One of the advantages of having a good tuner do work on your stuff is benefitting from his expertise.
That said, each tuner has his own 'flavor' of things.
THAT said, I'm a bit surprised of a .40 rec for a 155# rider. It would be curious if, not
having .38s, a rec was made for .40s. That obviously wouldn't be right.
Here's some alarming news for 'ya!
I just ran: dirt, kdx200, 155#, enduro thru the mx-tech spring rate generator on their website. It returned as choice for fork spring:
Your recommended shock spring rate is....0kg/mm
Your recommended fork spring rate is....0kg/mm
And the list that follows that of what's available indeed shows .40 springs as the lowest available for the 36mm kyb fork.
I'd be making some calls pretty quick.
No, I'm not a tuner. Still,
my flavor would be: .38s would probably be better than .40s for you.
wink-wink..there are .38 530mm long springs available from honda for your bike! They are for a 1996-99 XR400. Have 'em setup with 3mm preload. Oil level at 120mm.
A suggestion for your monday conversation................
If you have ANY question whatsoever, get ahold of jeremy. He may be interested in a .40 spring rec for a 155# rider.
But then, maybe you told him (and maybe you are) you're going to run this thing on the track. I'm assuming you will use it for its intended purpose....a woods bike. If you fashion yourself as some kind'a jumper or something, a heavier spring
IS called for.