Oily tire?

[timleslie1957]

Hello fellow FJers,

My rear tire is getting oily on the extreme right edge of tread.  I do see some spots on garage floor, not big but there.  Thoughts?  I am babying it around right turns right now.  It is an 89 stock FJ with V&H 4 into 1 sport system.

[Country Joe]

Check for leaks around the clutch cover gasket. If it has ever been dropped on the right side, the rear brake lever is likely to crack the clutch cover as well.

[PaulG]

Also - If you have a stock airbox you might want to check and see if the PCV hose is properly attached to it, or the crankcase.  You might get some oil mist spraying to the rear if not.  Kinda' hard to see as it's tucked away between the carbs and the box.

If you have air pods make sure the PCV hose/filter is in good shape - or if it's still there....   

[Pat Conlon]

Good advice Joe and Paul 

The stock air box can collect oil in the bottom from engine blow by, common with high mileage engines. There is a drain hose at the bottom of the air box.
Open up the air box and clean out the floor and check this drain hose. Reroute it if necessary.

My money is on Joe's diagnosis. 

Cheers

[FJmonkey]

My '86 is parked due to oil leaking on the rear tire. It was a cautious ride home when I discovered it. In my case it is a cracked case at the rear mount. This leaked to the left side and transferred to left side of the rear tire. I hope your solution is much easier to fix.

[timleslie1957]

Check for leaks around the clutch cover gasket. If it has ever been dropped on the right side, the rear brake lever is likely to crack the clutch cover as well.

Thanks.  I will take a closer look there.  PO reports no leaks and  I have never dropped it but worth a good look.

[timleslie1957]

Also - If you have a stock airbox you might want to check and see if the PCV hose is properly attached to it, or the crankcase.  You might get some oil mist spraying to the rear if not.  Kinda' hard to see as it's tucked away between the carbs and the box.

If you have air pods make sure the PCV hose/filter is in good shape - or if it's still there....   

I have only owned for three weeks.  Have not looked at this but know it has a one piece element that is cleaned versus replaced.  I did see a hose that was clear poly that I kind of just tucked  back into the frame that was loose.  Maybe that is the problem?

[timleslie1957]

My '86 is parked due to oil leaking on the rear tire. It was a cautious ride home when I discovered it. In my case it is a cracked case at the rear mount. This leaked to the left side and transferred to left side of the rear tire. I hope your solution is much easier to fix.

I can only hope this would not be the case ....

[Hersey289]

I just recently resolved an oil leak that ultimately was due to a crack in the engine case at the upper right rear mount. It was a mess, leaking oil onto the back of the engine, the rear shock, under the starter and down by the front sprocket onto the oil pan and center stand. Luckily, no oil went onto the tire. To fix this, I loosened and removed the rear mount through bolt. What was surprising was that this bolt had a lot of tension on that mount which was readily apparent when the bolt was removed. It felt like the engine settled to its own equilibrium. To ensure there was no undo stress, I then rotated the anti-vibration rubbers so that the through bolt could be installed easily. Alignment of the sprockets still looked fine. I then treated the case cracks with a flexible high strength silicone called Dirko. Check it out- it is made for this type of fix. So far, the engine is leak free. Hopefully you don't have this issue but if you do, this might work. If this fix doesn't  last, I'll  remove the engine, drill a small hole into the ends of the cracks and tig weld from the outside only.

Rob

[FJmonkey]

Regular high temp RTV did not fix mine, the TIG welding Ryan did at RPM also did not hold. The current theory is the frame is bent from a low side involving a curb a long time ago. The frame is inducing stress. It also does not help that I use full synth. Dino oil burns off during the weld, full synth does not and contaminates the weld. Making a weld from the outside only difficult and reduced chance of success.

[timleslie1957]

Okay ... Found the leak. Source.  On oil pan schematic it is part m25.  A hex bolt right side of pan fittex horizontally into pan right above where header collector for Vance & Hines system is.  I tightened carefully.  It was very loose.  I hardly put any pressure on and the very top of the bolt sheared off.  The rest remained intact and had plenty of hex left to tighten and stop leak.

PLEASE identify what the heck this is for and where I might acquire a new one?  I looked for hours and did not find part or supplier.  What is this thing?

[Pat Conlon]

#25 plug ($4.14) and #26 o ring ($2.11) still available to buy.
https://www.partzilla.com/catalog/yamaha/motorcycle/1989/fj1200w/oil-filter

Is this what you're talking about?

[racerrad8]

PLEASE identify what the heck this is for and where I might acquire a new one?  I looked for hours and did not find part or supplier.  What is this thing?

Tim,

You you could have saved yourself hours by heading right over to RPM. If you have the part number from the Yamaha schematic, you can enter that into the RPM website search function. If it is a stocking part on the RPM shelves it will pop right up.

Oil Pan Galley Plug

Here is the current oil ring for that galley plug: Oil Pan Galley O-ring

The banner ad at the top of every page is not false advertising...#1 Worldwide Source for FJ Parts

Randy - RPM

I'll have to fix the photos tomorrow, but that is the plug & o-ring you are referring to.

[timleslie1957]

Yes!

[timleslie1957]

PLEASE identify what the heck this is for and where I might acquire a new one?  I looked for hours and did not find part or supplier.  What is this thing?

Tim,

You you could have saved yourself hours by heading right over to RPM. If you have the part number from the Yamaha schematic, you can enter that into the RPM website search function. If it is a stocking part on the RPM shelves it will pop right up.

Oil Pan Galley Plug

The banner ad at the top of every page is not false advertising...#1 Worldwide Source for FJ Parts

Randy - RPM

I'll have to fix the photo tomorrow, but that is the plug you are referring to.

Thanks.  I will order it and ring tomorrow.