August 12th, 2018, 04:45 AM | #1 |
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Name: Micah
Location: Lititz, PA
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What’s my break in period for a new piston?
My 2001 ninja 250 was running too lean on one cylinder and one of the pistons had a hole in it so we replaced it. One new piston and rings. How many miles should I be babying my engine? Everything is old but the new piston and ring set.
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August 12th, 2018, 09:48 AM | #2 | |
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How do you pronounce the town you live in, LI TITZ? I have family in that area (Highspire, Middletown) but have never heard of Li Titz! I hear it's the 'Coolest Small Town in America'. I was wondering what makes it so "Cool"? Could it be the Li Titz or is there another reason that is not so apparent?
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August 12th, 2018, 10:18 AM | #3 | |
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Quote:
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August 12th, 2018, 03:03 PM | #4 |
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Did you have cylinders honed and cross-hatched?
Did you put in single-weight break-in oil? |
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August 12th, 2018, 04:17 PM | #5 |
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August 12th, 2018, 05:29 PM | #6 |
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August 12th, 2018, 05:52 PM | #7 |
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Name: Micah
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August 12th, 2018, 06:42 PM | #8 |
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Mechanics I know have recommended conventional oil for the break in period.
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August 13th, 2018, 10:11 AM | #9 |
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Break-in is more for seating the rings than anything to do with the actual piston. To seat the rings you want cylinder pressure. That means load. Moderate loads with a variation in RPMs is usually recommended, as is some heat-cycling.
I've been told by a high-end (Porsche, Ferrari, Nascar and NHRA experience) engine builder that extended break-in time isn't needed if the machine-work has been done properly. He said oil isn't critical (synthetic isn't any more "slippery" than conventional oil as long as it has the correct additive package - no "Friction Modifiers"), but he likes to change it fairly quickly after the engine has been run a while (complete rebuild, after running maybe an hour). So just run an inexpensive conventional oil that's motorcycle compatible like Rotella T. Don't run any automotive oil in a cycle engine. That's pretty much in-line with what I thought, but there are many opinions on the subject. |
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