You're reading this on the internet, so remember that before you take any drastic action on your new bike.
What do you engine experts out there think of this engine break in theory? I did a less aggressive break-in than this one, running up to red-line a lot less frequently than mentioned below. I think I did a WOT run, in first gear, once or twice, in Second gear once or twice, and only once in third. But the bike dyno'd higher than any of the other TLS that were dyno'd by the same shop.

But what does the Hawk collective think?


You can follow the directions in your owner's manual, or you can read the following and form your own opinion. Many of us subscribe to the belief that the owner's manual method just doesn't do the job...

"The best way to "break-in" any new piston engine is to NOT "baby it" by keeping the RPM under some manufacturer's "magical limit". Have you ever heard the line "if you don't break it in hard, it will never run hard?" Well, there IS quite a bit of merit to this statement once all the reasons are fully understood.

I'm sure that we can all agree that THE ONLY WAY any piston engine "breaks in" is by "wearing off" and "polishing" any and all the "high spots" to make a perfect, custom, low friction fit between all the important parts. Time alone at reduced RPM WILL NOT ACCOMPLISH THIS! It takes MAX RPM for all the parts to make contact that would NOT normally contact and "wear-in" at some reduced RPM level. The best method for this to occur is to run the engine right up to the manufacturers listed "red line", BUT with the LEAST LOAD POSSIBLE (remember load = heat and NEW pistons DO NOT like excessive heat!).

How do you do this? Well, with any vehicle that has a gearbox, it's real easy. When the bike/vehicle is brand new, you begin a series of "low load", HIGH RPM runs (right up to red line), but ONLY in FIRST GEAR. This gives the VERY necessary "high RPM wear-in" for the pistons and max "gas pressure" on the rings to press them into the cylinder wall so they can seat WITHOUT high load/heat. This first gear high RPM blast will only last a second or so max. DO NOT be tempted to run through all the gears on a new bike - WAY TOO MUCH LOAD = HEAT! In fact, it's well known that if you DO hold WOT on your new bike in top gear, the piston-to-wall clearance can actually approach a PRESS FIT!!! As the mileage rolls up on your bike/vehicle, you can create higher load by simply going UP into the next gear and grab WOT, to your max RPM "redline". What I normally suggest is that you perform a "WOT first gear blast" about every 20 miles or so until you reach 100 to 150 miles. "Second gear WOT blasts" will obviously take longer (about 2 seconds) because of the taller gear and more load and should be performed at about the same intervals as the "first gear runs" and continued until around 500 miles. Continuing with the above WOT and "next highest gear" scenario is pretty much up to the individual and is not completely written in stone as to how fast to progress through all the gears, but completion of all 5 or 6 "WOT gear runs" should be within 1500 to 2000 miles (very subjective here).

An occasional COMPLETE COOLING OFF about every 100 miles or so is very important to help "heat cycle" and "season" the various high temp engine components. If you want to know the WORST WAY to break in an engine, just follow the manufacturers suggestions "TO THE LETTER" by keeping your engine under some "magical RPM limit" and continue to upshift all the way into 5th or 6th to prevent exceeding this "contrived RPM limit" while adding a little more throttle to keep up the pace with traffic (or your buddies!). You can easily see that you will eventually begin to "lug" the engine which is ABSOLUTELY THE WORST THING you could do to your new ride. With this scenario, you will quickly get into that "operational press fit" situation I described above - possibly damaging your engine. So - LET IT REV!!! (within the above guide lines of course)."