Results 1 to 4 of 4
  1. #1

    Sooooooo.....Does Boring over 1.5 all 3 pistons in a 1200 xl make it a 1300???

    So I took my 98xl to the lake yesterday and met up with one of my buddies with the same year yami with a original stock engine(1200cc)......we were talking about the ski's and I had mentioned to him that my engine blew up a few months back and I completely rebuilt it with over sized pistons(1.5 bored over)....well we raced a few times around the lake and his stock xl couldnt keep up with GPS was hitting 63-65mph and his was hitting 55mph wot.....he said there is no way that ski is a 1200cc...after I bored my engine over 1.5 on each cylinder it would make it a there any truth to what he was saying......I dont see how boring all 3 cylinders 1.5 over would make a 1200cc into a 1300cc........but mine does take off fast and has great top end than any ski on the water yesterday...

  2. #2
    lukejaeger1's Avatar
    Join Date
    Jul 2011
    No - should make it 1171 cc's. Your stock motor should actually be 1131 cc's. Displacement=bore(84mm) squared x .7854 x stroke(68mm) x number of cylinders /1000.

  3. #3

    Join Date
    Jul 2010
    it does give it more power. but 8-10mph..... it unlike. Make sure you are not running lean.

  4. #4
    Happily Self-Employed WFO's Avatar
    Join Date
    Nov 2005
    Houston, Texas
    1.5 bored over???

    like 1.5 mm over?

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. SOLD Brand New (in box) Riva .20 over 8.4:1 Pistons (3) with wrist pins & rings
    By psycho rxp in forum Sea Doo Classifieds
    Replies: 20
    Last Post: 04-10-2013, 07:57 AM
  2. USA summers almost over where are all the broken clutches???
    By gashog301 in forum Yamaha PWC Performance (4-stroke)
    Replies: 21
    Last Post: 09-11-2011, 07:14 PM
  3. Pistons for Pro 1200
    By Hayabusa in forum Polaris PWC Performance
    Replies: 20
    Last Post: 11-16-2009, 04:48 PM
  4. Bored over the long winter!
    By antoniodef in forum Sea Doo Open Discussion
    Replies: 2
    Last Post: 02-11-2009, 11:54 AM
  5. does worx grate cavitate at all?
    By baba850r in forum 4-Tec Performance
    Replies: 4
    Last Post: 11-18-2008, 12:29 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