125-200cc RB Designs head modifications for CR/WR125

I had mine done since RB is only 2 miles from my house. It was worth the $45.

There is not a huge gain as the Husky is not put together sloppy like a KTM or Gasgas. Rob told me the Husky was much closer in stock form then the other euro bikes. My squish was 1.2mm and he set it at 1mm which is ideal. The .3mm base gasket option would also get you the same squish.

There were two advantages to the mod. One the bike is a little easier to jet with a proper squish band. Also there was a boost in midrange power but it was not a huge gain.

What is a squish band and what do they do to make it batter?

CrankN
They adjust the clearance, angle, width, chamber shape, volume...
Search on terms like "squish, msv, boundary layer, Alexander Graham Bell"

Some google results:
Squish by Dale Alexander
3cyl.com

just got the RB head mod for my 2004 WR250 my squish was about1.55 and he bought it down to 1.1. After rejetting slightly leaner across the board (ran a little rich with the modded head) the bike rides so crisp and the bottom end tourque was increased quite a bit and some mid range and a small amount of top end increase as well. this combined with the lowerd power valve and 1.3 mm power valve spring preload shim and lectron carb I finally got the super linear power I was looking for! the power band is so smooth it feels as linear as a well tuned 250f but wih more power everywhere you literally can't feel the power band kick in it is so smooth. I did this as a winter project because I came off 4 strokes and couldn't stand the on off power of the power band of the 2 stroke. now it feels like no other 2 stroke I have ever ridden and was totally worth it and there is no $1200 top end to replace every 120 hours!