SBT Jetski Engines, Parts & Accessories

Results 1 to 2 of 2
  1. #1
    Joined
    Jul 2012
    From
    Tennessee
    Posts
    2

    Default JS550 to bore or just hone and rings

    I have a 88 550 that was really hard to get started but ran really good when running. I did a compression check and it is down to 90psi. This engine is bone stock. I pulled the head and checked the bore at top and bottom. It is reading 75.08. Is this enough to justify boring the cylinders out or just hone and new rings? I plan on new crank seals while I have it apart. Is stock bore 75mm or 75.03mm. Thanks

  2. #2
    Joined
    Jun 2016
    From
    Clearwater, Florida
    Posts
    278

    Default Re: JS550 to bore or just hone and rings

    Stock is 75MM it sounds like it needs bored to an oversize.

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Kaw 750 bore size-pistons and rings?
    By allsho80 in forum Kawasaki
    Replies: 1
    Last Post: 05-29-2008, 12:31 PM
  2. What grit flex hone.
    By jetcam2 in forum Sea-Doo
    Replies: 3
    Last Post: 02-08-2002, 12:24 AM

Posting Permissions

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