I called the Canadian Mx-Tech shop Cycle Improvements that does our suspension regading my son,s 03/125sx.
While on the phone I asked James Hunt about sub-tank technology. He said they were getting some in and would like to get some out for feedback and would set me up with a good deal, the bait was out and the hook was set.
I sent my 520sx caps off and had them installed upon return I raised my oil height to 80mm and set the sub tank adjusters to the middle.
Have you ever gone out on an enduro bike or a bike that has been set up for a really light rider and the suspension is so plush and it feels great until you push it. That is what it feels like with the sub-tanks EXCEPT when you push it, it returns back to great MX suspension!
There was no deflecting off stuff,no dancing or skipping on rutted, choppy hard pack corners. On nice bermed corners it sets and settles in great. Jumping and CASING (if it,s there I will jump it or crash trying) works really great plush and cushy no slamming. I have way more confidence in the front end, than I have had on any other bike.
I did take a couple of turns of rebound out of the forks and am going to change oil height to 70mm. Then start playing with the sub-tank adjusters.
I haven,t had any issues with shock with the addition of the sub-tanks to the forks. But with how well it settles in to corner now I am thinking just a little more sag will make it even better.