Jetting and spark plug test
Posted July 13, 2002 - 08:39 PM
What do I have to change to get nice brown colour like mine friends KTM and my old XR6?
[ July 13, 2002: Message edited by: sabin ]
Posted July 14, 2002 - 07:36 AM
PJ/PAJ MAJ/MJ Needle and clip setting...
Your metal sound could be a multitude of things. I would tell you to check your oil galley bolt for flow but you have been riding without seizing so that should be good. Your plug was in tact when you pulled it so that would basically rule out FOD in the combustion chamber. If you do not have a Zip-TY racing magnetic oil drain plug ..Get one... this will give you a good indication of what is going on in the lower end when you change your oil...
Posted July 15, 2002 - 06:58 AM
My settings are:
TwinAir air filter with Airbox cover is in place.
Racing exhaust system from front to end.
I changed the MJ to 170 and raised the needle to 5th clip. The plug is now nice tan colour, but its does not rev good. I also have some trouble with the 1/4. I can feel the bike missing. It accelerates like hell, but cannot feel good on steady throttle, it's like going front-back-front... I think I have some unburned fuel as my exhaust fires blue flames from time to time at reving on neutral. How do I get the correct setting of the PS?
I'll try with MJ160 to see what will happen. Do I have to lower the PJ when raising the needle? I can order only from yamaha dealers over here, and delivery is one month.
Thank you for your time!
Posted July 15, 2002 - 07:12 PM
I put the 165 MJ back and the bike revs nicely. I can feel in my wheelies that the power is not smooth like before, in the middle, and I am still having trobble with low to mid rpms on steady trottle. What does this mean?
Posted July 15, 2002 - 07:34 PM
all the tests are made on 1600ft altitude, when I ride all in the working days. In the weekends I ride on 5000 - 6500ft. If I set the bike to work ok in 5000ft won't it be too lean on 500ft and brake the angine, or how to know when it's too lean?
Posted July 17, 2002 - 12:16 PM
The metal sound you heard was probably a wire hose clamp. Are you short one on your carburetor hoses? Also, a large part of your steady throttle problem or lack there of is the grey wire…un-hook it.
Posted July 22, 2002 - 10:51 PM
This sound is not a problem, as I did not hear it again. Maybe it was on the joint of the header pipe and muffler... About the jetting I returned on my original settings. I do not have the grey wire connected, as my bike is European model. I have now nice power all the range and no gaps, maybe this mean my jetting is fine, is that so? I do not want more power, but just to make sure I'm not lean and I'm not going to break the engine running lean...
Thanks for the reply!