go faster than 60 mph
« Reply #30 on: September 12, 2016, 11:24:28 AM »
Quote from: kennybobby on September 12, 2016, 11:17:44 AM
Remove the TPS completely and retry.

That was allready mentioned back in reply #16...........didn't make any difference he said.
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Offline Laitch

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Re: '86 K100 won't go faster than 60 mph
« Reply #31 on: September 12, 2016, 12:36:53 PM »
Quote from: Steenbeen on August 14, 2016, 08:31:47 AM
Yeah, I just checked the TPS. Didn't seem to make a difference. However, I just found out I need a new throttle first... The teeth on the throttle bar are flattened, and it would 'skip' through the teeth when force was applied. The damage was hidden under a lot of grease.
You haven't told us what was done about this condition?
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  • Along the Ridley in Vermont.
  • 1995 K75 89,000 miles

Offline Steenbeen

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Re: '86 K100 won't go faster than 60 mph
« Reply #32 on: September 16, 2016, 12:13:48 PM »
Marked solved!

First, thanks a lot for the responses and the time that went in them.
Sometimes the vaguest problems have the easiest solutions. The most right bottom hose clamp was turned in such a way it blocked the butterfly. The manual says that the middle two bottom clamps should be turned about 35 degrees to avoid blocking the butterfly. I guess the previous owner misread and turned all clamps 35 degrees. I couldn't see it until I was ready to disassemble the butterfly. It cost me some time to find out, but I hope someone else can avoid this by reading this topic.

The culprit:
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  • Nederland
  • K-100

Offline Martin

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Re: [SOLVED] '86 K100 won't go faster than 60 mph
« Reply #33 on: September 16, 2016, 04:48:46 PM »
 :2thumbup: :clap: Observation patience and persistence.
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  • North Lakes Queensland Australia
  • 1992 K75s Hybrid, Lefaux, Vespa V twin.

Offline Filmcamera

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Re: [SOLVED] '86 K100 won't go faster than 60 mph
« Reply #34 on: September 16, 2016, 04:56:55 PM »
Good job! Way to persevere now what'll she do? 120 mph, 130?? We need to know  :yes
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  • San Jose, Costa Rica
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Offline Laitch

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Re: [SOLVED] '86 K100 won't go faster than 60 mph
« Reply #35 on: September 16, 2016, 07:28:46 PM »
Thanks for the followup, Steenbeen!
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  • Along the Ridley in Vermont.
  • 1995 K75 89,000 miles

Offline K1300S

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Re: [SOLVED] '86 K100 won't go faster than 60 mph
« Reply #36 on: September 16, 2016, 08:24:02 PM »
yeah!
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Project Thread "K75s Midlife Refresh"
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Offline Steenbeen

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Re: [SOLVED] '86 K100 won't go faster than 60 mph
« Reply #37 on: September 17, 2016, 02:42:46 PM »
@filmcamera

I don't know yet, guess I'll have to go to the autobahn to test it out!

I had my first drive just now, and my oh my what an absolute monster (the first 1000cc bike I've driven). Really happy with the bike now!
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  • Nederland
  • K-100
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