Posted August 13, 2001 - 05:39 PM
Posted August 15, 2001 - 04:50 AM
I can't tell you to change them as I'm not familiar with high altitude jetting. Perhaps some other hi-alt guys can help with exact details, but it would help them if you stated the mods you've made other than YZ timing (pipe, airbox, etc)
However I can say that experimenting will REALLY help you dial it in. Make one change at a time, eventually you'll see what the changes do for you and can dial the power up or the same as you have today accordingly
I had to go richer on my pilot jet 1 size, richer on the main jet 2 sizes, increase the main air jet from #75 to #100, and change the needle from stock DRS to YA style EKN#4. The fuel jets above may be too rich for you, but the air jet and needle above may work pretty well with what you have. These changes were from a well running WR timed stock pipe to a snappy YZ timed w/ stock YZ pipe.
Posted August 15, 2001 - 05:51 PM
Posted August 15, 2001 - 06:21 PM
To get at the needle, remove the tank and use t-handle allen wrenches to remove the top cover (two screws). Now remove the locking allen screw to expost the needle. A wire hook or (very) fine tooth pliers is needle to get the needle out.
The main air jet at the bottom intake area of the carb under the black plastic cover.
When I remove my carb I remove the throttle cables, drain the gas, and slip it out to the left side of the bike.
What are your symptoms and what parts did you order?