1 Is my throttle response normal? Tue Sep 06, 2016 12:50 pm
Bikesmith
Silver member
Hey gang!
Thanks to all your help, I have my 1985 K100 RS running incredibly well. It seems pretty much perfect at this point. There's just one thing I'm wondering about:
When I release the throttle, the transition from engine powering to engine braking seems abrupt and strong. If I let the throttle off as slowly as I can, engine power eases off just as I would expect right up until the end, when it suddenly jumps to very strong engine braking (enough to make the front end dive if I do it in 1st). Is this perhaps an actual problem, or just a case of me needing to get used to how this engine works?
The transition in the other direction (beginning to apply throttle) is also sharp, but I can manage it if I'm very careful with twisting the throttle.
Also, the bike idles a little high (1050-1100). My thinking is that that's not causing the problem. If anything, it seems like that might have been an attempt on the part of the previous owner to ease the power-to-braking transition. Am I wrong? Could that be causing an issue?
Overall, it's not really a big deal. I think mostly I'm noticing this because I'm used to a 76-year-old, softly tuned, 13HP 350cc engine. So the K100 engine feels REALLY strong to me. But now that I've fixed all the real problems, I'm free to obsess about things that probably aren't actually problems.
Thanks again for all your help!
-Jon
Thanks to all your help, I have my 1985 K100 RS running incredibly well. It seems pretty much perfect at this point. There's just one thing I'm wondering about:
When I release the throttle, the transition from engine powering to engine braking seems abrupt and strong. If I let the throttle off as slowly as I can, engine power eases off just as I would expect right up until the end, when it suddenly jumps to very strong engine braking (enough to make the front end dive if I do it in 1st). Is this perhaps an actual problem, or just a case of me needing to get used to how this engine works?
The transition in the other direction (beginning to apply throttle) is also sharp, but I can manage it if I'm very careful with twisting the throttle.
Also, the bike idles a little high (1050-1100). My thinking is that that's not causing the problem. If anything, it seems like that might have been an attempt on the part of the previous owner to ease the power-to-braking transition. Am I wrong? Could that be causing an issue?
Overall, it's not really a big deal. I think mostly I'm noticing this because I'm used to a 76-year-old, softly tuned, 13HP 350cc engine. So the K100 engine feels REALLY strong to me. But now that I've fixed all the real problems, I'm free to obsess about things that probably aren't actually problems.
Thanks again for all your help!
-Jon
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Jon
Mechanically competent, electrically perplexed
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1985 BMW K100RS
1959 BMW R60
1942 Chevrolet 3/4-ton Special
1940 Royal Enfield WD/CO
1975 Porsche 911S