black plugs

[yamahakid1]

first off i got a 98 banshee its got a port and polish pro circuit pipes and its got the kand n filters with outerwears that clamp directly onto the carbs. also it starts first kick at my house . i live in the northwest and will be going up to 400-700ft up in the trask and stuff. its definately wet out and getting colder 40-50 degreez. now since the plugs are black should i change the main jet from a 300 to a 280 because i changed the needle clip from 4th clip to 3rd clip down runs better. i just know black means its to rich and i think ur supposed to jet the main jet down if it will be higher elevation and colder since it will be leaner right? or shouldf i just save the trouble and get a dial a jet?

[Banchetta]

first off i got a 98 banshee its got a port and polish pro circuit pipes and its got the kand n filters with outerwears that clamp directly onto the carbs. also it starts first kick at my house . i live in the northwest and will be going up to 400-700ft up in the trask and stuff. its definately wet out and getting colder 40-50 degreez. now since the plugs are black should i change the main jet from a 300 to a 280 because i changed the needle clip from 4th clip to 3rd clip down runs better. i just know black means its to rich and i think ur supposed to jet the main jet down if it will be higher elevation and colder since it will be leaner right? or shouldf i just save the trouble and get a dial a jet?

422412[/snapback]

Plugs will vary in color from different riding. Do a true plug test, run it wide open in 6th gear for 5-10 seconds, shut it down, coast to a stop, pull the plugs. Guanteed you'll see a different color. Thats how your supposed to check the plugs. Also colder air requires more fuel.

[2003LimitedBanshee]

I've heard not so spectacular things about the Dial-a-Jet, plus jetting is not that difficult, good jetting takes a little more skill, but still doable for the DIY-er. Colder temps mean more dense air, ie. leaner, so you have to jet up within reason (depending on temperature difference). Higher elevation means less dense air, ie. richer, so you have to jet down with same stipulations as above. Do a Wide open throttle (WOT) plug check, this is where you determine if the main jets are appropriately set... from there tune the midrange with the needle setting.