Home › Forums › Shifter Karts › CR80 Jetting help
This topic contains 3 replies, has 3 voices, and was last updated by Bob Schabel 4 years, 4 months ago.
I have a CR 80 modded engine, Mikiuni car, pump around system. 85 degrees F Need a suggested main jet starting point.
Are you running an airbox or a K&N style air filter?
What altitude are most of your tracks?
Most of my tracks are about 1,000 feet above sea level, I run a K&N style air filter, I am running a 195 main.
If you are running an airbox, I would try 190 or 185, I’ve heard go down 2 jet sizes for an airbox.
What ever you do, check your plug every time you make a jetting change. You are looking for the center insulator being brown to light tan, if it is white or gray, you are too lean.
Hope this helps.
#55 Honda CR80
thanks, I run KN style air filter, alt=700ft. I run a 195-200 in my stock motor. was told by someone for the mod motor needed a 380-360 jet? So, thanks for the help, I’ll start at 200 and see what the plug tell me. bob
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