Another WR glitch ??
Posted June 27, 2004 - 04:06 AM
Posted June 27, 2004 - 04:43 AM
Posted June 27, 2004 - 12:25 PM
Posted June 29, 2004 - 09:51 AM
Posted June 29, 2004 - 02:08 PM
yamahas (and most four strokes) will back fire when the pilot jetting is a little lean. how this would build that much pressure in the crankcase is beyond me. all i know is that it has not happened again. we did richen his jetting, though. in the winter(when it happened)we went to a 48 pilot jet. now that it's warm, we went back to the 45. we turned out the pilot fuel screw till it no longer has the small back fires when you get off the throttle.
Posted June 30, 2004 - 04:47 AM
Posted June 30, 2004 - 05:48 PM
Posted July 03, 2004 - 03:58 AM
when it happened to me, it was only when i was really gettin on it and the pressure was building up. and i put it back together because the breather didnt look kinked too bad, it wasnt totally kinked but it was a little, after it blew out again i had to make a different breather tube and it worked fine since..
Posted July 03, 2004 - 01:59 PM
What size is the stock pilot jet. We put the JD kit in since I have had good luck with it. Now that you mention it, it does "POP" on deceleration...maybe that is what caused it. Verde...let's try the pilot jet. I always thought that the popping was the result of a rich condition on deceleration. Is it actually too lean? Also...WR372, we took it to Clawson's and they have always been pretty good, I just could't figure out why they would not fix it with only 150 miles on the odo. Thanks guys for input..me and Verde will keep you posted on the end result.