I should put the 455 oiler on mine. The stock one is pathetic and I use 10-40 motor oil in order to keep the chain oiled.
Yeah, I did a long thread over on AS on modding the 450. Mine is now a 'pocket rocket', the weight of a 45cc (11.8lbs) saw that thinks it is 60cc. I ran it against a couple of 036s with 3/8 chisel chain (I use semi on the NK chain) and it was like running a race saw against a couple of stock saws. The guys were a bit crappy about it and complained that I cheated with the NK chain.
Modding the 450 takes a LOT of work. The biggest problem is that it is based on a 45cc engine and the transfer ports are already too small by 9%. I then made the transfer port opening 12.5% wider, which then compounded the too small transfer tunnels.
I had to grind the back out of the transfer covers and re-build the backs with fiberglass and GB Weld. Take 9% add 12.5% and you can see I was already 21.5% too small. It took a lot of work (measuring, grinding, measuring, etc.) to get the transfers to flow the way I wanted them.
I also matched the strato and intake timing. The stock strato timing is 10 degrees longer than the intake. I just increased the intake to open with the strato. The piston needs a bit of work to increase the strato flow.
I then removed the stock 11mm carb and put on a 13.5mm carb off of a 570. The choke rotated the opposite way, so I had to grind out the old one and build up a new stop. I dropped the pre-load on the metering spring to bring in the fuel a bit faster with the larger carb - it works like a light switch.
With all the increase in flow, the stock filter is a restriction and I had to go to a nylon mesh filter. Even that can begin to clog up on a cutting session (just wash it out with fuel - good to go).
I also widened the exhaust port to 65% of bore and raised it 2 degrees. I also used the trick of filing the top of the piston to the curve of the exhaust port to get an equivalent extra 2 degrees of blowdown while maintaining the trapping efficiency and compression of just raising the port 2 degrees.
I used the bolt tubes on the muffler as part of my muffler mod. It is a little quieter that way, but not by much as the entire exhaust port opens at once and there is a fairly sharp exhaust note as a result.
As you can appreciate, it was a lot of work, but the saw will be the last one I sell.