TRX450R
  Below are 3 links to comparison runs made on the dyno comparing the TRX450R to the YFZ450. Both bikes were stock, both bikes had about the same amount of breakin time, both bikes were dynoed under the same conditions including 30MPH air blowing across the bike. Interesting thing with the Honda was the ignition was going into a double spark condition at 8400 rpm. The Honda was hitting the rev limiter at 9200 rpm, however on the runs below you will see the graph for the honda stop at 8400 rpm on all the runs that are based on rpm. You can see the full spread on the run that is speed based. In all the graphs - the blue is the YFZ and the red is the TRX.
HP vs. RPM
Torque vs. RPM
HP vs. Speed
This is a new rear suspension link for the TRX 450R. It has been designed to not only lower your bike but also to give you an additional 1.5 inches of wheel travel. This one is setup to place your wheel travel in the correct location for 18 inch tires (MX) with the stock rear shock. It is also a good combination for 20 inch tires if you are still running the stock front shocks. You will need to cutout your skid plate to make room for it. With this link I will also supply the shock setup, spring and valve data to go with an Axis shock. The package price including revalving your stock shock, a new link and new bearings in the link is $250.00.
This link maintains the stock wheel travel but lowers the bike correctly for XC racing using 20 inch tires and aftermarket front shocks. With this link you will need to raise your air box 1/4 inch to maintain proper clearance. With no change in spring preload, this link will lower your rear end 2 inches. I also use this link when setting up a TT bike. Again, you will need to cutout your skid plate to make room for this link. Package price again is $250.00.


  The front shocks that Honda installed on this bike are good shocks, however they do have room for improvement. There are several issues that need to be addressed.

1. Spring rate – With the single rate spring that came on it stock, you do not have as much sag adjustment as what some are wanting. I have tested several setups and have found that the least expensive solution is to have a progressive spring made to fit the stock shock that lets you lower the front of your bike while still maintaining good bottoming resistance.

2. Compressed length – The compressed length of these shocks is too long to run a good sag setup. If you run a good sag setup, the shocks will bottom very easily while the frame is still several inches off the ground. We now have tooling in house to modify several shock componants to let us shorten the compressed length and gain 7/8 inch shaft travel, giving us more options with this shock then previously thought possible.


New progressive wound springs - $150.00
Revalve and modify front shocks - $250.00


  The rear shock has similar issues. For this I have a new rear link and then revalve the shock to match it.

New rear link with bearings - $175.00
Revalve rear shock - $75.00

More On the TRX450R suspension
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