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View Full Version : TRUE DYNO RESULTS FOR THE YFZ and 450R



opiate101
02-15-2004, 08:04 PM
I posted this on the 450R section, but te YFZ guys may want to read this too.
to all interested, I am friends with ACS racing (www.acsracing.com) and they have a quad dyno. A few days ago (2/10/04) another friend picked up his new trx 450R. We ran it on the dyno, and it made 32.7 HP to the rear wheels, period.... No bullsh*t numbers like evryone is posting all over the net. And the YFZ 450 (I have 2 of them) both made the same numbers (1 made 32.7, other made 31.9) THe curves are almost identical, the honda comes on earlier, and sighs off earlier, but they are very close. As for the Banshee......ACS owns 2 of them an 03, and an 04. the 03 made 35.8 HP bone stock, 04 made 35.7. With just a set of FMF SST pipes and jetted, they made 43 HP (03 42.9, 04 43.2). These are real numbers, I will scan the dyno printouts if you want. Oh and retard the exhaust cam one tooth, put an FMF powerbomb/Titanium Muffler and jets (178 main, 45 pilot) and expect 48HP to the ground on a YFZ (that's what mine makes)With the HRC kit from Honda, the 450R made just under 38 HP to the wheels. A full exhaust should put it close to 50 (between 47-50). But we'll have to wait until the pipe comes in. Oh, and over the summer we dynoed a 416EX, not sure of what parts were in it, but the typical things everyone does to the 400ex, and it made 33 hp when it came to the shop, after jetting it, and adjusting the carb on the dyno we got it to just under 36 hp to the wheels.

Baley69
02-16-2004, 06:49 PM
What type of airbox setup did you have on your yfz?

Andrew400ex
02-16-2004, 11:50 PM
throw a cannondale into the mix:blah:

opiate101
02-17-2004, 09:28 AM
The air box is stock, with the lid off. Andrew400EX, bring that Cannondale down, I'd love to run one on the Dyno.