Suggestion for Jetting??
Posted July 13, 2005 - 11:47 AM
99 wr400 throttle stop removed, air lid removed. I also moved the needle, but did this in 99 and don't remember where.
yz timing, grey wire cut
FMF mega max II exhaust with the lowest amount of disks installed, I think its 3 or 4?
So if I could get some suggestions as to what I need to jet it at, that would be greatly appreciated. Thanks.
Posted July 14, 2005 - 06:46 AM
the grey wire. you have disabled your rev limiter which cuts every third spark to prevent the motor going pop due to excessive revs. they put the rev limiter in the bike so as to prevent the likelihood of it detonating between your legs
Posted July 14, 2005 - 09:16 AM
Posted July 14, 2005 - 05:17 PM
Posted July 14, 2005 - 05:21 PM
I think a lot of people are making a lot of money selling all of us WR owners fancy jet kits. They need us to believe that the jetting is messed up and all kinds of hidden power will be unleashed. My bike runs better and stronger than it ever did with what let's just call "funky" jetting.
Posted July 14, 2005 - 05:44 PM
Anyway, every bike is different, and most of us are riding in different areas. There are a lot of good jetting articles to be found on the net for thumpers. Most agree that stock pilot jetting is usually on the lean side for emissions purposes. The manual also has some good advice. Just try and change one thing at a time, take a test ride, note the differences and so on.
You'll get the hang of it after a while. Try to order a 48 and 50 pilot from TT, they are cheap there. Order some mains too, so you can mess around. The YZ400 comes with a 45 pilot and 165 main stock. Rip that bowl off and check to see what's in your bike first.