34mm from 28mm

[jhackwit]

I am switching from 28mm to 34mm carbs on my modded shee and wondering what kind of increase I can expect. I understand that all the increase will be on the top end with some loss of bottom end. Just wondering how much? Right now I have a stock bore with a cool head with Trinity porting, prolite pistons, boost bottle, reed spacers, and pro circuit pipes. Anybody done this?

[svtkid78]

You pretty much nailed it on losing some bottom end. You will feel a considerable amount of power difference though. If you don't want to lose any bottom and still have gains i would go with a 2 into 1 carb.

[BdBanshee]

Your low end power is going to be determined by your porting, pipes, and how close you get it jetted. I have ridden Banshee's with 34/35 mm Keihins that used to have 28's, that had just as much power on bottom and a lot more on top.

 

I bet you'll like it, I know I do.

[jhackwit]

thanks for the posts, kind of what I guessed. hoping it makes a good improvement. we mostly drag race at Pismo Dunes.