I can't track this down and I"m starting to think it's just normal. I have an engine vibration that kicks in at a distinct RPM that vibrates the bike so much that my feet are going numb on the pegs. Soon as I pull clutch in it's gone. It's 100% engine related. I don't know what to check. Bike runs great. Any ideas besides wrapping my pegs in foam? It didn't used to do this.

In fifth gear it's 57 mph when the vibrations comes in so about 5500 RPMs. There is a change in noise from the motor too. Valves do this? I"ve never checked them or the timing chain? Bike has 12K miles. 06 DRZ S

Any thoughts? thanks..

Must suck having dumb feet...... ;)

Make sure all the engine mounting bolts are tight. This includes the swingarm bolt (the biggie). Do not forget about the one on the bottom of the fron of the engine.

[quote name='William1']Must suck having dumb feet...... ;)QUOTE]
LOL:lol:

what happens when you increase rpm?

my feet haven't won any contests or anything but it would be a little harsh to call them dumb :smirk:

Yeah I noticed that typo right after i hit post and couldn't change it in the edit field!

As engine RPMS increase the vibrations stays present. It's hard to isolate eith increased engine speed but it's there. It doesn't seem to get worse or better with more engine speed. It's jsut there or it's not if i'm above or below 5500 rpms

sflash868 said:

So this only happens at 57 mph?
But if you pull the clutch in, it stops?
What happens if you run it to 65? Is it still there? (if not, it's probably tire related actually).
What happens when you pull the clutch in if it's still there at 65?

I don't think your problem is engine related if it only happens at 57 mph+
If it happened at 5500 in every gear, then yes, engine.

Could be tranny, chain, tires, but I really doubt it's the valves, pistons or crank.

I had a similar problem. 6500+ rpm would make my hands go numb. Over time, it started to hit my butt and feet.
Solution: replaced the whole engine. It wasn't cost effective to hunt down the problem.

Yeah it happens in all gears after 5500 rpms and stay there until the RPMs drop. I do notice that the vibration is the most pronounced when i'm neither accelerating or decelerating. I think a new timing chain might be worth it. no?

I am curious to hear the outcome of this one as well.:ride:

sflash868 said:

I'd inspect it at the very least. It could be a link that's out of whack, but it could be anything. In my case, I decided it wasn't worth the headache since the bike was worth less than the cost to diagnose it and most likely to repair it. This was on an inline four though.
On a single, it should be a lot less complicated. Perhaps less expensive too.
Or, you could just stop accelerating when you hit 5400 RPM, that's the easiest and cheapest route in the short term.

Have you changed the oil recently? If not, I'd do that first and look for metal bits (chunks or shavings) in the oil. Might not hurt to have a magnet handy to fish in the oil pan.

Good luck.

The DRZ is a pretty smooth motor. I dont think a single motor mount would cause such a buzz. I would pull both sidecovers off and take a look around.

i vote tire issue. Check your pressure. Also as a test take off the dumbo ears and see if that smooths it out.

I don't think it would be a tire issue if associated with a specific RPM, no matter which gear

RUST359 said:

probably true... I skimmed that part.

Tires? No. They wont tingle your pegs. Its motor related. If its bad enough to cause vibration in the pegs its either from the motor or its mounts or frame.