boysen reeds

[Realest]

i am waiting for a set of boysen reeds to come in for my 95 yamaha DT200. just wondering what i can expect from them once installed. also is there a need to rejet?

 

[jaguar]

Probably no difference but theoretically if the reeds allow more air/fuel flow then you have to jet leaner (go to a lower number on the main jet and drop the needle one notch).

 

[helio lucas]

jaguar,
i believe if the reeds allow more air in the cranck case (assuming a lot of things) you need to jet richer not leaner...

realest,
from my experience they usually give a little more bottom end and a smoother hit, sometimes with more over rev.
but since your bike is a strange design i will not make any prediction... but will be nice to hear the final and real result :cool:

 

[TRexRacing]

If it needs jetting it won't be far enough off to hurt anything.Ride it and do a plug chop if in doubt.

 

[jb_dallas]

All things held equal, the jetting will need to be leaner, not richer. My boyesen power reeds made a big difference in my bike, 82 RM 125. I jetted leaner and it made a big difference.