Results 1 to 2 of 2
  1. #1

    What size piston kit to order

    I have decided to go ahead and replace a piston due to low compresion 140,140,105 (front piston) on my SL 900. What size should I order STD, .50mm, or 1mm? It only has 100 hours, and probably hasn't ever been rebuilt. Also, what gaskets would you suggest to order with it? I was going to use a ball hone, and do it myself.

  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
    Join Date
    Jul 2007
    near Toronto, Canada
    Have you inspected the front (MAG) cylinder and piston yet?

    If the cylinder needs boring, that will determine what piston size you will need.

    Also check for play in the connecting rod bearing.

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. what size piston are these?
    By rxtnewbe in forum Yamaha PWC Performance (2-stroke)
    Replies: 1
    Last Post: 03-28-2008, 07:21 PM
  2. How bad to use A size piston is B cylinder?
    By whiteyz in forum Yamaha PWC Performance (2-stroke)
    Replies: 26
    Last Post: 09-17-2007, 10:20 PM
  3. Turbo Kit now available for pre order
    By Green Hulk in forum 4-Tec Performance
    Replies: 77
    Last Post: 05-18-2007, 04:13 PM
  4. prox piston-what size
    By uzi in forum Yamaha How To & FAQs
    Replies: 1
    Last Post: 05-09-2007, 09:49 PM
  5. Piston size
    By CanadianGPR in forum Yamaha PWC Performance (2-stroke)
    Replies: 9
    Last Post: 02-11-2007, 06:02 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts