New Piston Prototype Design With No Outside Wrist Pin Hole - Page 2
pxctoday

» Log in

User Name:

Password:

Not a member yet?
Register Now!

» Find OEM Parts

» Jobs

» wallpapers

Page 2 of 2 FirstFirst 12
Results 11 to 14 of 14
  1. #11
    PWCToday Guru mrwhipper's Avatar
    Join Date
    May 2017
    Location
    New Holland
    Posts
    411

    Re: New Piston Prototype Design With No Outside Wrist Pin Hole

    WOW!!! Talk about smarts and skill!!!!! That was awesome. I watched 3 of his vids so far.

  2. #12
    PWCToday Guru butterbean_29512's Avatar
    Join Date
    Sep 2013
    Location
    Bennettsville, SC
    Age
    48
    Posts
    361

    Re: New Piston Prototype Design With No Outside Wrist Pin Hole

    It's a moot point because the wrist pin is solid....there shouldn't be any leakage between ports. Also a solid ring will not flex in the exhaust port. Not sure if that's bad or not. I would think if it did not flex in and out it would have a greater chance of snagging the top or bottom of the ring on the port. Just my thoughts....I'm not an engineer. It is thinking out of the box though.
    Last edited by butterbean_29512; 03-17-2019 at 11:18 AM.

  3. #13
    Resident Guru JC-SuperJet's Avatar
    Join Date
    Jul 2013
    Location
    Cypress, TX
    Posts
    1,133

    Re: New Piston Prototype Design With No Outside Wrist Pin Hole

    The Wrist Pins in 2 Stroke Watercraft are hollow, like a tube. This is done to reduce the reciprocating mass for longer life and better acceleration.

    And because they are hollow, they could allow "communication" "tween Ports...

  4. #14
    PWCToday Guru butterbean_29512's Avatar
    Join Date
    Sep 2013
    Location
    Bennettsville, SC
    Age
    48
    Posts
    361

    Re: New Piston Prototype Design With No Outside Wrist Pin Hole

    It has been so long since I really looked at a wrist pin....I assumed it was tapered to a solid core. I think...however...it would be easier to just come up with a wrist pin with a solid core. It is very innovative thinking...but I think that such a large hole would be researched thoroughly...especially from the Yamaha engineers.. and if it caused a problem they would have done something different in that area. The OEM design is solid....I think they are designed to communicate between ports during the scavenging sequence....and a solid WP would possibly overheat.
    Last edited by butterbean_29512; 03-17-2019 at 06:36 PM.

Page 2 of 2 FirstFirst 12

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Powered by vBadvanced CMPS v4.2.0