I want to buy a new carb for motorcross racing i currently have a 40.5 mm pj. I was thinging about a 38mm pwk a/s. My motor is ported polished v-force 295 kit bills pipe reed spacer and a k&n filter. I'm wanting more bottom end my bike has LOTS of top end but i want more botton end grunt. Thanks

 

a 38 A/S sounds right. Your 40.5 is hurting you on the bottom end

 

The 38 A/S is a good carb. I have a new Boswell carb for sale if you are interested. The Boswell makes amazing amounts of bottom and midrange power. It comes with a custom aluminum intake manifold. They are no longer available and originally sold for over $400. If you are interested email me. I will make you an amazing deal. Parts are readily available because Boswell used Mikuni TMX carbs and modified them. I also have a Mikuni TMX carb that would work as well as the A/S.

 

Blaster668, i think i wana stay with the kehin carbs because i have lots of differnet jets and other stuff for them but thanks for the offer

 

Jets=goofing around
Get a Lectron dude! 38mm...I agree that the 40 was way big
tcracingengines.com
He will send it to you set up with simple directions~~ install and run,adjust nothing!
last one I bought was a lil over 200$