Twin Cam Motors Twin Cam 1998 thru 2017

95 inch big bore break in

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Old Feb 17, 2024 | 08:04 PM
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Default 95 inch big bore break in

Hello guys. What is the recommended breaking for a 95 inch bb? 500 miles under 3000 rpm change the oil and ride as usual?
 
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Old Feb 17, 2024 | 08:52 PM
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Depends on how close the tune is..
 
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Old Feb 18, 2024 | 10:52 AM
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Also depends on the cylinders. Originals bored out or new. New cylinders have to be be heat cycled.
 
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Old Feb 18, 2024 | 10:54 AM
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I do heat cycles. Start it up let it get warm for a few minutes. Shut it down. First 50 miles under 60 mph. Vary throttle. Give it some gas, but not full throttle.
 
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Old Feb 18, 2024 | 11:57 AM
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Default 95 inch big bore break in

This is my build. 95 in screaming eagle cast Pistons. 510 s&s cam, Vance & Hines pipe, mikuni 42, fueling lifters. Big boys streetport valve job, stock cylinders board to 95 in with torque plates. I have 455 MI on the amsoil 2050 that was in the bike before the build. Should I change the oil in 500 miles. Should I put fresh oil in now and then change it again in 500 miles. Am I safe running with the amsoil that already has 455 miles on it? It's been raining here in Florida for two days straight. I plan on having 500 Miles within a week on the bike.
 
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Old Feb 18, 2024 | 12:05 PM
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Default 95 in big bore break in

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Last edited by 02fx; Feb 18, 2024 at 12:07 PM.
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Old Feb 18, 2024 | 12:11 PM
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Normally I put some cheap dino oil in it, then change around 500 miles.
 
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Old Feb 18, 2024 | 12:54 PM
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Default 95 inch big bore break in

Thank you for the replies. My question is I have 455 mi on the amsoil prebuilt can I run 500 miles on it, then change it and be done with it. Amsoil is $16 a quart. From my understanding and research top end break-ins do not produce as many metal filings as New motors.
 
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Old Feb 18, 2024 | 12:57 PM
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I would just use it for break in. Then change around 500.

Some people will debate using syn for seating rings. I have heard some claims new vehicles come with syn. I do not know, I break in with dino casue cheap
 
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Old Feb 18, 2024 | 01:06 PM
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Default 95 inch big bore break in

Thank you Rounders. I will call Big boy tomorrow, to see what his recommendation is. I will keep you posted thanks again
 
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