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Tractor Talk Discussion Forum

Re: break in secrets

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dr.sportster

02-12-2005 07:16:05




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Matt I just read over that site breifly.I disagree with the principle of his method.It is speaking about jap bikes.These motors have way less piston speed than motors I rebuild.Dyno break in or hard run break in may be suitable for tractors also but if you run in a long stoke motor with high to excessive piston speeds you will ruin the rings.I too have disassembled motors for inspection to satisfy my own curiosity.He is not really showing enough data other than the picture of the one honda piston which could have the brown mark for several other reasons.I might subcribe to his magazine but I will break in my motors per instructions of the speed equipment I install.However he might still be correct for motors with normal piston speeds.also he states this is possible due to modern machining methods.The way Im building a motor is the same for years.What modern machining other than a finer cross hatch pattern is he talking about.I believe his break in may be right for those short stroke hondas just not for all type motors.Good info anyhow.I will be glad to discuss this further as there are many factors that affect the sealing of the piston rings.

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dr.sportster

02-12-2005 07:35:07




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 Re: break in secrets in reply to dr.sportster, 02-12-2005 07:16:05  
Matt, I will never figure out how to open the email thing in the corner.Heres my email if anyone wants to discuss ring sealing.Also that sentence I wrote I disagree with the principle of his method,Well I dont even know what that means.Trying to sound knowledgable by speaking BS. please_be_nice@att.net Wifes E mail.[ITS her computer]



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dr.sportster

02-12-2005 14:11:54




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 Re: break in secrets in reply to dr.sportster, 02-12-2005 07:35:07  
I will not go into further detail here but it is a motorcycle issue not a tractor issue.You probably broke your truck in correctly if you listened to the manufacturer.I making a chart on Harley -Davidson piston speeds that should be ready tommorow if any body cares.It is in feet per minute of piston travel for various RPM.PS=strokexRPM/6 At stock stroke it is excessive when you add stroker fkywheels it surpases normal engineering recomendations.So in the first fifty miles for the rings ,RPM gets very critical.

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dr.sportster

02-13-2005 06:15:36




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 Re: break in secrets in reply to dr.sportster, 02-12-2005 14:11:54  
Dat boy gonna blow up dem fancy japoneez motorsickles.



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