Honda cbr125 bad vibration?

I have a Honda CBR125r 2006 . The bike seems to run fine and pulls really well for a 125 however if my RPM's go over 6-7 k it vibrates like made, seems to be engine, but not sure. Any ideas?

Get the wheels balanced. Put a new chain/sprockets if the one on the bike is near maxed out. Check mechanical timing. Get the valve clearances checked. Check for good spark. Check compression.

If you have a vibration, and when you upshift and the vibration lessens, it is the engine, not anything about wheels, chain etc.
Timing, valves, spark, compression, etc. Does not increase with RPMs. If you don't lose power at higher RPM, no problem.
The 125 is a single cylinder motor, probably not counter balanced. As the RPMs increase, the vibration will increase.
If you are a new rider, one that has never rode a single bigger than a 50cc scoot, the vibration is probably NORMAL.

Does it have rebuilt engine? If so, the moving engine components (pistons and rods) probably didn't get properly balanced and there's nothing you can do except rebuild it properly or keep the rpm lower.

Find some one else with the same bike & ask them to ride it & check. Quite likely that the amount of vibration you feel is normal for a single.

Single shake at some rpm range- nature of design. Check top motor mounts and then case mounts, then look at wheels, swingarm, chain/sprocket.

On a single cylinder motor that would be NORMAL. 2 stroke engines are even worse. I wear thin leather dress gloves and that takes away most of the vibration through the handlebars. It helps ALOT.

Then don't let the RPMs go over 6k.

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