Results 1 to 3 of 3
  1. #1
    urugol's Avatar
    Join Date
    Nov 2009
    Sydney, Australia

    Boring Measurements for the Pro

    Ok I'm still an apprentice here so I expect I have done something wrong. As any wannabe engine builder I decided to pick up a bore gauge to take some readings, and I am looking at the Pro Cylinders to check the existing clearance as I'm going to be putting in Wisecos. I have one of these digital bore gauges, accurate to 0.001mm but I'm having some difficulty getting correct readings if someone has some experience with these I would appreciate any input.

    So I have taken the 2.6" post with the 0.1" and 0.2" washers to give me a 2.72" post, or 69.088mm. I have then set that as the absolute value for measuring, and found that I am well under the 69.70X that I am looking for (technically it shouldn't fit in the bore).

    What am I doing wrong here? Is it a calibration issue?
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Gauge2.jpg 
Views:	31 
Size:	63.5 KB 
ID:	230342   Click image for larger version. 

Name:	Gauge1.jpg 
Views:	29 
Size:	110.0 KB 
ID:	230341  

  2. #2
    bowsniper's Avatar
    Join Date
    Aug 2008
    Attached Images Attached Images   

  3. #3
    LaveyT's Avatar
    Join Date
    Jul 2008
    You need to set the gage with a set of O.D. micrometers or a "ring master setting gage" ideally.
    I prefer the anolog gages because I find it easier to determine when I have the gage on the same "plane" as the bore.

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. quick question for the pro's(785)
    By jkevin50 in forum Polaris Open Discussion
    Replies: 8
    Last Post: 07-05-2010, 03:43 PM
  2. question for the PRO's... about PV's
    By flyboy in forum Yamaha PWC Performance (2-stroke)
    Replies: 23
    Last Post: 08-23-2008, 12:15 PM
  3. Questions for the pros.
    By hitevrywave in forum Sea Doo Open Discussion
    Replies: 3
    Last Post: 03-21-2008, 07:42 PM
  4. a coupla questions for the pro's
    By VaRedneck in forum 4-Tec Performance
    Replies: 13
    Last Post: 02-09-2008, 10:49 PM
  5. Got a new look and have a Question for the pro's??
    By psi_2_high in forum Sea Doo Open Discussion
    Replies: 5
    Last Post: 11-09-2007, 08:33 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