I am going to be upgrading my Carb on my 09' KLX250 for better take off and responce.
I have stock exhaust and a DynoJet stage 1&2 kit in the stock carb, along with a 13T drive sproket.
I wont have the cash for a new exhaust, so I'm going to upgrade the carb first.
Anyone have thoughts on sizes, brands, styles, and vendors?

 

351 kit is not much more than a new carb and a lot more power/$$$. In fact it is the most bang for the buck than any other mod PERIOD.

 

^ as durielk says!

The pumper will improve response and snappiness which may feel like more power, but any real power gains will be limited at best. But if you need one, search around here and you'll find several good threads. TM36-68 and Bill Blue's bored out TM34 both come to mind as popular choices.

 

The exhaust and rejetting should come before a carb or big bore any day.

 

Cubic Inches beats loud pipes any day of the week. PERIOD

 

This.


I'm pretty sure my stock exhausted 331 could take any piped but otherwise stock 250 klx out there.


not trashing on exhausts or anything, i want one myself, but when it come to HP increases the big bore is the most for the money.

 

So who said the pipe had to be loud?

Wildcard, neither did anyone say the bike wouldn't be faster with a big bore kit with a stock exhaust...assuming the jetting and intake were appropriate...but there's a reason that there's a semi-logical approach in modding a bike, hotrod, or most other vehicles in a performance effort. There is no absolute requirement as to the order in which an individual mods their vehicle, but there's a reason you seldom see someone drop in a big block V-8 to replace a small block V-8 and retain the minimally sized OEM single exhaust. If you're going to the trouble and money to upgrade the carb and/or the displacement, you get much more return when you give the engine a place to expel the gases from those mods. But there's no law against it...yet.

 

Your reasoning is flawed, CC rules. PERIOD

Everyone likes to have loud pipes cause they think they're cool. "Think" being the operative word. My buddy wanted to put a exhaust kit on his Miata, sayes it was going to give him 20HP, sheit. I asked him how much the turbo kit was.. $200 more. And how many more HP? 75HP. PERIOD.

 

PERIOD!, eh? Well, that's enough for me.

 

But a turbo kit doesn't add cc..it increases air flow and wouldn't be as beneficial without an aftermarket exhaust...and 75 hp on a stock miata seems like an unreasonable gain for a turbo.