DRZ 400 lumpy ride?

[ops.normal]

Hi all

Just picked up a DRZ400, 2003 model from TM. 5000km on the clock, and almost exclusively off road (so I wouldn't be suprised if the odo was disconnected for a little while...).

Long and the short of it, the brakes are coozed so new pads on the way, so sorted there. My current issue is anything over about 80kph the ride gets a bit lumpy. I can't really tell whether it's from the front or the back, though I suspect the back is more likely.

What's this likely to be? It has quite aggressive semi knobblies on it (road legal) so is the rim out of true or something?

Thoughts?

Cheers guys
O.n

[Katman]

Does it still have the rimlocks fitted?

[ops.normal]

Standby on that, I'll check it out.

[ops.normal]

Yes, rim locks on front and back...

[speights_bud]

Quite likely well out of balance given the weight of a rimlock and the speeds your talking about

[ops.normal]

Yeah, I'm gathering that :P So this is my first off-roady type bike, I take it this is par for the course? Or are the rim locks not required unless you're dropping the type pressures way down? I'm just trying to get a feel for what the done thing is with these types of bikes.

[tri boy]

It's an off road bike.
adjust, or sell. MHO

[ops.normal]

Yeah look that's cool, I'm just trying to learn what is normal operating for these machines, not having a winge.

Are the rim locks critical to the whole deal, or can they be removed?

[rogson]

The wheels can be balanced with the rim locks on - just requires more weights.
But, the tyres also affect the ride. Aggressive knobblies are not nearly as smooth/comfortable as more road oriented tyres - and and wear fast on the seal.

[Katman]

Are the rim locks critical to the whole deal, or can they be removed?

There isn't the need to use rimlocks if you're running the normal road going tyre pressures.

If you're not planning on riding the bike on the dirt I'd be inclined to remove the rimlocks.

[ops.normal]

Cool, thanks for the help fellas.

[F5 Dave]

Derdging, obviously you have spun the wheels to check if they are round? I followed a Husi yesterday on a road section of a trail ride & the rear wheel was jumping about.