1984 Yamaha fj 1100

[mikedastonfj1100]

how do I upload photos? I have pics of piston walls now...they look fine... piston tops look normal wear... all intake valves on carburetor side don't look fully seated with camshafts out....

[FJmonkey]

Posting photos is easy once you get the important details down. First, you need to publish them on the web somewhere. Flicker, Photobucket, Picasa, etc.... Or post them to you photo album in the FJowners gallery. Once they are publicly accessable, you need to copy the URL or path to that photo. Most of the time you can right click on the photo you want and chose the option like "Copy image/file location". When you paste it it will look like this: http://fjowners.com/gallery/3/104_20_10_12_5_59_46_7.jpeg

Then insert this [ img ][ /img ] (Note: spaces added to prevent it from reading as code.
Then put the URL in between the [ img ]http://fjowners.com/gallery/3/104_20_10_12_5_59_46_7.jpeg[ /img ]

Remove the spaces and you get the photo to display like below.




You can also see all coding by choosing to reply with quote. Remember to move your cursor below the bottom quote bracket so your comment is not mixed in the original quote.

[Capn Ron]

To capn Ron...

I see the two pistons u have.. What did u use to clean them with?

Hey Mike...

I pulled each piston and set them on the bench in order 1-2-3-4 and was mindful of the orientation.  I then cleaned each one individually and marked it with a Sharpie as to it's position in the engine and within each cylinder.  I wrote the numbers as I would read them sitting on the bike 1-4 from left to right.  That process in place, I just gave the top of each piston a shot with Easy-Off oven cleaner and let it sit for...ohhh...30 minutes.  I then scraped the resulting sludge off with a plastic scraper.  I then hit it again with oven cleaner and let it sit for 30 minutes and used a green scrunge to clean up the last little bits of carbon.  They came out looking like new!  Then I set about measuring them each in six ways...and likewise the cylinders with a bore gauge...Put a quick "freshening hone" on the cylinder walls, fitted up fresh rings and reinstalled.

Cap'n Ron. . .

[mikedastonfj1100]

Awesome tip   ...... Will give it a try... When u say green scrunge, do u mean one for cleaning pots and pans with?

[FJmonkey]

Awesome tip   ...... Will give it a try... When u say green scrunge, do u mean one for cleaning pots and pans with?

Maybe he meant one of these.

[mikedastonfj1100]

Hahahaha  that's funny:)

[Capn Ron]

Awesome tip   ...... Will give it a try... When u say green scrunge, do u mean one for cleaning pots and pans with?

Yes, exactly!  Well, not *exactly*...those scrubbing pads are available from a good hardware store in different grits.  White, red, green and black from the least abrasive to the most abrasive.  I keep those on hand and only go as gritty as the job calls for.  The green one did the trick with a little added elbow grease.   The one on the back of the pot scrubber sponge will do the same job! 

Cap'n Ron. . .

[rktmanfj]

how do I upload photos?

Shit.     

http://www.fjowners.com/index.php?topic=341.0

[mikedastonfj1100]

http://fjowners.com/gallery/7/thumb_4013_01_04_14_1_29_07_3.jpeg 
http://fjowners.com/gallery/7/thumb_4013_01_04_14_1_29_05_2.jpeg
http://fjowners.com/gallery/7/thumb_4013_01_04_14_1_28_59_0.jpeg
http://fjowners.com/gallery/7/thumb_4013_01_04_14_1_29_02_1.jpeg

this is as far as I got.... im thinking the rings are fine.... felt the walls for any scoring and found none.... forgot to take a pic of bottom of head to show valves... all intake valves were not fully seated... im thinkin possible bent or stuck valves....

what do you guys think??

[Flynt]

what do you guys think??

I think you need to post some bigger pictures...  by the time I zoom in enough to see anything, the resolution is horrible.  I'm not sure you'll get much feedback from these pics.

Frank

[FJmonkey]

 

Fixed It For You.

[racerrad8]

I think you need to post some bigger pictures…
Frank

Go to the gallery, you can zoom in on them.

I see what appears to be scoring on the cylinder with the piston at the bottom.

Pull the cylinders so you can see the piston skirts and cylinders better.

Randy - RPM

[mikedastonfj1100]

I will pull the pistons when I can find replacement rings... I'm gonna try some oil in the cylinders tomorrow... Maybe it might solve the compression...

[Flynt]

Go to the gallery, you can zoom in on them.

Thanks Randy...

Other than the scoring you can't see much here and nothing that looks catastrophic or would give you zero compression...  keep looking.  

Did you take pics of the head as well?  Definitely doesn't look like the valves hit the pistons...  not sure how they'd be bent.  They could be partially open just from poor/no valve adjustments?

Frank

[Capn Ron]

The pics in full size:









Yeah, I agree with most here...no smoking gun short of a little scoring of the cylinder walls on that last pic. 

Watching this thread with great interest...

Cap'n Ron. . .