03 CR125...already shaking my head

Remove tree for better visibility??

Ride it for a while and pick out what you don't like and think you could change...
Only mods-pretty much what you've said unless you consider the carb swap/reeds/new topend ( guaranteed to be stuffed ) head mods...

Suspension-check linkage for wear, replace and worn out parts. Set sag and if the forks/shock aren't leaking ride it and log clicker adjustments. Find your settings and then get what you don't like... If leaking I suggest getting the suspension serviced ( if you're that into your bikes ), I suggest servicing anyways but give it time in case you want valving mods done.....

That should get you started

*edit* I see you removed the tree!!

I think the 05-05 airboot (and airbox?) were a nice upgrade for your bike.

There is a lot you can do to the cr but it won't beable to compare to your yz motor.

I have an '02 and had to play quite a bit with the jetting to get it to rev clean. I had to lean out the pilot and the main and still had quite a stutter before hitting the band. I dropped the need one clip and WA LA. Take into account that I'm at low elevation in central California. The bike runs super clean bottom to top. It used to be that pinned was the only way you could ride it (which is how a 125 should raced of course) but it just was tough otherwise. I saw an '03 at the track a few weeks back and it had that same mid range stutter.
I have an FMF Fatty pipe and PC shorty silencer and Boysen RAD valve. I put an oversized front rotor and then stuff to make it look good including the '10 front fender and number plate.
Of course that's the outside. I completely rebuilt the motor last year top to bottom including some of the tranny. I've also rebuilt the water pump and carb, but still need to go back in and adjust the float. Always something with a 2-smoker.

x2 on the 2005-on airboot. It will bolt right up.

I had an 01 CR125

I did the

05 airboot
Drilled out the side panels for air flow
Rad Valve
PV mod
02 Power Valve flaps
PC pipe and silencer.
decked the head
Ported it
Put a PWK on it

then I bought a bone stock 05 YZ125 and it walked away from the CR. I traded it for a KDX lol

The best part about them is the way the handle, they turn on a dime. I still have the PWK if you are interested. Good luck

forks would be easy, from what i understand there are differences with the shock mountin though

I'm interested in the pwk! Email me Alexanderlindahl91 @ Gmaildotcom

Im currently changing to newer fork's on my 2001 cr.

Fork fits the clamp, you need a new style caliper and axle, and from my memory the left/disc side distance need to be swapped, have not found a solution there yet, but if I remember correctly, the oem one is 7mm too long. There is probably an oem distance that fits..

I tried sending you an email but that address isn't working. Here is a link for the carb anyways.

http://www.ebay.com/itm/282006416104?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649

*high five sounds fun.. let us know on the 134