Results 1 to 4 of 4
  1. #1

    Join Date
    Nov 2008
    Location
    Stuart ,Fl
    Posts
    99

    Oversize pistons and machining slx780

    So one of the motors that blew out the lower bearing has stamped on the top of the pistons 1.00. Is this to show larger piston,or ring or?. Also who do i order the new one from. I need a good one and i have another cylinder which i believe will have to be taken to a machine shop to be bored out to accommodate this oversize.
    Incidentally. I couldn't help but notice a blemish in the piston pin on one of my good cylinders. Almost like a casting crevice. I'll try to take a picture. This was right where the roller bearings would have been riding. I have enough other parts from other motors to make a good one i think.


  2. #2
    1 is the last oversize for that cyl WSM sells them .. not sure who else does? not OEM or Wiseco ?

  3. #3
    Quote Originally Posted by desertmariner View Post
    SI couldn't help but notice a blemish in the piston pin on one of my good cylinders. Almost like a casting crevice. I'll try to take a picture. This was right where the roller bearings would have been riding. I have enough other parts from other motors to make a good one i think.
    a picture is best also of the piston tops if u can

  4. #4
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
    Join Date
    Oct 2006
    Location
    Cleveland OH
    Posts
    17,330
    +1
    31
    Yes, 1.00 is 1mm oversized. WSM or SBT have those sizes.

    SBT has a bad reputation from alot of members on this site, so people are often turned off by them. WSM on the other hand has a good rep with not too many people disliking them.

    A WSM piston kit will come with piston, rings, pin, and circlip. Everything but the wrist pin bearing.

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Need help removing pistons and bendix
    By cretamk in forum 2-Stroke Performance
    Replies: 6
    Last Post: 07-16-2007, 08:35 PM
  2. Rave valve plastic piston and cover, were can they be had?
    By crashem in forum Sea Doo Open Discussion
    Replies: 7
    Last Post: 07-09-2007, 07:21 PM
  3. WSM pistons and top end rebuild kits
    By Tony in forum Polaris Open Discussion
    Replies: 14
    Last Post: 06-10-2007, 11:12 AM
  4. Mixing OEM sized pistons with oversized pistons
    By vanlohd in forum Polaris Open Discussion
    Replies: 10
    Last Post: 05-20-2007, 10:50 PM
  5. Crank, piston and cylinder failour
    By christian gpr in forum Yamaha PWC Performance (2-stroke)
    Replies: 15
    Last Post: 07-21-2006, 05:58 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
  •