What does WR mean? Wide Ratio?

[Rambunctous]

A buddy asked me what is the difference between a WR and a regular bike. I really do not know. In particular a YZ 250 WR four stroke. How does this affect its rideability? Can we toss this around and give him a answer? Thanx in advance, Mike.

[butcher bergs]

The Yamaha WR bikes are more or less a YZ with a wide ratio transmission, meaning the cogs have larger ratio gaps when compared to the gearbox of a YZ in which the cog ratios are closer with each respective shift.

[Rambunctous]

Does that mean that say if you upshifted at 10000 RPM that on a regular bike the RPM's would drop to say 8500 but on a WR they would drop to say 8000 RPM? Would first be lower and sixth higher?

[butcher bergs]

Not sure of the details of it, but that's how I understand the Yamaha WR....think it's only the 5th and 6th cogs. Again, not completely sure.

[seth399]

ya I think some people who ride yz250 for woods swap transmission gears for wr stuff

[ssg]

I always thought it stood for wicked rad, because riding my WR in the woods was rad, but riding my YZ in the woods sucked ass ass ass.

[R7]

A buddy asked me what is the difference between a WR and a regular bike. I really do not know. In particular a YZ 250 WR four stroke. How does this affect its rideability? Can we toss this around and give him a answer? Thanx in advance, Mike.

Well there is no such thing as a YZ 250 WR fourstroke
YZ250F and WR250F.
Not sure if the real reason it's called a WR is because of the wide ratio gearbox or not? I think it's just yamaha's designation letters to that bike
YZ = MX
WR = Enduro
There are many more differences in the WR vs the YZ than just gearbox. While the engine is similar in design, it's not the same. The WR has a heavier flywheel than the YZ which makes it much more rideable in the woods and nasty stuff. A charging system and E-start as well on the WR, and the WR suspension is much softer than the YZ, etc, etc

[gregp]

The WR also has the neutered carb (throttle stop - easily rectified), and will require a snip of the gray wire (timing retard?). The 450's had a cam timing change (again, easily rectified), not sure about the 250's.

[Rambunctous]

In particular he is thinking about looking at this
http://cgi.ebay.com/ebaymotors/Dirt-...item19bc5cb44a

[seth399]

In particular he is thinking about looking at this
http://cgi.ebay.com/ebaymotors/Dirt-...item19bc5cb44a

seems like a nice enough bike to buy, I'd tell him to skip only if he wants to ride mx almost exclusively

[gregp]

Nice bike! FWIW - The yamaha's have the strongest reliabilty reputation. That bike could Moto all day, but maybe not at expert levels.