have a question on jetting i got my yz a couple weeks ago i was going threw the bike and noticed the jetting on the bike was 48/178 the last owner said it was jetted for the coast but to me thats still really big jets for only haveing a full exhaust and a uni filter. am i wrong or should i drop it down a little. the only thing i have noticed with the bike is at low rpms at a quick hit of the throttle it acts like it kinda hesitates for just a quick sec. just didnt know if that was normal for a 4 stroke this is my first everything else i have owned have been 2 strokes.

bump

does anyone on this sight know anything about jetting?

Not really I've always had the dealer Jet when I had a carbed bike since they already knew how to for the high altitude I live in.

Here is an article on it
How to Jet a Dirt Bike or ATV Carburetor Article on 4Strokes.com (http://www.4strokes.com/tech/howtojet.asp)