The stock VTR1000 engine is no Hayabusa or R1 powerplant, yet it provides a very wide tractable powerband, with no real discernable jumps in power from idle to redline. My VTR Dyno'd at 104hp and 67 ft lbs of torque with only the D&D slip-ons and no jetting changes. I've made some changes to the stock engine though after finding a deal I couldn't pass up, on slightly used Erion Racing camshafts (600miles of use) and brand new J&E 11.5:1 compression ratio pistons. For $150 I got all of the above and adjustable advance/retard camshaft sprockets that I did not install. The install of the pistons according to the Honda Factory service manual requires the engine to be removed from the frame, but it can be accomplished without engine removal. I recommend you not undertake doing this yourself unless you are very mechanically inclined and own a good selection of torque wrenches (as different sizes may be needed to get through the bottom of the crankcase to the rod bolts. The Honda service manual also states that the rod bolts must not be reused, well being the cheap kinda guy that I am, I reused mine and have had no problems even after 5,000 miles, a former VTR racer (Briggs Willoughby) also has had no problems.

*DISCLAIMER * DO THIS AT YOUR OWN RISK! I ASSUME NO RESPONSIBILITY FOR ANY DAMAGES THAT MAY ARISE FROM ANY PERSON DOING ANYTHING DESCRIBED ON THIS WEBSITE!

If you decide to replace your camshafts with an aftermarket equivalent don't forget that your valves will most likely be out of adjustment and require new shims. Most dealers do not stock these and you will most likely have to order them at about $8.00 a piece.

With the particular cams I have I had to modify the camshaft holders on the intake side, I used a Dremel rotary tool with an aluminum oxide stone as shown in the pictures below.

I was unfortunately unable to get a hold of the same dyno operator that my initial dyno run was made on, and dyno's don't seem to be very numerous here in Germany. As soon as I find a reasonably close dyno I will get my bike redyno'd and since my scanner died it may be a little while until I get both (before and after) runs posted up.