Posted October 06, 2010 - 05:46 PM
If so, how often do you need to use them.
Do you keep spares of what you have and some different sizes?
I pulled the carb on the WR tonight, I think I could rejet it in 30 or 40 minutes.
My bike currently has:
Leo Vince full titanium exhaust
03 YZ450 Cam
YZF450 Quad needle - set in 3rd position
Fuel screw 2 turns out
This is to run at sea level to 2K' or so.
(I bought the bike jetted like this)
If I went to 6K would I need to change the jetting and if so what is a good assortment to have on hand?
Posted October 07, 2010 - 08:07 PM
Posted October 07, 2010 - 10:35 PM
Basic rule is if the elevation is more than 2,000', a rejet will make a noticable difference.
If you went to 6k, you would need to lean everything out. Probably at least a size on the pilot, main to 160, needle on the first clip at a minimum.
Fuel screw should be reset for temp/alt/air density change.
Posted October 08, 2010 - 05:34 AM
I guess I'll just throw a jet in my regular orders here and there.
Posted October 13, 2010 - 10:12 AM
This is how my bike is currently setup.
Cam Timing: 2003 YZ 450 CAM
Fuel screw (turns out):2
Needle Model/Clip position:3 (Needle from YFZ 450 quad)
Grey Wire Mod (Y/N): Y
TPS Connected (Y/N): Y
Airbox Snorkel/Lid (on or off): OFF
AIS Removed (Y/N):N
Exhaust Brand: Leo Vince full system
Average Altitude:Sealevel ( California)
Average Temperature: (60-90)
Average Humidity: 60-70
Degree of Satisfaction (0-10): 8
I would like to sometimes run a stock 01 YZ header and exhaust (I have a new one).
What would be a good place to start on jetting for that?
What would a good few main and pilot jets be to order to have on hand, say I want to order 4 or 5 of each to start with?