Here are my issues with an 07 wr450..... Some help pls
Posted June 16, 2010 - 12:13 AM
Posted June 16, 2010 - 04:06 AM
Regarding water crossings. Re-route the upper two vent hoses from the carb up high under the the tank.
You can vent the engine vapor hose outside of the air boot, just be sure to close off the opening into the boot. Not sure why this is a problem for you though.
Rough running - You need to define it further. Steady thottle? Only when accelerating? Up hil? Down? Varies with temp/altitude? Current jetting and modifications?
Stall off of idle requires fine tuning of the AP (leak jet size and AP timing adjustment). You can broach this once you resolve the rough running. Typically, it involves running a smaller leak jet (between a #40 and a #60) and adjusting the AP timing screw (usually CCW between 1/2 and 2 turns)
Posted June 16, 2010 - 11:30 AM
Mods are throttle stop, grey wire, A.I.S removed, airbox opened up, Two Brothers full exhaust, and re-jetted.
Is it better to put in a JD jet kit?
The rough running is when i'm at a constant throttle. If i'm on and off all the time it seems fine, sometimes a bit of hesitation but not to bad.
My altitude is about 1800ft and wouldn't change more than a couple hundred ft. temp is pretty consistant also
Thanks for the help I'm going to re-route those carb hoses. Do you think that the airbox hose is not an issue?
Posted June 27, 2010 - 06:09 PM
the breather hose was purposely put there by Yamaha to prevent water getting sucked into the motor. I would leave it like it is. In fact, some yz450 owners are converting their breather system to the WR's to prevent the water injestion problem.
what 'bout the water that gets into your airbox? Also does anyone know the largest size of tire you can put on? Does that TeraFlex tire fit?
Posted June 27, 2010 - 06:55 PM
Posted June 29, 2010 - 11:43 AM
Posted June 29, 2010 - 01:05 PM
Posted June 30, 2010 - 05:47 AM
i have an 07 with the air box opened,,,and i have never had those problems ive crossed water up to maybe half way up the case,,, it makes me wonder why one bike would have that problem and not another,,,
I've noticed a littler water sitting in the bottom of my airbox also