weird noises

R3 '06,just had the bike out for the first ride of the year Now this is not new, heard it last year as well, doesen't seem to hurt the bike:: when riding the back roads and going over bumps and such , I hear clunking noises comming from the power train area ( i think) it happens as I go over the bump or such and my hand rocks the throttle a wee bit. seems like a lot of smahing or crashing, If I go over the same bump or such with my hand off the throttle, it's as solid as a rock?? It souds like gear play or something like that, anyone experience anything like that ?? I'm riding about 50 mph, 2000-2500 rpm 4th gear if that makes a difference. 17000 mi. on bike..?? note: I bought this bike used last spring.

Might be worth looking at the Cush Drive Rubbers in the rear wheel centre.

Hey out there!! any other ideas regarding my problem?? I can't have the only bike like this ??

I have an 06 with the upgrade kit. But even before the upgrade, I didn't ever hear anything like that.....just a bad second gear. Do you have a center stand?

No center stand, it sounds like there is a bucket of chains under the bike,, also when just coasting and giving it some throttle the sound occurs ?? tight as a drum when going over hill & dale with no throttle at all , go figure? note: does it in any gear .

Sounds like a loose timing chain to me. Better get it looked at ASAP. I have somewhere a piston with a piece of valve imbedded in it