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Two questions. Jerky at low speed and quickshift
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Mon Jun 15, 2020 3:33 pm
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Only had the bike for a week so I am not sure whether it is competely normal - but in low gears especially at low speeds, I notice the bike is quite jerky. Like a fueling thing or when you would have a chain that was on the way out or too loose. |
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The bike should not be jerky at low speeds (1500 rpm and very light throttle )..... |
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Zitat von spainy im Beitrag #1 2 days ago, you said, "Very strange comimng from an inline 4 to the boxer engine. At idle it almost feels like a bag of nails compared to the Suzy lol. I do like the quickshift tho, lazy gear changes here I come." If you have not spent much time on a big twin recently then it will take some time to recalibrate your brain. The RS is quite gentle compared to many other twins. On my R1150GS and Yamaha Super Tenere I was often slipping the clutch in tight corners which is not needed on the RS. Maybe you need to use a gear higher than your brain is telling you and use the low down torque more? |
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I think the jerky low speed running is due to very lean emission fueling requirements. I bought my RS in the spring of 2015 and it has excellent slow speed throttle response and pulling power. But I bet that bike was built to conform to Euro 3 regulations. It is possible that some Euro 4 models are running much leaner.
Current motorcycle collection: 2002 Yamaha FZ1; 2020 KTM 390 Duke; 2011 Royal Enfield Bullet 500; 2009 BMW F650GS; 2016 BMW R1200RS; 2018 Zero S 16.6 kWh
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Zitat von Vtbob im Beitrag #2 I checked the manual but it doesn´t say which gears to be used in. I have been using from second upwards but wanted to check. |
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Zitat von Richard230 im Beitrag #4 Mine is a 2015 but is definitely not silky smooth. On my last bike (inline 4) it had an identical jerkiness issue which drove me crazy for 6 months before I realised it was a pinched fuel line. Idential jerkiness...could this be the issue? |
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Zitat von spainy im Beitrag #6Zitat von Richard230 im Beitrag #4 Unlikely to be the fuel line. Some parameters can go out if sync on this bike. Throttle position sensor & throttle body balance are routine checks at a service. When was the last service done? Maybe, when the next one is due, ask for another boxer as a loan bike and then you will find out if this is a problem unique to your bike or a feature of all boxers that you are not used to. I suspect the latter as I have heard this so many time before when people have come from Japanese inline 4 cylinder bikes to a boxer or V twin. As to the quick shift. You are using it in the best way. Use clutch to go from 1-2 and then you can use the QS to go up & down. another feature of big twins is that the QS is a bit clunky, especially 1-2. Anyone that says it is not clunky needs to ride a S1000XR for comparison. I own a S1000XR as well as the RS and I enjoy the unique characteristics of both but it does lead to the occasional mistimed gear change. I'm sure the cyclists listening to me rev the nuts off the XR as I hit neutral instead of 2nd were mightily amused as I pulled away from a junction yesterday morning. I completely confused the ECU by trying to achieve a clutched and a QS change in a moment of indecision. |
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My opinion is that while you do not say if you are using a shift cam engine, you can not be describing that engine... |
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Zitat von M3M im Beitrag #8 Excuse my ignorance but how do I know if it´s a shift cam? |
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Zitat von wessie im Beitrag #7Zitat von spainy im Beitrag #6Zitat von Richard230 im Beitrag #4 The XR, the bike that I really wanted but couldn´t afford. |
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Zitat von spainy im Beitrag #10Zitat von M3M im Beitrag #8 It´s a 2015 if that helps? Is the shift cam the new engine that came out with the 1250? |
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Zitat von wessie im Beitrag #3Zitat von spainy im Beitrag #1 I agree with wessie. Most likely the bike is fine. I owned a long list of big inline fours before buying the RS, my first ever big twin. I remember thinking how abrupt the power felt on my early rides. After a few trips though I kind of “learned the engine” and it seemed much smoother though nothing on the bike had changed. I’d simply adapted my riding to a different type of engine. If there are no warnings or obvious running problems I’d suggest getting more seat time before making any changes. |
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Zitat von spainy im Beitrag #10Zitat von M3M im Beitrag #8 in another thread you say you have a 2015/6 R1200RS which is the same spec as mine. It's not a shift cam, that came with the 1250. |
