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Posted (edited)

i was reading the paper that was in with my prolites it says to drill two holes centered on the exhaust port not going to waist your time on the exact dimensions. have any of you heard of this or done it .im not really sure if its nececary ive installed alot of pistons and never heard of this any info on this would be greatly appreciated also they are supposed to be lube holes and they only drill half the wthickness of piston skirt :banghead: :banghead: sorry about my spelling fingers not cooperating today

Edited by tnGRbanshee
Posted

The oil holes are for cylinders with an exhaust bridge, like an ATC/TRX250R...

 

The exhasut bridge must be properly relieved, and the oil holes are necessary to lubricate the bridge, it is a definite hot spot. The newer Wiseco pistons for the Rs come with two larger sized holes now instead of two smaller holes. Many people will drill a third hole for added protection. :geek:

Posted
The oil holes are for cylinders with an exhaust bridge, like an ATC/TRX250R...

 

The exhasut bridge must be properly relieved, and the oil holes are necessary to lubricate the bridge, it is a definite hot spot. The newer Wiseco pistons for the Rs come with two larger sized holes now instead of two smaller holes. Many people will drill a third hole for added protection. :geek:

thanks for the info this was kinda weird sounding to me

Posted
thanks for the info this was kinda weird sounding to me

me to but i didnt want to type all the info just figured someone might have knowledge on this .this place is like an encyclopedia for shees, so helpfull unlike the dealerships

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