57ringo I had a 2001 350 TRX that did the same thing.
When I got my 04 rincon I noticed that it has the same problem.
I don't think that there is much that can be done about it.But I
can tell you what I do,and that is that I have an 18" piece of leather
string that is attached to my keyring, and on the other end is a slip
knot(noose),that I slip over the choke knob while riding.
When I start the bike I pull out the choke, and with slack string I
wrap it two or three times around the thumb throttle. After about
five minutes I take it off and, away I go.
I have never heard of this? None of my hondas have done this. I have had a trx300, 450, 500, and 650. Also had a 250XR dirtbike. I dont think that is normal as the steelership stated. Maybe Rob or someone on here has the knoledge to fix it. Unfortonatly I dont but i know that it isnt normal.
Yellow is correct, you need to tighten up the knurled collar and the base of the choke handle, you can do this by hand. Just peel back the rubber and spring retainer and the knurled part is right there..