What is the price tag on the Lectron 48???

 

Scooby, Are you simply saying " If I go with a much larger than stock carb, It is vital to increase valve size as well."

While a carb might just bolt on. Increasing valve size is not for the weekend wrencher. Making it way out of my league.

If I just bolt up a larger carb will I see more power without increasing valve size?

 

it's a weakest link concept. start with the weakest links first:

1) stock exhaust tip
2) intake manifold porting & larger carb

it's not the stock carb size ALONE that is a restriction. it's the stock 2-into-1 manifold and stock exhaust tip combined with the carb size.

for a 100% stock DS650, going larger on the carb without freeing up exhaust won't gain much of anything. the stock exhaust tip has to go (first in my opinion), followed by the ported manifold and larger carb.

i do think the stock cylinder head is a restriction also. but you can make decent power with stock valves on a stock bore/stroke DS650. like you said, the valve job is a big chunk of money not for everyone. some cheaper porting/chamber work with stock valves might be a compromise.

check hp research website for dyno charts.