Re: Which 70cc Kit From Treatland Should I buy?

Alan Jackson /
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piston in the ports doesnt matter.

its the point at which the piston opens the port that matters as this governs your port timing or duration.

if you try spacing your cylinder up 1mm to get the bottom of the ports level with the piston at bdc (which doesnt matter at all) as a side effect for every mm you raise the cylinder you raise the peak power by about 1500 -2000 rpm. obviously depending on stroke and current port height.

aim for duration ie port opening first. some manufacturers ie Husqvarna design their pistons at bdc to be ABOVE the bottom of the ports.

its sometimes beneficial to have the piston above so dont worry. but what is critically important is your duration and the point of opening .

dont take my word for it. google it.

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Subject Written By Posted
  Which 70cc Kit From Treatland Should I buy?Topic by: Michael Romco Michael Romco 08/25/21 04:15PM
  Re: Which 70cc Kit From Treatland Should I buy?Re: Mike Boyd Mike Boyd 08/25/21 04:35PM
  Re: Which 70cc Kit From Treatland Should I buy?Re: Probably Fred Probably Fred 08/25/21 09:16PM
  Re: Which 70cc Kit From Treatland Should I buy?Re: Thomas Peffer Thomas Peffer 08/26/21 09:04AM
  Re: Which 70cc Kit From Treatland Should I buy?Re: Jay Rivett Jay Rivett 08/26/21 10:42AM
  Re: Which 70cc Kit From Treatland Should I buy?Re: Graham Motzing Graham Motzing 08/26/21 10:54AM
  Re: Which 70cc Kit From Treatland Should I buy?Re: Steve Paul Steve Paul 09/16/21 10:08AM
  Re: Which 70cc Kit From Treatland Should I buy?Re: Graham Motzing Graham Motzing 09/16/21 12:53PM
  Re: Which 70cc Kit From Treatland Should I buy?Re: Cam Haley Cam Haley 01/02/22 09:52AM
  Re: Which 70cc Kit From Treatland Should I buy?Re: Alan Jackson Alan Jackson 08/26/21 01:49PM
  Re: Which 70cc Kit From Treatland Should I buy?Re: Graham Motzing Graham Motzing 08/26/21 04:59PM
  Re: Which 70cc Kit From Treatland Should I buy?Re: lucien vogin lucien vogin 08/30/21 02:40AM
  Re: Which 70cc Kit From Treatland Should I buy?Re: Michael Romco Michael Romco 08/26/21 11:02PM
  Re: Which 70cc Kit From Treatland Should I buy?Re: Graham Motzing Graham Motzing 08/27/21 12:20AM
  Re: Which 70cc Kit From Treatland Should I buy?Re: Thomas Peffer Thomas Peffer 08/27/21 07:48AM
  Re: Which 70cc Kit From Treatland Should I buy?Re: Michael Romco Michael Romco 08/27/21 01:02PM
  Re: Which 70cc Kit From Treatland Should I buy?Re: Alan Jackson Alan Jackson 08/27/21 02:40PM
  Re: Which 70cc Kit From Treatland Should I buy?Re: * wormdirt * * wormdirt * 08/28/21 12:55AM
  Re: Which 70cc Kit From Treatland Should I buy?Re: Graham Motzing Graham Motzing 08/29/21 10:25AM
  Re: Which 70cc Kit From Treatland Should I buy?Re: Daniel '' Daniel '' 08/29/21 11:11AM
  Re: Which 70cc Kit From Treatland Should I buy?Re: Graham Motzing Graham Motzing 08/30/21 05:00PM
  Re: Which 70cc Kit From Treatland Should I buy?Re: Aaron Ward Aaron Ward 08/30/21 05:12PM
  Re: Which 70cc Kit From Treatland Should I buy?Re: Satan 666 Satan 666 09/16/21 11:14AM

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