Went to the dune's last weekend, and got my chance to drag race some new YFZ, and & TRX-450's. Man those 4 strokes sure run good. But I have to say , I will never get rid of my 89 TRX. With some port work & little tricks learned over the years, my .010 over 250 can still out run piped 450's. I have rode the 450's & they are sweet, but I get back on the old girl & I want to buy a 450 engine & bolt it on. The old 250's feel so much lower & more stable, and they don't wheelie as bad out of the gate. Honda sure hit the nail rite on the head with the old TRX.