Mossbarger reed box.

I just received a complete mossbarger reed box setup for my 430cr. I noticed the reeds are set back from the edge of the mounting plate. Like 3/16" back. For years I been installing a 3/16" to 1/4" spacer inbetween the reed box and the cylinder to give more breathing room. I even spaced the reed holder on the 125cr Honda and the kdx220 bikes too. Just an addition to the porting and letting it breathe more. Have you guys installed these spacers too?

I don't use one on my 81 430 with the mossbarger . The mossbarger reed block is already longer than the stock reed assembly . Using the mossbarger , I had to trim the boot from the carb to the air box and the end of the carb is just about flush with the air boot inside the air box .

Maybe it will fit in the '83 frame?

The spacer primary function is to increase crankcase volume past the reeds. Fools the motor into thinking crank displacement is more cc's and thereby more area and air and thereby more vacuum and low end.

Thanks Joe for clearing that up.