I got done putting the 400ex shocks and a-arms on the 300ex by relocating the shock tower and then moved towards putting the 400ex swingarm,axle,into this 300ex,and I must say it is a very stable machine with width and length now.I took riding for the weekend and my buddy just loved the way it felt,we had spare parts laying aroundand decided to try it out,I had to use a 250r rear shock with 400ex linkage to make it work,but amazing what you can do with a torch and mig welder.

2-2000 TRX400EX
1-1998 TRX300EX