Hawk 250 jets
 

Hawk 250, mikunni carb,
if I remove cat, what jets will I likely need to go to?
I'm mostly on street.

Hard for anyone to narrow things down for you without knowing your specific altitude ;)

Need to know if you opened up the airbox and also altitude you plan on riding at before I could even begin to recommend jet size.

Has been opened up considerably. Still retains stock style filter. It could easily be modified further accordingly. I'm at about 600' , Nashville TN area. Won't likely get much higher.
I've got the pipe and welder ready. :)

I'm running a 117.5 main and 30 pilot jet with an aftermarket air pod intake. I'm running a little rich. I'm at about 800 elevation. with cat removed, I might be in a little better shape. I'd stick with the 115/30 at first and adjust from there.

Thnx. I'll double check what I have. Pretty sure it's what ever most commonly recommended

I have a 130/27.5(down from a 30) and I have a new exhaust and pod filter. Still not running perfect for me. I think each engine is different and you will get slightly different answers. Also mileage matters. I am just under 500 miles so fully broken in yet.

rally good point. I'm at about 750 miles now and it keeps improving. I was riding with Mark on some N.GA mountains and his hawk was maintaining on uphill grades better than mine.

115/25 works well with the nitrohead racing muffler (short wide header w/out muffler but a flute insert), 30 is a little rich, perhaps 27 would be ideal.

No idea why I said 130/27.5 I am really running 115/27.5

Gained 2 mph after removing cat.
It was worth doing