K2 Crazy Vibrations all of a sudden - SV650.org

russell664 · 27-10-16, 11:23 PM

Hi All,

I am a little stumped.

I know a month or so ago, I could be a 10k rpm and there wouldn't be vibrations which stopped me focusing. However, today, on the same road whenever 10k rpm was hit the pegs, seat and bars where vibrating crazy - so much so it felt quite tingly.

Any idea what it could be?
She is due an oil change, and filter change along with new plugs and the air filter sorted. Could the old oil be causing this? It just seems odd how it started so randomly!

maviczap · 28-10-16, 05:06 AM

Does this vibration happen with the bike stationary?

Engine bolts all tight.?

Does any of the wheels have any balance weights, and are they all still in place?

Blapper · 28-10-16, 06:29 PM

How is the rear chain? I'd start there, but while I'm writing, if the engine is due an oil change, I'd keep the revs a tad lower anyway.

russell664 · 29-10-16, 09:17 AM

Quote:

Originally Posted by maviczap

Does this vibration happen with the bike stationary?

Engine bolts all tight.?

Does any of the wheels have any balance weights, and are they all still in place?

I have not tried doing it when stationary yet, I'll give it a go later. I am trying to find my torque wrench I so I can give the engine bolts a tighten (if at all!) I will let you guys know the outcome.

russell664 · 29-10-16, 11:39 PM

Okay so I'm going to give this a bash tomorrow. May seem daft, but which engine bolts do I need to tighten, all of them?
Am I correct in thinking the torque specifications should be 55nm?

Sir Trev · 30-10-16, 07:39 AM

Have you considered changing up sooner? Fairly sure peak torque on an SV is well bellow 10k so revving it so high is more noise than go.

russell664 · 30-10-16, 10:04 AM

The vibrations at 8,k are still really bad as well.

Red ones · 30-10-16, 10:19 AM

Any particular gear or road speed or just at high engine speed?

Sent from my iPhone using Tapatalk

russell664 · 30-10-16, 04:36 PM

Okay so I had a look.

At 8k the vibration is quite considrable, can you feel quite a lot this engine speed? I have torqued up the engine bolts as well.

The vibrations are there both when still and moving. The vibrations are there in Neutral. Less vibrations at higher rpm in lower gears too.

Odd, any suggestions?

maviczap · 30-10-16, 04:48 PM

How many miles on the clock, as I'm wondering if the crank or big ends are about to go, if the engines been abused sometime is its past. Worst case scenario, but it is a weak spot if the bikes been wheelied a lot.

I can't think of anything other than maybe if the carbs are out of sync.

Some engines are just vibey, depends how they've been treated

27-10-16, 11:23 PM	#1
russell664 Member Join Date: Apr 2016 Posts: 127	K2 Crazy Vibrations all of a sudden Hi All, I am a little stumped. I know a month or so ago, I could be a 10k rpm and there wouldn't be vibrations which stopped me focusing. However, today, on the same road whenever 10k rpm was hit the pegs, seat and bars where vibrating crazy - so much so it felt quite tingly. Any idea what it could be? She is due an oil change, and filter change along with new plugs and the air filter sorted. Could the old oil be causing this? It just seems odd how it started so randomly!

28-10-16, 05:06 AM	#2
maviczap Member Mega Poster Join Date: Mar 2007 Posts: 9,097	Re: K2 Crazy Vibrations all of a sudden Does this vibration happen with the bike stationary? Engine bolts all tight.? Does any of the wheels have any balance weights, and are they all still in place? __________________ We're riding out tonight to case the promised land Make everyday count RIP Reeder - Jolly Green Giant and comedy genius

28-10-16, 06:29 PM	#3
Blapper Member Join Date: Jun 2016 Location: Rochester,Kent. Posts: 824	Re: K2 Crazy Vibrations all of a sudden How is the rear chain? I'd start there, but while I'm writing, if the engine is due an oil change, I'd keep the revs a tad lower anyway.

29-10-16, 11:39 PM	#5
russell664 Member Join Date: Apr 2016 Posts: 127	Re: K2 Crazy Vibrations all of a sudden Okay so I'm going to give this a bash tomorrow. May seem daft, but which engine bolts do I need to tighten, all of them? Am I correct in thinking the torque specifications should be 55nm?

30-10-16, 07:39 AM	#6
Sir Trev Member Mega Poster Join Date: Jun 2005 Location: High Wycombe, where the chair factories used to be Posts: 1,479	Re: K2 Crazy Vibrations all of a sudden Have you considered changing up sooner? Fairly sure peak torque on an SV is well bellow 10k so revving it so high is more noise than go. __________________ We are the Goon Squad and we're coming to town, BEEP BEEP!

30-10-16, 10:04 AM	#7
russell664 Member Join Date: Apr 2016 Posts: 127	Re: K2 Crazy Vibrations all of a sudden The vibrations at 8,k are still really bad as well.

30-10-16, 10:19 AM	#8
Red ones Member Mega Poster Join Date: Jul 2003 Location: Hertfordshire Posts: 1,422	Re: K2 Crazy Vibrations all of a sudden Any particular gear or road speed or just at high engine speed? Sent from my iPhone using Tapatalk

30-10-16, 04:36 PM	#9
russell664 Member Join Date: Apr 2016 Posts: 127	Re: K2 Crazy Vibrations all of a sudden Okay so I had a look. At 8k the vibration is quite considrable, can you feel quite a lot this engine speed? I have torqued up the engine bolts as well. The vibrations are there both when still and moving. The vibrations are there in Neutral. Less vibrations at higher rpm in lower gears too. Odd, any suggestions?

30-10-16, 04:48 PM	#10
maviczap Member Mega Poster Join Date: Mar 2007 Posts: 9,097	Re: K2 Crazy Vibrations all of a sudden How many miles on the clock, as I'm wondering if the crank or big ends are about to go, if the engines been abused sometime is its past. Worst case scenario, but it is a weak spot if the bikes been wheelied a lot. I can't think of anything other than maybe if the carbs are out of sync. Some engines are just vibey, depends how they've been treated __________________ We're riding out tonight to case the promised land Make everyday count RIP Reeder - Jolly Green Giant and comedy genius

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