Page 1 of 2 1 2 LastLast
Results 1 to 10 of 18
  1. #1
    Moderator OsideBill's Avatar
    Join Date
    Mar 2006
    Location
    United States
    Posts
    11,875
    +1
    30

    Cylinder plating

    I have a set of ported 1200R cylinders I got recently and I am ready to install and noticed a little plating missing around the exhaust port. I need some opinions on this Thanks Bill
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	PWC 274.jpg 
Views:	62 
Size:	668.0 KB 
ID:	24484   Click image for larger version. 

Name:	PWC 276.jpg 
Views:	58 
Size:	705.4 KB 
ID:	24485   Click image for larger version. 

Name:	PWC 278.jpg 
Views:	83 
Size:	727.0 KB 
ID:	24486  
    Last edited by OsideBill; 05-11-2007 at 08:51 PM.


  2. #2
    jdog800's Avatar
    Join Date
    Feb 2007
    Location
    Alexandria L.A.
    Posts
    812
    Bill, this doesnt look that bad as long as there is nothing for the ring to get hung on. If it does affect compression which it may not, but if it does you will have a little more freespin on this cylinder which will rob some lowend power but will add to topend rpms. imo

  3. #3
    Moderator OsideBill's Avatar
    Join Date
    Mar 2006
    Location
    United States
    Posts
    11,875
    +1
    30
    The first two pictures are the same cylinder the third picture is another. the other cylinder I have is fine. These are ported by speedworks I am wondering if porting plated cylinders causes the delamination around the edges of the chamfers. in my opinion porting should be done prior to plating. I am just not sure I want to put these in my ski or not. They were running when pulled by previous owner who went big bore.

  4. #4
    YudLuz2's Avatar
    Join Date
    Jun 2005
    Location
    Flowood MS
    Posts
    1,647
    +1
    110
    That normally occurs while porting the cylinder. If your bit is not
    clean and you are not cutting at the correct speed the chipping
    can occur. It's not as bad on the oem plating, it can happen more
    often on the aftermarket plating. It can even happen when you are decking your cylinders. So caution must be taken. On the big
    bores some bore the cylinder, then they port and then send back to
    have plated. It's a lot longer process but works the best. The answer
    to your question could go either way, since the previous owner was running them, you could probably get by but the chiping could get worse
    and cause major problems. You could raise the exhaust port height
    to clean up the problem. But then you height might be to high for
    a single pipe setup. If it was a triple pipe setup I don't think there would be any problems from adding 1 to 2mm from a stock height cylinder.

  5. #5
    Me Hahn and Joe H204YOU's Avatar
    Join Date
    Jan 2006
    Location
    Panama City Beach Florida
    Posts
    1,535
    If it were mine I would use a very fine stone on a dremmel and very LIGHTLY and carefully chamfer it.Most would say nay,but if it ran before I would touch it up and run it again.You have a lot of good carma in your favor too Thats my 2 cents I'm cheap and easy Best wishes Bill

  6. #6
    Moderator Insanediego Joe's Avatar
    Join Date
    Mar 2006
    Location
    San Diego, California, United States
    Posts
    5,885
    +1
    142
    Consider this.

    Bill I have known you a long time now. You are a perfectionist. Are you really going to install those on your gpr like that?

    Remember one thing a great man once said.

    "The gpr platform demands perfection. Anything alse and it will exact its toll in $$$ and time wrenching"

    Hell, I have run 800 cylinders on my tripple piped gpr with hardly any nic left at all. It siezed a lot. Thats me, I just didnt care! I wanted to race come hell or high water. Your a busy guy Bill. Dont make a mistake that is going to cost you more precious time!

  7. #7
    Flying Scotsman's Avatar
    Join Date
    May 2006
    Location
    IllINOIS
    Posts
    6,514
    +1
    4
    Listen to Joe but you knew that before you asked the question.
    I know its killing you having to wait longer and the expense.
    Looks like you could get them replated or open them up and run pipes.
    Its a lot of money to take a chance on.

  8. #8
    Moderator OsideBill's Avatar
    Join Date
    Mar 2006
    Location
    United States
    Posts
    11,875
    +1
    30
    Ben Thank you my questions were answered regarding proper process.
    And since the exhaust ports are already raised I do not feel comfortable going higher.

    H204YOU I was considering feathering the edge with a stone I have done this in certain plated injection molding tools at work where delamination was an issue.

    Joe what can I say when you are right you are right.

    I have three options it seems

    1. Band aid it feather plating to reduce the edge and hope ring does not catch it.

    2. send it out for re-nick 2 weeks turn around $175 each

    3. Ask the seller to take it back.


    Lots to contemplate Thanks to all for the posts

  9. #9
    Moderator Insanediego Joe's Avatar
    Join Date
    Mar 2006
    Location
    San Diego, California, United States
    Posts
    5,885
    +1
    142
    Send them back to the seller. You can punch out any $100.00 used gpr cylinder. Its not worth the hassle.

  10. #10
    Moderator OsideBill's Avatar
    Join Date
    Mar 2006
    Location
    United States
    Posts
    11,875
    +1
    30
    Funny thing was that I cleaned and inspected these really good. I never noticed this until tonight the light was right and caught the difference in shine. The seller was kind enough to send these to me to check out first, I did and told him they were fine after initial cleaning and inspection so I sent him the money. I would not feel right going back now. This ones on me.

Page 1 of 2 1 2 LastLast

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Cylinder Nikasil Plating companies
    By RX951 in forum Yamaha How To & FAQs
    Replies: 6
    Last Post: 09-21-2015, 04:15 PM
  2. FS: Newly Nikasil Plated OEM Ultra 150/STX-R cylinder
    By SAVAGEXP in forum Kawasaki Classifieds
    Replies: 6
    Last Post: 10-01-2008, 07:31 AM
  3. Question about re-plated cylinders
    By blu4ce in forum Yamaha PWC Performance (2-stroke)
    Replies: 5
    Last Post: 07-27-2008, 08:16 PM
  4. cylinder re-plating?
    By smartalec_87 in forum Kawasaki Open Discussion
    Replies: 6
    Last Post: 06-09-2008, 07:07 PM
  5. Question on plated cylinder...
    By SLOANMAN in forum Yamaha PWC Performance (2-stroke)
    Replies: 1
    Last Post: 12-25-2007, 09:00 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
  •