Originally Posted by Gordy
I love my '09 300! Still!!!
I have done a few things to it that helped.
JD jetting kit
Extra rear wheel with a trials tire mounted for easy swaps from knobs>trials
2 teeth up on the rear
Mapping switch on the bars
Recluse Core EXP
Clear tank (3.1?)
Maybe a few other things that I can't remember, like shark fins and stuff.
This bike will rip in the desert and climb technical stuff all day.
I really can't think of anything else that will do what all the 300 will.
This bike is known for it's stump pulling torque and ability to chug without stalling.
If your bike is not pulling like a train at low revs, it is probably jetting and not the PV setting.
Try setting the PV back to stock and work on the jetting before you go all crazy with the spings and pre-load.
The maintenance is practically non-existant. I have around 200 hours on mine and have changed the plug once. Still on the stock piston and it has plenty of compression and makes no noise, so I'm not worried about that either.
The idea of swapping in a 6 sp has my interest and may do that next year.
You might want to start thinking about a fresh piston for peace of mind. KTM has a slightly oversize piston that folks typically put in on the first rebuild.
Another good upgrade on older 300's: VForce reeds. I believe that KTM puts these in new 2-strokes now. Older models have the reeds superceded with VForce.
Inspect reeds regularly and replace pedals whenever you are doing the top end.
The DR is now off the bike bench. The 300 gets torn down this weekend. 350 hours. Time for a new piston, replace the Rekluse throw out bearing & thrust plate, new reeds.