K100RS Altitude Compensator - K-Bikes.com - Excellence in Motion
 
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post #1 of 3 (permalink) Old Aug 11th, 2010, 4:57 pm Thread Starter
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K100RS Altitude Compensator

I need some info for a 1985 K100RS altitude compensator. This bike is being moved from Michigan, 500 ft above sea level to the mountains west of Denver, 9500 ft above sea level. Is it necessary to make any adjustment?
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post #2 of 3 (permalink) Old Aug 13th, 2010, 8:17 pm
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Quote:
Originally Posted by waynepquinn
I need some info for a 1985 K100RS altitude compensator. This bike is being moved from Michigan, 500 ft above sea level to the mountains west of Denver, 9500 ft above sea level. Is it necessary to make any adjustment?
The altitude compensator is still dealer available. Should be easy to get in CO. I had one on on my '85 K100RT.
They are simply a loop of wire with a plug matching to the one on the bike. I cut the wire loop and installed a switch in the circuit, So it was easy to drop it out at lower elevations.

The compensator is supposed to make the bike run leaner at idle. Don't really know if it worked or not. I was running it up to 6K feet and I didn't notice any difference in the bikes operation. But, your elevation of 9.5K+ is a whole new ball game!!

Bruce C
'04 K1200RS Capri Blue(totaled)
2008 Triumph Sprint ST
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post #3 of 3 (permalink) Old Aug 14th, 2010, 7:37 am
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If I recall well and as Brucecha mentioned ,the compensator is only a loop in the circuit so it would be easy enough to fabricate your own if needed. It took me years in the 80s before I even bought one for my K100RS and had never noticed any loss of performance or such in them high Colorado passes.

But that was well before they started adding corn juice to your gasoline.....

However I just rode my K1200RS through Colorado last month,Yes west of Denver, and experienced a bit of surging and slightly erratical idle I can only attribute to the gasoline sold there which is compensated (adjusted) for operation at higher altitudes.

So it is probably a good idea to use that altitude compensator on your bike, above 4,500 feet I think was BMW`s recommendation at the time.

But.....be careful up there.......I could have used snow tires from all the fresh hail that had covered the road and was starting to melt.

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