Page 136 of 138 FirstFirst ... 86126134135136137138 LastLast
Results 1,351 to 1,360 of 1372
  1. #1351
    man, if my pistons burned so often, the first thing I would do is return the original heads. then I tuned the engine and after only long trips and confidence in the engine, I would install the tuning head.

  2. #1352
    Quote Originally Posted by Oleg Russia View Post
    man, if my pistons burned so often, the first thing I would do is return the original heads. then I tuned the engine and after only long trips and confidence in the engine, I would install the tuning head.
    I agree but I burned up two pistons with the stock heads installed. The ADA head has nothing to do with my issue.

  3. #1353
    Either I am or this ski is cursed! I connected the Harbor Freight compression tester and all the cylinders are reading about 20 PSI higher than the snap-on tester. They are all at just over or about 90 PSI. All of a sudden the new HF tester stopped reading. It kept reading zero. The HF tester has the Schrader valve in the hose of the gauge whereas the snap-on has the Schrader valve in the hose end that screws into the cylinder. For whatever reason the HF is not pushing down on the Schrader valve and allowing air to flow to the gauge. I have tried several different things to get it to work and it only reads temporarily. The part that's supposed to slide inside the hose to compress and release the Schrader valve is sticking. I shouldn't be shocked it is made by Harbor Freight. I then decided to start the motor with two cylinders connected and the snap-on tester connected to one of the cylinders. I let it run for about 3 seconds and I was getting around 121 to 122 PSI on cylinder 3. Which means if the snap-on tester is off by 20 PSI because of the hose being defective that I am right where I should be in the low 140s to mid 140s. Stock heads are usually in the 120s on a fresh motor I believe. So being in the 140s with the 42cc heads is perfect. The 42cc heads are suppose to add about 20 PSI of compression. I am off now to find another compression tester to verify what I think is correct.

    I swear to God I can't imagine anyone having more problems than I've had with this ski or working on it. Maybe it's time for me to go back to church!

  4. #1354
    steve45's Avatar
    Join Date
    Feb 2008
    Location
    Texas
    Posts
    8,633
    +1
    887
    Church is good.

  5. #1355
    I picked up another compression tester from O'Reilly's. It is similar to the Snap On tester. The Schrader valve is in the hose that connects to the head. The gauge doesn't have a hose on it. Just the quick connect. I tested all 3 cylinders and they are all between 141psi and 145 psi. I also checked them using the Snap On gauge and I got the same readings. This was with the motor not running and with the plugs installed in the cylinders I wasn't testing. That means I am right where I should be. Next time in the water I will give it a bit more and see how it goes. I haven't gone WOT at all yet. It is time I think but for only a few seconds.
    Click image for larger version. 

Name:	IMG_20210724_160546.jpg 
Views:	21 
Size:	56.0 KB 
ID:	476442
    Click image for larger version. 

Name:	IMG_20210724_154946.jpg 
Views:	26 
Size:	46.2 KB 
ID:	476443
    Click image for larger version. 

Name:	IMG_20210724_154906.jpg 
Views:	19 
Size:	48.8 KB 
ID:	476444


  6. #1356
    I just took it out for a quick ride. I did about 10 WOT runs but for no longer than 5 seconds each. It seems to be running perfectly. Triple pissers all feel like the same temperature. I checked the heads using a laser thermometer and they are all always within a couple degrees of each other. I pulled the plugs and took a pic of cylinder 1 and 3. I left cylinder 2 plug out of the pic because that plug is newer and looks different. Not bad just much different. I plan on installing three new plugs after I am done breaking it in and done with the 50:1 in the tank. I think these two plugs look good but they don't have much time on them so who knows.
    Click image for larger version. 

Name:	IMG_20210724_171303.jpg 
Views:	23 
Size:	177.8 KB 
ID:	476445

  7. #1357
    I wanted to mention that I did check the compression with the motor running using the O'Reilly's tester. It measured much higher with the motor running. It was hitting about 160 psi with the motor running. So with the motor running on two cylinders it increases the compression reading by about 20 psi. I only ran it at idle. I didn't rev it up. I figured I would mention that in case anyone reads about this. I don't know if it is safe to run the motor on two cylinders while checking compression on the third but I did it. Don't do what I do. I am only posting my results not recommending anyone to do it.
    Click image for larger version. 

Name:	IMG_20210724_154018.jpg 
Views:	17 
Size:	44.4 KB 
ID:	476446

  8. #1358
    steve45's Avatar
    Join Date
    Feb 2008
    Location
    Texas
    Posts
    8,633
    +1
    887
    Hey, thanks for telling us about it! That's something I've never heard anyone even suggest before you did.

  9. #1359

    Join Date
    May 2020
    Location
    Lake Lanier, Georgia
    Posts
    198
    +1
    10
    I don't think it would b4e harmful to run the engine for a few seconds with the compression gauge hooked up... I even accidently ran mine for a few seconds with one plug out trying to check for spark

  10. #1360
    Quote Originally Posted by SeawardToast View Post
    I don't think it would b4e harmful to run the engine for a few seconds with the compression gauge hooked up... I even accidently ran mine for a few seconds with one plug out trying to check for spark
    I agree but since I am not 100% positive it is safe to do I don't want to recommend it. Plus it does increase the compression reading so the results won't be accurate.

Page 136 of 138 FirstFirst ... 86126134135136137138 LastLast

Thread Information

Users Browsing this Thread

There are currently 3 users browsing this thread. (0 members and 3 guests)

Similar Threads

  1. Just bought a 2002 Polaris Genesis 1200 need Sponsons
    By srps13 in forum Polaris Open Discussion
    Replies: 3
    Last Post: 05-18-2015, 09:03 PM
  2. 2002 Kawasaki STX 1200 R
    By 2006 Hayabusa in forum Kawasaki Projects
    Replies: 0
    Last Post: 05-06-2014, 10:37 PM
  3. FS 2002 Kawasaki 1200 STX-R Parts
    By grumpy_steven in forum Kawasaki Classifieds
    Replies: 4
    Last Post: 03-30-2011, 05:47 PM
  4. FS 2002 STX-r 1200 Ski for sale
    By waterman in forum Kawasaki Classifieds
    Replies: 4
    Last Post: 07-11-2010, 12:16 PM
  5. 2002 Kawasaki 1200 STX-R
    By Black Hills TJ in forum Kawasaki Open Discussion
    Replies: 4
    Last Post: 04-28-2010, 08:28 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
  •