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Old 07-07-2009, 08:31 PM   #21
ChrisGo
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There is a lot more to breaking in an engine than seating the rings. Every mechanical piece in the engine that comes into contact with another needs time to mate.
For example: The contact surfaces that seem flat actually aren't, but are flat to an extent (tolerance). These pieces need time to wear so that their mating surface becomes flat. This process is why you find all those metal shavings on the plug after only a few hundred miles.
Bearings and their journals, rings and cylinders, lifters and camshafts, etc all go through this process.

Go ahead and dog on your engine like all the keyboards warriors say to, those dumb engineers that wrote the break in process are idiots
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Old 07-07-2009, 08:31 PM   #22
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Quote:
Originally Posted by 90 5.0 View Post
many of the early breakin reasons were for the flat tappet cams and high tension rings, as mentioned earlier metallurgy has changed a ton as well.
This is true as well, to an extent
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Old 07-07-2009, 08:43 PM   #23
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I don't know alot about FI bikes, but I know on fuel injected cars, the ECU/PCM of a car actually has a learning curve to the A/F ratio pre-programmed. IE: Pull the battery out of a car, and put it right back on. It will run like for a short period until the computer can re-adjust. Less noticeable on a completely stock vehicle though.

Could the FI be one of the reasons for break in?
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Old 07-07-2009, 08:44 PM   #24
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Old 07-07-2009, 09:21 PM   #25
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Moderate to full power fairly quickly. Glaze forms quick if rings to get seated.

Modern engines are either built correctly or not. If not then mild break in just means it'll fail further down the road.
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Old 07-07-2009, 09:24 PM   #26
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Quote:
Originally Posted by cedestech View Post
Moderate to full power fairly quickly. Glaze forms quick if rings to get seated.

Modern engines are either built correctly or not. If not then mild break in just means it'll fail further down the road.
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