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Small rubber bits in the oil?

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I picked up what appeared to be an extremely clean 2004 E (if the bike had > 1000 miles I would be very very surprised) model a few weeks ago and have been slowly getting it situated. While it runs really well I decided to drain the tank as I could see some minor junk in the bottom plus I wanted to add a new raptor petcock. Last week I put new coolant and hoses on the bike. The oil from the previous owner still looked quite golden so a decided take it out for a about a two hour ride. The bike ran really well with good power with only a little bit of jetting changes likely needed but I will address that after I pull the 3x3 rubber plug which is still in place.

 

Today I decided that I should go ahead and do an

oil/filter change just for peace of mind base line. The little magnet on the drain bolt had nothing clinging to it out of the ordinary which was good. Then during clean up after dumping my oil catch can into a larger recycle can IMG_1499991618.617978.jpgcan I noticed small bits of black rubber at the bottom of the catch can. The small pieces of rubber are all fairly uniform in size. I am not sure where these are coming from could anyone venture a guess? Here's a picture and for size reference I put a penny in there.

 

Thank you for any information.

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Hmm could be any number of gaskets. Start inspecting those. Off the top of my head I know the valve cover and dipstick have rubber gaskets. Maybe something in the countershaft sprocket area too. Beyond that, I don't know how rubber could get in the cases.

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When the engine is assembled, sealant is used on the case halves, valve cover half moons and the wires exiting the stator cover. You may well have some 'squeeze out' that got ground up and the bikes oil, based on what you say, may never of been changed so... that may be left over gunk from the original assembly. I hope you pulled the frame oil tank screen and cleaned it. I have seen quite a few brand new bikes that got the first 'cleansing' oil change at 50 miles and the screen was half clogged with the crap.

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William1 that would be in ideal situation and is what I am hoping for. I'm hoping it's not the welch plug or worse. I will pull the screen and update.

Much Appreciate the input:)

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Update

 

I put less than 10 miles on the bike since the oil change. Upon William1's recommendation I wanted to pull the frame screen to have a look. The new oil drained had approximately 20% of the rubber bits that were there originally. However when I pulled the frame screen there were no signs of rubber but there was metal. Not a huge amount but there was one particular piece that I fished out of the frame (using a telescopic magnetic pen) that has me concerned. The large piece actually looks a lot like remnants of a thread that is beginning to pull out, it doesn't appear like a smashed piece of metal. I have attached pictures of the filter and offending particles for reference.

 

The bike runs very good and sounds good (starts right up, no smoke). This is my 3rd drz so I have a decent reference for judging the power and usual sounds the drz emits. On my other drz bikes I did find some minor particles in the frame filter but never pieces as large as the one shown.

 

So my question is how should I proceed?

Should I ride it a few rides and pull the frame filter again in hopes that this is an anomaly or should I start tearing into the motor?

 

As always greatly appreciate any help

Thank you

 

 

IMG_1500992228.132621.thumb.jpg.97273afd0214b317733211995038b627.jpg

 

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Rusty is on the right track with the cam chain guide (not follower) tensioner problem. A manual cam chain tensioner ("mcct")is at the top of the must do list. The last pic you posted show shavings and I would suspect it's from a cam chain guide. The "mcct" takes about ten minutes to install and adjust. While the tool box is open double down on the engine insurance and do the picture fix now. New owners often neglect this and pay the price 10 fold later with a failed engine.

All priority work is covered in the faq page. Safe riding!

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They mostly look like thread shavings . With it the earlier model year version you can put in a manual tensioner , as long as you tension it right,  otherwise it can do just as much damage as the auto version being replaced. You can also put in an auto tensioner from a LT-500A "Vinson" atv , they have a bit lighter spring and won't put as much pressure on the chain ,which is the big reason it's commonly said to get rid of the ACCT.

Otherwise I'd flush the oil tank best I can, refill with clean oil and run it longer , maybe 400-500 miles and check the oil again . If there's more stuff then it'll be time to do deeper searching.

 

 

.

Edited by jjktmrider
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Greatly appreciate the input everyone. 

I went ahead and placed an order for the TT MCCT.  I looked at some cheaper options on fleabay but none of them appeared to have the o-ring seals which looks like a pretty good idea in this application.  Rustynut2 mentioned the rubber particles could be from the pieces that contact the ACCT.  He noted specifically part #2 & #4 in the schematic.  Are those items made of rubber?  Are they easily replaceable if they look as though my current ACCT has worn them out by placing too much tension on them?

jjktmrider

Glad to hear you don't sound excessively concerned with the findings in the screen.  I too was hoping to go a couple hundred miles (knowing me curiosity will get the best of me by 200 miles) and check the oil, filter, and screens again.  I didn't mention it in my last post but the magnets on the drain plugs are coming out very normal looking with very very minimal micro dusting of metal (similar to anything I have seen on my other drz's doing 1K mile interval oil changes)  when emptying the oil.  

Thank you

Edited by sbmon

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#2 & #4 are made out of a hard plastic type material with a metal core . Shaving from them would be black'ish/dark brown hard chunks or strip shavings  that would all be in the engine case so would come out when draining there , not much of that would be up in the tank and then down at the screen .

 

.

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#2 & #4 are made out of a hard plastic type material with a metal core . Shaving from them would be black'ish/dark brown hard chunks or strip shavings  that would all be in the engine case so would come out when draining there , not much of that would be up in the tank and then down at the screen .
 
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Excellent thank you for confirming. Just as you mentioned I am only finding those little hard plastic bits when draining the oil from the case. I found no signs of the plastic/rubber in the frame screen.

Thank you

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I should point out that Im new to the drz. I referenced #2 and 4 as a possible source to be investigated, not as a definite. I would crack it open and have a look see before ordering parts. I listed the picture to give you an idea where to look, good luck.

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Another little update. Today I received the TT MCCT and installed it. Basically adjusted the MCCT loose and tightened it up while bike was idling until the racket noise just stopped. The spark plug looked like the bike is jetted a little rich but that's something I will sort a little later. While I had the valve cover off I checked the valve lash. It looks like everything was good (nearly centered in the range) except for my right side intake which is right on the edge of acceptable at .1 mm. I will likely get a shim for it and adjust after a few hundred miles hopefully.

As far rubber bits go I did see a couple tiny bits in the cam chain area but only a couple specs.

Thank you for the help from everyone.
IMG_1501293134.476444.jpgIMG_1501293171.561589.jpgIMG_1501293182.996950.jpg

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