Page 1 of 2 1 2 LastLast
Results 1 to 10 of 18
  1. #1

    Join Date
    Aug 2008
    Location
    Atlanta
    Posts
    28

    99 xpl running kinda slow. questions??

    Ok today was my second day out on the ski and I can still only manage a 53.6 mph @ 6500 rpm's (on gps) . My first day out was the same thing and I took it home and was looking it over and thinking about changing my fuel lines when I noticed the throttle cable wasnt attached to the second carb (the one closest to the nose) the little set screw had came out. Well I thought that was the problem the first day out only netted a 53mph. So I bought a new set screw and got that hooked up but it made no difference out today!?! The ski runs great and has no issues! I starts and runs perfect. The only issue is I would think it should be a little close to 60 if not 60 mph. I have done a compression test on both cylinders and one was 131 and the second was 130. After I got back today I was looking at the motor and noticed the rave valves are screwed all the way down and from what I have read it looks like they are suppose to be flush? could that be a problem? Anyways what do you guys think My first steps should be to figuring out why its not running any faster? I am new to ski's and 2 strokes but not mechanics.

    Thanks in advance.
    Ryan


  2. #2

    Join Date
    Aug 2008
    Location
    Atlanta
    Posts
    28
    Here is a picture of the rave
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	174.jpg 
Views:	36 
Size:	29.3 KB 
ID:	91451  

  3. #3
    My Jet Ski drinks more than yours Glenozzy's Avatar
    Join Date
    Apr 2008
    Location
    SML, VA
    Posts
    725
    +1
    4
    ok first you are correct on the rave, but it's easy to test just pull the cover off the rave watch out for the spring and go for a test ride your low end will suck but you should get your top end back. if you do. try and adjust the raves up.

    have you cleaned them?

  4. #4
    4ringturncoat's Avatar
    Join Date
    Jul 2006
    Location
    Kalamazoo, MI
    Posts
    40
    Quote Originally Posted by TurboV6Sonoma View Post
    Ok today was my second day out on the ski and I can still only manage a 53.6 mph @ 6500 rpm's (on gps) . My first day out was the same thing and I took it home and was looking it over and thinking about changing my fuel lines when I noticed the throttle cable wasnt attached to the second carb (the one closest to the nose) the little set screw had came out. Well I thought that was the problem the first day out only netted a 53mph. So I bought a new set screw and got that hooked up but it made no difference out today!?! The ski runs great and has no issues! I starts and runs perfect. The only issue is I would think it should be a little close to 60 if not 60 mph. I have done a compression test on both cylinders and one was 131 and the second was 130. After I got back today I was looking at the motor and noticed the rave valves are screwed all the way down and from what I have read it looks like they are suppose to be flush? could that be a problem? Anyways what do you guys think My first steps should be to figuring out why its not running any faster? I am new to ski's and 2 strokes but not mechanics.

    Thanks in advance.
    Ryan
    By talking about the set screw you are looking at the choke not the throttle. The carbs throttle plates are connected by the mag carb (which is connected to the throttle cable) by a simple linkage. The RAVE valves for the motor should be all the way down, the RAVE for the water injection should be flush.

    Compression is hard to get on these motors, battery and starter condition make them questionable.

    Check the head-pipe bolts to be sure you do not have a leak there, it will kill power and your crank.
    Last edited by 4ringturncoat; 08-28-2008 at 09:48 PM.

  5. #5
    Check the water regulator on the water box. Those things give me fits and cause the lack of performance you are experiencing. You should be at 60-61 turning 6850-6900 rpms.

  6. #6

    Join Date
    Aug 2008
    Location
    Atlanta
    Posts
    28
    Quote Originally Posted by 4ringturncoat View Post
    By talking about the set screw you are looking at the choke not the throttle. The carbs throttle plates are connected by the mag carb (which is connected to the throttle cable) by a simple linkage. The RAVE valves for the motor should be all the way down, the RAVE for the water injection should be flush.

    Compression is hard to get on these motors, battery and starter condition make them questionable.

    Check the head-pipe bolts to be sure you do not have a leak there, it will kill power and your crank.
    So should both of these rave valves in this picture be down or flush? and why would someone screw them down if they are suppose to be flush what would the purpose be?
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	002.jpg 
Views:	45 
Size:	130.6 KB 
ID:	91565  

  7. #7

    Join Date
    Aug 2008
    Location
    Atlanta
    Posts
    28
    Quote Originally Posted by racer114 View Post
    Check the water regulator on the water box. Those things give me fits and cause the lack of performance you are experiencing. You should be at 60-61 turning 6850-6900 rpms.
    Not to sound stupid but like I said Im new to ski's and 2-strokes... So where is the water regulator and how do I check it?


    Thanks.
    Ryan

  8. #8
    4ringturncoat's Avatar
    Join Date
    Jul 2006
    Location
    Kalamazoo, MI
    Posts
    40
    Run them down. You can play with them a little to change how the lower end hits. All they really do is change the exhaust timing. You will have less bottom end if you run them flush. If they are working properly it won't matter for top end.

    Take the caps off (be sure to hold onto the springs), then remove the single line going to the raves, you should be able to blow (with you mouth) on the line and see them move up. If they don't move they need to be rebuilt. If they move then I would check the water reg and make sure you do not have a leak at the headpipe.

  9. #9
    The regulator is on top of the waterbox and looks just like the RAVE valve. I had trouble with one on a 2002 XPL I used to own and the performance was similar to what you are experiencing. I replaced the regulator and I was back to normal.

  10. #10

    Join Date
    Aug 2008
    Location
    Atlanta
    Posts
    28
    Quote Originally Posted by 4ringturncoat View Post
    Run them down. You can play with them a little to change how the lower end hits. All they really do is change the exhaust timing. You will have less bottom end if you run them flush. If they are working properly it won't matter for top end.

    Take the caps off (be sure to hold onto the springs), then remove the single line going to the raves, you should be able to blow (with you mouth) on the line and see them move up. If they don't move they need to be rebuilt. If they move then I would check the water reg and make sure you do not have a leak at the headpipe.
    Ok the valve on the right moves freely blowing and sucking and the one on the left moves but not like the other one and it get stuck about a 1/4 of the way out and wont go any further out. So how do I rebuild them? is there a rebuild kit to buy somewhere? dealer? internet?

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. '99 XPL RPM Question
    By kidafa in forum 2-Stroke Performance
    Replies: 38
    Last Post: 12-25-2009, 07:49 AM
  2. FS Parting running 99 xpl
    By ALOHR in forum Sea Doo Classifieds
    Replies: 0
    Last Post: 10-13-2009, 03:33 PM
  3. 99 xpl questions on racing
    By pyroguy1974 in forum Sea Doo Open Discussion
    Replies: 1
    Last Post: 08-14-2008, 05:55 AM
  4. 02 XPL runs great and then starts to slow down, help!
    By 4ringturncoat in forum 2-Stroke Performance
    Replies: 2
    Last Post: 07-29-2008, 07:44 AM
  5. 99 XPL closed course ski questions
    By redbull in forum 2-Stroke Performance
    Replies: 11
    Last Post: 12-06-2007, 08:31 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
  •