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need jetting help
Posted: Wed Mar 06, 2013 1:07 pm
by 02crfrider
I just bought my first 450 its a 02crf 450 it has a fmf slip on on it and what appears no air box lid but when I started it the head pipe turns red and is backfiring when u let off and doesn't want to idle... any help would be greatly apprieciated[/quote]
Posted: Wed Mar 06, 2013 1:10 pm
by crfsonly
welcome to CRF's Only and congrats on your new ride. get the JD jetting kit and an adjustable fuel screw:
http://www.crfsonly.com/catalog/product ... ts_id/1094
http://www.crfsonly.com/catalog/product ... ts_id/1333
both will get your jetting spot on.
again, welcome.
Ken
Posted: Thu Mar 07, 2013 9:36 am
by saefabri
I ordered the JD kit and fuel screw. Expect them to arrive within few days. I don't have the instructions yet but I guess I could do the jetting myself without surprises.
is it possible to access needle jet without taking the carb out?
Posted: Thu Mar 07, 2013 9:44 am
by crfsonly
yes...you will be able to install it without removing the carb. here's a how-to link:
http://crfsonly.com/howto/450x/jetting/ ... needle.php
ken
Posted: Tue Mar 12, 2013 7:30 pm
by 02crfrider
I have now added a head pipe but i was hoping for a size to start out figuring from.. Any help is appreciated