This question is long overdue!
Y should someone purchase a used track bike?
Has is the motor gone through its proper manufacturers proper break in period , it the bike goes straight from the showroom to the track???
Can anyone answer this !
There is no need for doing the full factory break-in procedure. There is a school of thought that following the factory break-in procedure may result in an engine that does not seat the rings as well as an engine that is broken in hard. There is another school of thought that the factory break-in procedure is as much to break in the rider (get the rider used to the bike).
You need high pressure in the cylinders to push the cylinder rings out against the cylinder walls to seat them. But this has to be only for short periods initially to prevent having too much heat build-up. The majority of piston ring sealing happens within the first few minutes of engine operation.
I've only done the running-in procedure on rebuilds, not on OEM builds. There is another argument that the factory machining these days is so good that no break-in period is required at all.
For rebuilds, this is what I've done ...
Initial engine fill is with a regular, cheap, 10w30 non-synthetic motor oil. There is an argument that if you install new camshafts and lifters that you should use a break-in oil with higher ZDDP content ... I've never done it, but if you subscribe to that theory, such oils are available at automotive hot-rodding places (Performance Improvements, etc).
On first start-up, just run it at idle for 30 seconds or so. Confirm that the oil pump is working (verify that the oil level goes down in the window) and check for leaks and verify no nasty noises. Shut it down and give it a few minutes to cool off.
Second start-up, hold it at 2000-ish rpm for a couple of minutes. Check that the alternator is charging, verify no leaks or nasty noises, etc. Shut it down and let it cool off.
Third start-up, vary speed 2000 - 3000 rpm no load (in neutral) until the coolant temperature gauge reaches the normal range. Shut it down. The next run will be on the track.
At the track ... Start the engine and warm it up at 2000 - 3000 rpm until the coolant temp shows normal then go out on the track. Accelerate hard at full throttle but upshift early to keep the revs around half of redline and when it reaches that rpm in top gear, back out of the throttle and cruise. On the next lap, add 1000 rpm. On the next lap, add another 1000. By the end of the session you should be accelerating at full throttle to redline (riding normally).
Pull in and change the oil. It will probably be pretty black considering how little it has been used ... that's the break-in doing its job. I'll use a good motorcycle-specific non-synthetic for the first fill and then just ride it normally. At the next oil change, the engine is now broken in, use synthetic oil.
