Brozz 250, open exhaust and new air filter

[MarkLowryIII]

Hi guys. I've done something really weird and turned my Brozz 250 into a chopper. Basically everything from the steering head on back is a new hardtail. My question is this: Since it now has a straight pipe and a new air filter (no breather box), do I need to fiddle with the carb to keep it from running too lean?

[Bill Hilly]

Originally Posted by MarkLowryIII

Hi guys. I've done something really weird and turned my Brozz 250 into a chopper. Basically everything from the steering head on back is a new hardtail. My question is this: Since it now has a straight pipe and a new air filter (no breather box), do I need to fiddle with the carb to keep it from running too lean?

Yes. It should be lean now after doing the work you did. If it's the stock carb, then you won't find a pilot jet, but you may be alright if it's a 36. I can't remember what my Brozz had. Unless you're at pretty high elevation, you will probably need about a 115 main, and may want to shim the needle to raise it a hair.

[JohnC]

Here are jets for a stock Keihin carb I used on my 2020 Brozz 250.

Here are the main jets, (the pilot jets here do not work though.)
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

Here are the pilot jets.
https://www.aliexpress.us/item/22518...2usa4itemAdapt

John