Joined: 07 Aug 2006 Posts: 166 Location: newcastle
on these engine i think runiing in is a load of shit
after all there race engines ,,
yeah dont hold them flat out at max revs for extended periods and
yeah use the whole rev range but dont be so concerned about oils and procedures
its not like your planing on doing hundreds of thousands of kms
heat cycling is good but dont stress about it in any paterns the way the sports is run and the fact your fuel
runs out after 10 or so laps is enough to drag u off the bike
most race engines either go straight on the track or for a heavy dyno session
personaly i beleave in the run it in like your going to ride it
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Mon Jun 23, 2008 8:38 pm
PeteD Front Runner
Joined: 19 Nov 2007 Posts: 229
extract from
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Breaking in
Your engine's first steps are very important; if you don't break in right you could seize your motor in a hurry, and you greatly reduce your engines life. The most common method of breaking in is through "heat-cycling" the engine. Heat-cycling is running the engine at idle, or just above idle, for about 5-10 minutes. This gets the engine to a little lower than operating temperature. After running the engine for around 10 minutes you need to turn off the engine and let it cool completely. After the engine has cooled, you should repeat the above steps 3-4 more times. After you have completed the heat-cycling, you should run the bike easy, avoiding high RPM, and avoiding stress on the engine. You want to continue to run the bike easy for about 1 full tank of gas. After you have completed this you are just about done.
The other method of break in is quite simple, it's called "racing break in". Allow the engine to warm up for five minutes. After the bike as warmed up, hit the track. Do one lap to warm up your tires, then hit the gas. Take a normal 10-15 minute session. The varying RPMs and combination of acceleration and deceleration of riding on the track will break in the engine. This method is less common, but when done correctly has shown no ill effects the the engine. Just make sure the engine has warmed and you should be all set.
Many people will tell you that you should run more oil during break in; it's usually not the best idea since adding more oil will lean your fuel/air mixture, and that can cause your engine to run hotter than normal; using the normal 50:1 gas:oil ratio is best at all times. But during break in it is best to use non-synthetic oil, as full or semi-synthetic oils can cause the piston ring to not seat fully because they are too slippery. So it is recommended to use regular, non-synthetic oil for break in and full or semi-synthetic oil thereafter.
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I used the racing break-in option on mine, much easier In fact, there are arguments out there to say that the harder you run your engine duing break-in, the more performance you will get out of teh engine. Have a look at this site
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