Well, since my dad has the honda and I have the Yamy, people are always asking me which is better; YFZ or TRX? Well I have some news for you, it depends. Bone stock, YFZ is a top end bike with lots of speed in the top gears. The TRX is very torquey and will beat you off the line every time ( with the right rider). Our bikes are modded though. Both bikes are piped, jetted, and have K&N filters. Both bikes have been lowered a tooth on the countershaft for bottom end in the sand. The difference, I have  20" 8 paddle skat-track haulers and he has sand stars. And he installed the HRC kit( CRF cam). We raced on a flat stretch of wet sand and every time, the trx pulls ahead off the start, and by the end, my YFZ catches up with the top end power and we baisicly tied every race. I'd say these bikes are very even all together.  

i have a 05 yfz 450 with fmf titanium 4 and k&n intake and less teeth on my sprocket and i have to buddys that have the trx one is stock and i smoke that thing..the other one has the pro circut titanium 4 and the honda racing kit on it and i raced it and my front wheels were off the ground the whole time nad his were on the ground and we were neck and neck till the end when my front came back down and i smoked it ..but yes i do agree that they are pretty even..the ltr is another story..those things RIIPP  

Yeah I was the same way racing him. He beat me only because i couldn't keep the front end down for the life of me. When I was down, I would catch him so fast in the top end.