the TB's is a nice looking pipe and doesn't stick way out like a lot of the others,,less "burns"..haven't heard back from hmf ,so i might be getting a TB too!

 

I just installed the TwoBros M7 with P3 insert. TwoBros said no rejetting needed but what is your experience?. Seems to run good but pops some on throttle off decelleration.

 

Hmmm. If it does not require jetting. That sounds like a bad thing to me.

Exhaust is suppose to allow more air through the engine and if more air is going through the engine then you would need to richen the jetting to allow more fuel to balance.
So the equation goes something like; as more fuel and air is allowed though the more power that can be made. Am I missing something here?

Anyway Big Gun required jetting.

Oh and a little plug here:
My Big Gun Evo R Full System with the Quiet Core is for sale if anybody is interested.
It is powerful but also loud too.

 

To get the best you bike needs rejetting, especially if it's USA spec. #138 main, #38 pilot and the stock (AUS) N1RX needle raised 1.5 mm. Plus Backfire screen removed, Twin Air filter and no airbox lid. Works for me at sea level up to 1000 feet.

 

they say at TB's....you dont have to rejet...your gonna want to...

 

Oh lol,,

 

Fellas, been searching around on craigslist and found a guy selling a fmf 4.1 exhaust system. is this the correct one for the klx250? i haven't jetted or anything but figured if i could get a deal on an exhaust system now i could have it for later... thoughts?