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Custom Vehicle Discussions => Screamin’ Eagle® Softail® Springer® => Topic started by: yoderjl on March 21, 2008, 11:56:03 AM
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I have noticed that about 3500 rpm's and up my bike seems to vibrate more than my buddies 07 night train with the 96 ci motor. Does anybody else with a 07 or 08 springer think this too? I would think that with the balanced engine it would'nt but maybe it is because of the extra ci's. Still runs good though.
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Does the night train have the B motor? My buddy has the 96 Ultra which doesn't have the balanced motor and it vibrates more at idle but is ok at cruise.In general,Harley's vibrate
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That is ...or was exactly the same feeling I got when I rode my CVO springer with a totally chocked engine with the standard pipes, filter and ECM. It was after I released all its potential with the ThunderMax w Autotune, having changed the pipes and filter, that I not only got better torque and power figures below 4 K, but what is better, over 4 K it pulls and pulls in a seemingless power surge that either has made thanks to the TMax a better balanced engine or the thrust feel makes you forget the vibration.... :orange: :orange: whatever it is, it makes all the difference in the World.
I also have a Dyna FXDC 07, and that bike is much smoother thanks to the rubber mounts, and before doing the mod on the CVO I was convinced it was faster and pulled away stronger. Now I can assure you that the Dyna might be doing fine, but now the power of the bigger CVO is obviously present and unleashed. :2vrolijk_21:
Don't wait any longer and do the apropriate mods to your Springer....
Spanish Flyer
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I have noticed that about 3500 rpm's and up my bike seems to vibrate more than my buddies 07 night train with the 96 ci motor. Does anybody else with a 07 or 08 springer think this too? I would think that with the balanced engine it would'nt but maybe it is because of the extra ci's. Still runs good though.
I noticed mine was vidy above 3k at first, changed the pipes to a VH BR 2 into 1 and put the new Super Race tuner in richined it up a little and it feels better. But you may want to take a quick look at your motor mount bolts to see if there is any powder residue around them, front bottom long bolt and the top motor mount under the fuel tank and on both cylinder heads. I wouldnt put a wrench on them, unless you have a service manual with correct torque specs. Would be best to take it to a dealer and have them check it.
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I have noticed that about 3500 rpm's and up my bike seems to vibrate more than my buddies 07 night train with the 96 ci motor. Does anybody else with a 07 or 08 springer think this too? I would think that with the balanced engine it would'nt but maybe it is because of the extra ci's. Still runs good though.
A 45 degree V twin is going to shake and vibrate, even with a balance shaft. Just as with the rubber mount engines, there will be certain engine speeds where the balancers or rubber mounts are more effective, and speeds where they are less effective. The trick is to design the balancers or the mounts for maximum damping at the most common riding speeds.
Assuming you aren't talking about the normal amount of vibration, there are several possibilities that could make one worse than another. A common problem is uneven combustion pressures between the two cylinders, caused by the "close enough for government work" map from the factory. A really good tune that maps each cylinder separately will go a long way toward making the bike smoother. Another factor is the exhaust system. Check for proper clearances, no binding, all clamps and mounting bolts properly tightened, etc. A good idea would be to loosen everything and then retighten, starting at the heads and moving toward the rear. Be aware that some aftermarket systems can worsen the vibration, while some seem to improve it.
If your vibration starts getting worse, have your crankshaft checked for runout. I don't want to cause you undue stress or alarm, but some have in fact had severe vibrations from crank runout.
Jerry
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Yep, Harleys vibrate. That's what they do! There's vibration, and then there's annoying or problem vibrations when something's wrong. If something's wrong, find it and fix it. If nothing's wrong, a little vibration is part of the ride. Rubbermounts look like they're vibrating a lot at idle, more so than a B motor which is solid mounted. But at speed the rubbermounts absorb that vibration so much better than a counterbalanced HD V-twin. But if you want no vibration on a motorcycle (I don't know why anyone would) get a Jap bike with a crankshaft. ;)
Hoist! 8)
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A 45 degree V twin is going to shake and vibrate, even with a balance shaft. Just as with the rubber mount engines, there will be certain engine speeds where the balancers or rubber mounts are more effective, and speeds where they are less effective. The trick is to design the balancers or the mounts for maximum damping at the most common riding speeds.
Assuming you aren't talking about the normal amount of vibration, there are several possibilities that could make one worse than another. A common problem is uneven combustion pressures between the two cylinders, caused by the "close enough for government work" map from the factory. A really good tune that maps each cylinder separately will go a long way toward making the bike smoother. Another factor is the exhaust system. Check for proper clearances, no binding, all clamps and mounting bolts properly tightened, etc. A good idea would be to loosen everything and then re tighten, starting at the heads and moving toward the rear. Be aware that some aftermarket systems can worsen the vibration, while some seem to improve it.
If your vibration starts getting worse, have your crankshaft checked for runout. I don't want to cause you undue stress or alarm, but some have in fact had severe vibrations from crank runout.Jerry
I had such a case. The engine was replaced because of a "way out" crank runout. :(
Talk to Hoist about what is needed to replace the crank shaft, if you want to use your "dollar" on the motor. 8)
There are many ways to "power balance" a V Twin so that it will run smooth. But you will have to become meticulous about it.
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well i have already got exhaust and a powercommander on it already. the vibration is not real bad but it is worse than the 96b engine on his night train. I will have the dealer check it at my first service. And i am getting it tuned at the same time. It is probably ok.
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Hey how did you go with you vibration problems? My 2007 springer softail cvo has the exact same problem
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And my 2008 FXSTSSE2 CVO Springer in Perth WA
I've just gotten used to the vibes I think , had it 18months+ now. Blurry mirrors at 110 Km/H
I have tried several different tunes in the ECM , SERT and TTS , and the TTS cals make it run smoother for sure
My 2013 CVO Breakout is noticeably "smoother" all thru' the revs , but is way less " grunty "