ENGINE:

YAMAHA:

439cc, 4-Stroke Single, Liquid Cooled w/ Fan, Titanium 5-Valve DOHC
Bore x Stroke 95mm x 62mm
Compression Ratio 11.9:1
Carburetion Keihin 39mm FCR w/ Throttle Position Sensor
Ignition DC - CDI

HONDA:

450cc liquid-cooled single-cylinder four-stroke
Bore and Stroke 94.0mm x 64.8mm
Compression Ratio 10.5:1
Valve Train Unicam; four-valve
Carburetion Keihin 42.0mm with throttle position sensor (TPS)
Ignition CD with electronic advance



who will be the winner here? And who will be the winner after the HRC performance kit and the GYT-R silencer, rejet and opened airbox? I have no idea. we'll have to wait to see this one.

CHASSIS:



HONDA:

here's the big surprise to those of you who read what ATVaddiction said.

THE TRX450R CHASSIS IS NOT A STOCK 400EX CHASSIS. it is slightly lower, wider, with a longer wheelbase.

DIMENSIONS

Length 72.6 inches
Width 46.3 inches
Height 43.6 inches
Wheelbase 49.2 inches
Seat Height 32.6 inches
Ground Clearance 4.2 inches
Dry Weight 350.0 pounds
Fuel Capacity 3.2 gallons
Front Suspension Independent double-wishbone with Showa shocks, featuring adjustable spring preload, rebound and compression damping; 8.4-inch travel
Rear Suspension Pro-Link with single Showa shock featuring adjustable spring preload, rebound and compression damping; 9.0-inch travel



YAMAHA:

L x W x H 72.4” x 46.1” x 42.9”
Seat Height 31.5”
Wheelbase 50.4”
Ground Clearance 4.4”
Fuel Capacity 2.6 Gallons
Dry Weight 350 Lbs.
Suspension/Front Independent Double Wishbone, 9.1” w/ Rebound, Compression and Threaded Preload Adjustment
Suspension/Rear Aluminum Swing Arm, 10.1” w/ Rebound, Compression and Threaded Preload Adjustment


I think for TT and maybe MX Yamaha will have the advantage. but for competing in Baja and XC, the TRX will be the ride of choice. of course, we don't have the CoG of both machines but with a full tank of gas, all fluids... I'll put my money on Yamaha.

 

I would pick the Yamaha for MX or freestyle jumping. (We had the YFZ out jumping in the dunes a couple of weeks ago, and it was a blast!!)

The Honda is essentially a 250R with a 4-stroke motor. I pick it for everything else.

 

Honda: GNCC, Baja
Yamaha:MX, TT

 

after seeing the specs and waiting through the big hype im dissapointed in what honda has brought us. Its nothing special compared to whats on the market already. The sad part is that it is something special compared to honda's current lineup.

 

looks like the Hondas has a weight advantage, bigger carb, and a competitve price to the YFZ. whether one will better for the other is completely opinion as none of us really have one to modify. the yfz does look more MX orientated, stock, but i dont know anyone that rides stock. should make for some awesome racing. id like to own them both, personally.

 

how can both having a dry weight of 350 give honda a weight advantage? Also you forgot to mention its a unicam compared to the titanium valve dohc yfz450.

why is honda's the same weight as the yfz even though it has a kickstart?

 

Knowing Honda its probably super reliable, That is the single biggest advantage in my book. Guess we wont know for a few months to see if thats true.

 

simple, rounded numbers. alluminum subframe, lack of battery and starter motor, and head weight (single cam). none the less 15lbs (not saying that is how much less) is a lot when we talk about performance, but it is easy and common for a manufacturer to just round up. same with the 439cc YFZ450 or 246cc 250R....it goes on and on. who hasnt seen inflated HP numbers for that matter? im just speculating and not being negative towards either. you want to drain fluids and weight them and expect to hit exactly 350lbs you are sadly mistaken.

 

i see your point. Rounding the cc up or the hp numbers up makes sense. But rounding the weight up is ridiculous. You dont have to have a marketing degree to see this. If honda's bike was 15 pounds lighter i will almost guarantee you that they would have written 335 instead of 350 in the specs.

also the yfz has quit a bit of aluminum on it also so again your not proving anything to me. Please correct me and show me how the honda has a weight advantage.

 

alluminum subframe, lack of battery and starter motor and cooling fan (didnt see one on the R), and head weight.

i wont say it again.

and from Honda's marketing standpoint, reliability is their ploy in all their products FIRST! weight, hp and engine size are all relative and little seperates them from the fact why they would inflate one and not the other. HP sells products before minor weight difference in the competition. as i said before, the Honda looks to have a weight advantage even if it isnt as much as you'd like to see. the added stroke should provide a little extra torque, but the Yami's 11.9:1 should take care of that, so i stated no power differences even though i know their is one and its most likely the yami. maybe im the only one willing to post this, but i think it will be a worthy opponent of the YFZ.