I know that the 650 has a reputation for vibrating a lot, but I'm not really sure what counts as a lot since my beater '80 special is the only motorcycle I have ever owned (so far lol). The vibrations at higher rpms seem really severe. I notice it when I am accelerating in town, and when I am riding around at normal country road speeds, but it really becomes a problem when I am on a state highway and trying to hold anything above 50-55 in 5th gear, because it's incredibly fatiguing. I get the worst of it through my seat, but the bars and mirror vibrate a lot too. It's tolerable for short periods at 60, but it's absolutely vicious at 70 and beyond. I rode to the next town over today and half way there the tail light went out which I presume was a solder joint fatiguing because that has happened in the past.
My carbs are not jetted quite right but they are (at least visually) synced with one another. (I adjusted until the slide position was exactly the same between both of my aftermarket flat slides) I did the valves recently and those are fine. Motor mounts are clamped down pretty tight. I never checked the cam chain tension but I will. Timing is set in stone as far as I am aware since the bike doesn't use points.
I've heard some people say that the vibrations aren't so bad on the '650, and other people say that all the bikes vibrate like crazy. It feels wrong to me though. The only comparable experience vibration wise that I have had is when my harbor freight powered minibike with a frame that has no bar across the top of the engine hits 5000 rpm with it's incredibly wobbly misshapen clutch and an unbalanced single that was designed to rev to only 3600. I would expect a production vehicle to be several orders of magnitude better so I'm pretty confident I have a problem somewhere.
My carbs are not jetted quite right but they are (at least visually) synced with one another. (I adjusted until the slide position was exactly the same between both of my aftermarket flat slides) I did the valves recently and those are fine. Motor mounts are clamped down pretty tight. I never checked the cam chain tension but I will. Timing is set in stone as far as I am aware since the bike doesn't use points.
I've heard some people say that the vibrations aren't so bad on the '650, and other people say that all the bikes vibrate like crazy. It feels wrong to me though. The only comparable experience vibration wise that I have had is when my harbor freight powered minibike with a frame that has no bar across the top of the engine hits 5000 rpm with it's incredibly wobbly misshapen clutch and an unbalanced single that was designed to rev to only 3600. I would expect a production vehicle to be several orders of magnitude better so I'm pretty confident I have a problem somewhere.