WR426 motor vs. YZ426 motor
Posted June 12, 2002 - 09:30 PM
thanks ahead of time
Posted June 12, 2002 - 11:25 AM
Gearing is different, primarily in 1st and 2nd.
Timing is different for the motor.
Typically rear spring rate is softer on the WR
WR has 18" rear rim and YZ has 19"
WR has air cut valve on carb, YZ doesn't.
Somebody help with more.
Evaluate what it is you are going to be riding. I have not riden my YZ anywhere that I found a WR might be better, but I have not encountered everything. I think it is easier to adapt the YZ to off-road/woods, than it is to take the WR to the track.
Best of Luck and Both are great machines
Posted June 12, 2002 - 11:44 AM
The jetting is very different, I think only the needle (and PAJ) is changed but it is still a large difference, IMO this is due to the restrictions placed on the motor in the form of air box lid and small exhaust (both also cheaply and easily changed to a psuedo-YZ state).
The carb also has what is called an Air Cut Valve, this has given a few people jetting problems because it leans things out at lower throttle settings. Again, this is easily disabled, so in a few minutes and with a few dollars you could make a WR run exactly like a YZ.
The thing you need to base your decision on then is the gear box. First gear in the YZ is very tall, taller than most other MX bikes. This can make it a handful in tight going. Fifth gear is very tall in the WR, about 14% taller than the YZ, so if you aim to do any dual sporting you may want the WR…
Just about every other WR vs. YZ difference is easily changed, with the only big ticket item being replacing that wacky WR seat and tank. I’m 6’1” and it feels like that tank is in my lap…
But it sounds like you will be getting the WR.
Posted June 12, 2002 - 11:46 AM
Posted June 12, 2002 - 11:57 AM
Thanks for the reply. In the past I've just dropped a tooth or 2 on the front to bring first down to a reasonable level for woods riding (on the MXers that is), but I was only doing that because I liked the powerband on the MXers so much more than the generally tamer WRs. If the WR's motor is (or can be) similar to the YZ, I think you're right, I'll buy the WR.
Posted June 12, 2002 - 12:26 PM
Posted June 12, 2002 - 07:36 PM