xr200 engine vs street bike

[Terminatr]

Hi.

 

What is the difference between a dirtbike engine (like XR 200)  vs a street bike engine (like CB 125)?

 

I notice XR have more vibration than a street bike. My XR has a tiny amount of vibration that is not noticeable

on dirt, but is noticeable on pavement at any RPM. 

 

I rode a chinese Lifan 200cc sport bike, and the Lifan was very smooth running on the street. There is almost no

vibration, until high RPM.

 

What makes a street bike engine so smooth? Is there anything I can do to my XR to make it more smooth on pavement? I'm trying to turn my XR into a commuter, so I don't have to buy another bike.

[The Stone]

Are you sure the vibration is from the engine and not the tires? If your xr has knobbies then that's what is causing the vibration... First try a set of DOT approved dual sport tires and see if the vibration is gone.

[Terminatr]

No, vibrate is not coming from the tires. I can feel the vib when the bike is stationary. Every dirtbike I've ever owned (5), has this kind of vibration.

I've checked all the motor mount, and they're tight. You wouldn't notice it on dirt because you too busy having fun. But when you ride on pavement, it gets kind'a boring and you will start noticing these little things.

 

I've been reading this morning, and read that some Lifan has counterbalancer in the engine. That may explain why it's so smooth.

Edited June 25, 2014 by Terminatr

[teamrude]

counter balancer helps. Also motor is probably rubber mounted.