Just rejetted

If it's a little lean, you might cure it by moving the needle clip down. My experience has taught me to never go below the middle clip. For some reason (regardless of the jet size) the bike bogs on take off if the needle clip is too low.

Either way, congratulations and have fun getting it "dialed in"

JCW

amazing----ain't it!

Stock on a 200 is 160

150 may be a bit lean, but how do you know. Does it hesitate? Have you correctly done a plug chop?

Coming from a descent mechanical background I thought hop-ups would require a richer set-up too, but thats not the case with this bike. (I have nearly the same set-up as you).

Jet it to feel and operate well, and forget about the numbers.

What size pilot is in it? Is the needle stock?

re: 'how do you...'
The question raises concerns.

1. Loosen the carb boot clamps so you can rotate the carb for access.
2. Take the top off the carb.
3. Remove the slide.
4. Unhook the throttle cable (note the tang on the nylon spring retainer that must fit back into the slot on the needle holder nut.!!)
5. Remove the throttle nut. Use a socket of the correct size (6mm I think). Use of pliers will likely crush the nut..and then your not going anywhere until you get a new one.
6. Remove the needle, change the clip to the desired position.

Watch your use of the clip!! The can go s-p-r-o-i-n-g very easily, and you may not find it! A one-each clip from the corner hardware store will not fit.

For the profane of mind...they call these things 'jesus clips' for a reason. You try to put one on...it goes flying, you say 'JeSUS!' But....you don't talk like that, 'eh? Good!

Clip positions are numbered 1-5 (or 6 depending on your needle) from top to bottom of the needle...as in from the blunt end to the sharp end. RAISING the clip LOWERS the needle resulting in a leaner setting in the 1/8 to 3/4 throttle range.

Use caution when wrenching on the needle nut. If you're ham-fisted you can bend or even break the needle whilst trying to hang on to the slide while you're twisting.

Reassemble the slide/nut with neverseize. That will keep them from sticking next time.

Reattach the throttle spring (a hemostat helps..pic @ CDave's site)

Use caution during reassembly. Put no pressure on the slide/needle when you put it back in the carb. Make sure the needle enters the main jet on the way down.

Don't crossthread the carb cap back on. Easy to do. Harder to do (a good thing), if the threads are nice and clean. Maybe a spit of liquid wrench or wd40 on 'em.

Oh...is this the time to say...start with a clean carb!!! ;)

You do not want any dirt inside to hang up the slide!!