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Flying Duck
PsyKotic Waterfowl
Joined: 27 Jan 2005
Posts: 10102
Location: Bumf***, WA
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 Posted: Sun Mar 02, 2014 8:37 pm Post subject: My K75 surges at 6,000 RPM |
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I wonder if this could be the cause...
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93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
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carp
Flying Brick Rider
Joined: 09 Jan 2009
Posts: 159
Location: Minnesota
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| Posted: Sun Mar 02, 2014 10:57 pm Post subject: |
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At what rpm does it stop surging?
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93 K1100LT
07 Bandit 1250S |
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drikko
Flying Brick Rider
Joined: 20 Nov 2009
Posts: 1966
Location: Brisbane, OZ
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| Posted: Mon Mar 03, 2014 1:55 am Post subject: |
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How about I try it on mine to confirm if that's the problem? Will it fit a K11RS?
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K1100RS '97
Laverda RGS 1000 '84
Jim Young Trailer Sailer 5.7M WB
DISCLAIMER:- Anything I say may have been when I was drunk so please don't take it personally.
'Bigamy is having one wife/husband too many. Monogamy is the same.'
Oscar Wilde |
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Motodeux
Joined: 18 Feb 2011
Posts: 18
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| Posted: Mon Mar 03, 2014 5:04 am Post subject: |
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Seems to be a common problem!
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Flying Duck
PsyKotic Waterfowl
Joined: 27 Jan 2005
Posts: 10102
Location: Bumf***, WA
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| Posted: Mon Mar 03, 2014 11:22 pm Post subject: |
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| carp wrote: | | At what rpm does it stop surging? |
I don't know. Too rainy around here these days to do much serious riding. I've only had it up to about 8K so far. And I want to keep my license.
The stock rev limiter on a K75 is about 8,750. Back in the day, Luftmeister altered ICU's to get rid of that. Don't know if this bike has that or not. (Yet.) 
_________________
93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE |
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Flying Duck
PsyKotic Waterfowl
Joined: 27 Jan 2005
Posts: 10102
Location: Bumf***, WA
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| Posted: Mon Mar 03, 2014 11:26 pm Post subject: |
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| drikko wrote: | | How about I try it on mine to confirm if that's the problem? Will it fit a K11RS? |
Luftmeister turbo'd some K1s. Pretty sure a K1 turbo would bolt up to a K1100. All you'd need to do is mount the K11's O2 sensor in the exhaust.
I know of a turbo K1 that'll be up for sale soon in California.
_________________
93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE |
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Flying Duck
PsyKotic Waterfowl
Joined: 27 Jan 2005
Posts: 10102
Location: Bumf***, WA
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| Posted: Mon Mar 03, 2014 11:29 pm Post subject: |
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Is that yellow K100 a turbo?
Does it have an intercooler?
Interesting that they got rid of the relay box.
_________________
93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE
Last edited by Flying Duck on Tue Mar 04, 2014 12:12 am; edited 1 time in total |
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BobZ(IL)
Rider in the Sky
Joined: 20 May 2007
Posts: 651
Location: Bourbonnais, IL
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| Posted: Mon Mar 03, 2014 11:35 pm Post subject: |
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It's not so much how far you wind it with a turbo, but how quickly you get there. 
_________________
'93 K1100LT
'78 R100S
'05 R1200GS
BMWMOA, CRBMWOA, ABC, K11OG #997
Live well, do good work, enjoy the ride. |
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Flying Duck
PsyKotic Waterfowl
Joined: 27 Jan 2005
Posts: 10102
Location: Bumf***, WA
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| Posted: Tue Mar 04, 2014 12:28 am Post subject: |
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You know, I bought this mostly because I figured it would be the only opportunity I'd ever get to ride, much less own, a turbo K. However, what I've subsequently discovered is that a much more useful mod, since the turbo doesn't kick in until higher RPMs, is that the Lufty high performance cams. Having a smooth K75 that actually goes somewhere when you twist the throttle at 3,000 RPM is a wet dream for me.
_________________
93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
Buy parts HERE |
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Motodeux
Joined: 18 Feb 2011
Posts: 18
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| Posted: Tue Mar 04, 2014 4:28 am Post subject: |
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| Flying Duck wrote: | Is that yellow K100 a turbo?
Does it have an intercooler?
Interesting that they got rid of the relay box. |
The turbo is on top of the engine, along with the SU carburettor, no intercooler, (not possible with draw-through).
Electrics: one-off ignition box, starter relay and early twins indicator relay.
With the carburettor, it uses just a fuel tap, so no fuel pump, etc.
Absolutely basic, very discreet but it works very well! |
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