engine vibration - SV650.org

20-01-06, 11:25 PM

is engine vibration begining at say 5000 rpm's normal, esspecially in the lower gears?

northwind · 21-01-06, 01:09 AM

Well, they all vibrate a bit. The question is, how much?

21-01-06, 01:12 AM

Mine starts to vibrate when I switch it on. Engines tend to.

21-01-06, 12:24 PM

lets just say it accelerates smoothly until i hit 5000 rpm's in first gear and then i start to get some engine vibration , in other words it "feels" like the engine is straining ..is this typical V-twin AV behavior? it does it also in second gear and so on just in the higher RPM's

21-01-06, 12:30 PM

Quote:

Originally Posted by ryrides

lets just say it accelerates smoothly until i hit 5000 rpm's in first gear and then i start to get some engine vibration , in other words it "feels" like the engine is straining ..is this typical V-twin AV behavior? it does it also in second gear and so on just in the higher RPM's

Is this happening to you on small throttle openings? Open the throttle a bit further and hang on to the bars...
Mine ('99 S) does just that... on cracked throttle starts to "struggle" at 5k, open throttle, ops, we're at 10k, time to change up a gear..........

ophic · 21-01-06, 12:37 PM

whereabouts are you ryrides? this 5krpm engine problem is obviously seriously bothering you. I would suggest you attempt to find another "known good" SV to ride to compare with yours, or ask another SV rider to take yours for a quick spin. Then any engine problems would quickly become apparent.

Alternatively, get a dealer to look at it. More expensive and probably less reliable though.

northwind · 21-01-06, 01:08 PM

Where are you starting your acceleration from? A standard SV doesn't pull well at all below 3000rpm or thereabouts, and can lead to really bad juddering... And you don't want that, apparently it damages the bottom end.

The SV's working power band is from about 5000 to 9000 rpm, that's where it makes effective power. Anything less, and you might as well be on a 250. It certainly shouldn't be labouring at 5000, in fact it should be getting ready to take off.

What's needed is more facts. Ride it a few times right from the lowest revs it'll ride smoothly at, then accelerate at various speeds right up to 9 or 10000rpm, see what happens each time.

Also, do you have an end can or air filter fitted? That could be leaning you out at about those points, causing a loss of power- if this is the case it'll go away at higher revs.

21-01-06, 06:42 PM

ill try opening the throttle more and see if that helps..actually it does seem to do it more at times than others maybe i havent been paying attentionto the throttle enough...as it is..i have a good dealer that i can take it too the next town over..but thanks for all the advice folks...good riding...Ryrides

21-01-06, 07:29 PM

There's a harmonic frequency on mine (low mid-range, but can't tell you exactly where, RPM-wise), where for perhaps 500 rpm or so, under load, the vibes suddenly increase, then go again. Part of the character, innit?

22-01-06, 07:45 PM

At 5k revs the motor of the SV is just coming on song when things get really interesting. How long have you been riding? It is indeed a very odd question if you dont mind me saying?! If you dont want a touch of vibes/character then you chose the wrong bike my friend!

Jeez if you got to 5k revs on my bike you would definitely sh*t your pants!

20-01-06, 11:25 PM	#1
ryrides Guest Posts: n/a	engine vibration is engine vibration begining at say 5000 rpm's normal, esspecially in the lower gears?

21-01-06, 01:09 AM	#2
northwind Moderator Mega Poster Join Date: Jan 2004 Location: In the garage where I belong Posts: 17,083	Well, they all vibrate a bit. The question is, how much? __________________ "We are the angry mob, we read the papers every day We like what we like, we hate what we hate But we're oh so easily swayed"

21-01-06, 12:37 PM	#6
ophic Member Mega Poster Join Date: Jan 2004 Location: Whyteleafe Posts: 3,395	whereabouts are you ryrides? this 5krpm engine problem is obviously seriously bothering you. I would suggest you attempt to find another "known good" SV to ride to compare with yours, or ask another SV rider to take yours for a quick spin. Then any engine problems would quickly become apparent. Alternatively, get a dealer to look at it. More expensive and probably less reliable though. __________________ Silver SV650SK3, Fuel exhaust

21-01-06, 01:08 PM	#7
northwind Moderator Mega Poster Join Date: Jan 2004 Location: In the garage where I belong Posts: 17,083	Where are you starting your acceleration from? A standard SV doesn't pull well at all below 3000rpm or thereabouts, and can lead to really bad juddering... And you don't want that, apparently it damages the bottom end. The SV's working power band is from about 5000 to 9000 rpm, that's where it makes effective power. Anything less, and you might as well be on a 250. It certainly shouldn't be labouring at 5000, in fact it should be getting ready to take off. What's needed is more facts. Ride it a few times right from the lowest revs it'll ride smoothly at, then accelerate at various speeds right up to 9 or 10000rpm, see what happens each time. Also, do you have an end can or air filter fitted? That could be leaning you out at about those points, causing a loss of power- if this is the case it'll go away at higher revs. __________________ "We are the angry mob, we read the papers every day We like what we like, we hate what we hate But we're oh so easily swayed"

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21-01-06, 01:12 AM	#3
Carsick Guest Posts: n/a	Mine starts to vibrate when I switch it on. Engines tend to.

21-01-06, 12:24 PM	#4
ryrides Guest Posts: n/a	lets just say it accelerates smoothly until i hit 5000 rpm's in first gear and then i start to get some engine vibration , in other words it "feels" like the engine is straining ..is this typical V-twin AV behavior? it does it also in second gear and so on just in the higher RPM's

21-01-06, 06:42 PM	#8
ryrides Guest Posts: n/a	ill try opening the throttle more and see if that helps..actually it does seem to do it more at times than others maybe i havent been paying attentionto the throttle enough...as it is..i have a good dealer that i can take it too the next town over..but thanks for all the advice folks...good riding...Ryrides

21-01-06, 07:29 PM	#9
chazzyb Guest Posts: n/a	There's a harmonic frequency on mine (low mid-range, but can't tell you exactly where, RPM-wise), where for perhaps 500 rpm or so, under load, the vibes suddenly increase, then go again. Part of the character, innit?

22-01-06, 07:45 PM	#10
Peter Henry Guest Posts: n/a	At 5k revs the motor of the SV is just coming on song when things get really interesting. How long have you been riding? It is indeed a very odd question if you dont mind me saying?! If you dont want a touch of vibes/character then you chose the wrong bike my friend! Jeez if you got to 5k revs on my bike you would definitely sh*t your pants!