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Spitting oil

Discussion in 'Yamaha 250cc In-Line 4's' started by cowmoo, Oct 7, 2010.

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  1. cowmoo

    cowmoo New Member

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    hey all

    I've been on this forum for a while, don't post much but keep an eye on things here. Bloody good resource!

    Anyway, I've got a problem with my little 3LN3 fizzer. Looked for other threads with similar problems but couldn't find any.

    She likes to spit a bit of oil out of the exhaust in tiny droplets, does so more when cold than warm, increases with revvs.
    There's also a bit of white smoke (not much at all) about 1-2 mins after it starts for the first time each day, the smoke lasts about 20 seconds then stops.

    She starts/runs fine and has smooth power all the way through the range, but I know the timing chain is a bit stretched (bit of rattling round 7k rpm) and not sure on the condition of the valves. I had them shimmed a few months back and they were well out of spec, the mechanic also told me they would need to be replaced shortly.

    So my question is: what do you think is causing the smoke and oil droplets? Is it the valves or do you think it needs new piston rings or somethine else entirely?

    And while I'm at it; anyone have a spare timing chain or set of valves in good condition?


    Thanks,
    Cowmoo

    P.S. Unrelated, but I'm also looking for original 3LN3 mirrors and a new clutch.
     
    cowmoo, Oct 7, 2010
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  2. Trev084

    Trev084 Active Member

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    These are common for condensating when 1st started, the moisture mixes with the carbon in the exhaust and comes out looking like oil, the white smoke is the water evaporating.

    Just have another look to see if it actually is oil.
     
    Trev084, Oct 8, 2010
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  3. dave

    dave Well-Known Member

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    Hit the nail on the head. You will find that if you catch the drips, they will evaporate after a while, just leaving the carbon..
     
    dave, Oct 9, 2010
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  4. cowmoo

    cowmoo New Member

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    Spot on Trev, cheers for the replies.
    Much happier now, I thought there was something big there haha.

    Pulling her apart now and fixing things here and there.

    Also installing a new muffler (these cheap ones from ebay: <!-- m --><a class="postlink" href="http://cgi.ebay.com.au/Yamaha-FZR-250-FZR400-Muffler-kit-Exhaust-kit-all-mds-/320599646109?pt=AU_Motorcycle_Parts_Accessories&hash=item4aa53a5f9d#ht_1263wt_907">http://cgi.ebay.com.au/Yamaha-FZR-250-F ... 1263wt_907</a><!-- m -->)

    If anyone's interested I'll make a quick before and after video to show the difference in sound between the stock can and the one above (getting the shorty 30cm).
    I doubt there'll be any difference in power, but I'll give it a test anyway.

    I was also going to take off the headers polish the inside, sand the outside then wrap them in something like this <!-- m --><a class="postlink" href="http://www.gbsalpine.com/english/collection_part/header_wrap.html">http://www.gbsalpine.com/english/collec ... _wrap.html</a><!-- m -->

    Any thoughts on this? Is it worth it? is there any reason I shouldn't?

    By the way Dave, you run a good forum, well organised and plenty of very helpful guides.

    Thanks in advance,
    Cowmoo
     
    cowmoo, Oct 11, 2010
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  5. METOO

    METOO New Member

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    I actually have the 30cm stubby can you're talking about. They are ok. I've already seen a small amount of rust in the bottom pot rivet on the can, also the bolts are cheap quality, get some better (stainless or alloy or something if you can).

    It'll be pretty loud without the baffle but legal. My 2kr EXUP @ 7,250 rpm 1 meter diagonally away from the tip of the exhaust produced 90 decibels (limit is 94). So be loud, and be proud <!-- s:Biker1: --><img src="{SMILIES_PATH}/th_Biker_1.gif" alt=":Biker1:" title="biker_1" /><!-- s:Biker1: -->

    Oh and they look pretty good too and so far good value for a sub 200 dollar exhaust. I VHT'd the headers while i had the exhaust off and it came up decent so you might as well do it now if you plan to.

    Enjoy
     
    METOO, Oct 11, 2010
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  6. blueyedjackel

    blueyedjackel New Member

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    PLEASE post a video of before and after also what colour stubby are you getting. METOO can i get a vid of yours as well please is it round or oval. also could you tell me why there are 2 different connection pipes one straight and one with a kink in it? does the pipe lie in the exact same place as the old one and does the oval one protrude slightly less than the round pipe. i gotta have an account to email the guy selling and cant be bothered. does it have any brand on it and who else sells this muffler.
     
    blueyedjackel, Oct 11, 2010
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  7. dave

    dave Well-Known Member

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    Will be interested to hear how you get on with the wrap..

    As for the forum - you have made me feel all warm and fuzzy now <!-- s:oops: --><img src="{SMILIES_PATH}/icon_redface.gif" alt=":oops:" title="Embarassed" /><!-- s:oops: -->
     
    dave, Oct 11, 2010
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  8. cowmoo

    cowmoo New Member

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    After some reading up on header wrap, I'm not 100% sure I'm still going to go that route.
    It seems it can cause hot spots and generally reduce the lifespan of the headers, although mine are in pretty good shape.
    I'll look into it further before deciding either way.

    I'll post a before and after video when I get the pipe on. I'm getting the chrome stubby.
    The connection pipes are for different bike models.
    There are no brand markings on these mufflers afaik.
    Creating an email account isn't that hard. <!-- s:wink: --><img src="{SMILIES_PATH}/icon_wink.gif" alt=":wink:" title="Wink" /><!-- s:wink: -->

    METOO thanks for the info, I'll replace the bolts etc when I get it.
    I'm not sure if I'll wrap or VHT the headers yet.
    Maybe I'll even get them chromed, they've still got a little bit of chrome around teh pipes haha.

    Cowmoo
     
    cowmoo, Oct 12, 2010
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  9. blueyedjackel

    blueyedjackel New Member

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    thanks a heap cowmoo appreciate it. i was just curious tho metoo said his bottom rivet was rusting which made me think in the original pipe its got a hole about that area for moisture to drain out. do these pipes have the same hole the pic dosen't show.
    Ive looked at the guys other listings and quite a few of the bikes use the same can (except the connector) looks like hes just mass producing for as many bikes as possible. tho check out the vtr250 spada can its got single and double holes for its exhaust. i reckon that would look better and its $40 cheaper, wonder i you could put that on this bike, there roughly the same engine.

    http://shop.ebay.com.au/flight20012...72%3A2392&_ipg=&_psize=3&_trksid=p3911.c0.m14
     
    blueyedjackel, Oct 12, 2010
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  10. METOO

    METOO New Member

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    hey guys sorry for the late reply but im on a phone. Ok the straight pipe i assume is for 3lns because i was the reason he made up the pipe with a kink.. It didnt fit my 2kr. There is no drain hole on the exhaust, it was rust but water like. As in i washed it off. It was only a little bit probably from the inside of the can and some water might have gotten in Then its run through the little gap in the rivet. yes all the pipes are generic. It just the link pipe that changes between bikes. As for the clearance from each pipe it should only be about 3 or so cm difference. But either im pretty sure the foot pegs will hit the ground before the exhaust.
     
    METOO, Oct 20, 2010
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  11. cowmoo

    cowmoo New Member

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    I got my exhaust yesterday, and the muffler was decent quality but the connector pipe was pretty shocking. The welds are all over the place with a hole about twice the diameter of a toothpick in one section, it hadn't been sanded properly before painting either.

    I'm going to contact the guy today as I've got his phone number and talk to him about what can be done. If he won't do anything I'll get the connector pipe fixed at a local welder and give it a good sand back inside and out, then repaint.

    For the price the muffler still isn't too bad, haven't had a chance to put her together though, won't be able to until Sunday most likely.

    I also painted my header pipes with VHT, matte black. I was going to wrap them with header wrap but after reading into it, it didn't seem like the best idea.
    I painted them pretty much just because they looked horrible covered in rust, I'll put some pics up shortly.

    I'm still going to make the before and after video, I'll put that up when I put her back together and take a video of the new pipe in action.

    Cowmoo
     
    cowmoo, Oct 20, 2010
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  12. cowmoo

    cowmoo New Member

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    Quick update; I just rung the guy and he's going to send another connector pipe out no questions asked. He was quite nice about the whole thing.

    I'll give another update once I get the new pipe.

    Cowmoo
     
    cowmoo, Oct 20, 2010
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  13. METOO

    METOO New Member

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    Got one of those usb internet sticks now (yay).

    Yeah my connector pipe had carbon in it and pretty average quality all round but yeah the pipe isn't too bad. Looks good when its new.

    Question though to cowmoo: is your baffle a pain to get out??? mine is, have to get the can off the bike then put a broom/rake/long thin strong item and smash it down. Then need a hammer to get it back in, hence why I checked the decibel level if it with it out so I could just leave it out.
     
    METOO, Oct 20, 2010
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  14. cowmoo

    cowmoo New Member

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    Haven't tried to get it out with any effort yet. How hard did you have to smash it? I'll give it a go now.

    Cowmoo
     
    cowmoo, Oct 20, 2010
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  15. cowmoo

    cowmoo New Member

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    Ok, tried smashing it out, no go. I didn't want to do it too hard though, because I'm not sure I'm doing it right <!-- s:oops: --><img src="{SMILIES_PATH}/icon_redface.gif" alt=":oops:" title="Embarassed" /><!-- s:oops: -->
    Am I supposed to be taking the little hex head screw out of the side near the end and trying to bash the baffle out that end?
    It didn't seem to want to move more than 1/2cm or so.

    Cowmoo
     
    cowmoo, Oct 20, 2010
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  16. METOO

    METOO New Member

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    You have to take out the 5mm alan key screw in the end. Then get the can and RAM a broom handle through it.

    The way i got it was to balance the broom handle between my knees standing up, holding the can in both hands then slamming it down.

    Your not doing anything wrong, just not hitting it hard enough <!-- s:lol: --><img src="{SMILIES_PATH}/icon_lol.gif" alt=":lol:" title="Laughing" /><!-- s:lol: -->

    P.S. make sure nothing is within firing range (ie aim the end of the can away from breakables... trust me, you wont damage the can (or shoulnt <!-- s:alcoholic: --><img src="{SMILIES_PATH}/icon_all_coholic.gif" alt=":alcoholic:" title="Alcoholic" /><!-- s:alcoholic: --> ))
     
    METOO, Oct 20, 2010
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  17. cowmoo

    cowmoo New Member

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    Ok, bit of an update:

    I received a second pipe in the mail but that also had a hole in it, so I took it to a fabricator and got the welds cleaned up, then resprayed.

    It fits on the bike ok but the pipe sits at a strange angle, so I'll be getting it bent out a bit more and cutting the flange off the pipe and welding at a different angle.
    I'll put up some pics when I get home tonight to show you what I mean.

    As for the sound, it sounds real deep and throaty without the baffle in, but that seemed to take away a bit of low end power, and was pretty loud haha.
    With the baffle in, it still sounds deeper and throatier than the stock muffler, over all I'm happy with that.
    I'll put up the before and after video tonight as well.

    Cowmoo
     
    cowmoo, Nov 18, 2010
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  18. METOO

    METOO New Member

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    I would also like to add that the black has changed/in the process of changing colour. The top half is now a browny gold kind of thing. It actually looks ok but yeah thought id post to let you know that after a few months yours might change as well.

    Yeah i just leave the baffle out. Its pretty loud but i love rocking up to school on 'the beast' <!-- s:alcoholic: --><img src="{SMILIES_PATH}/icon_all_coholic.gif" alt=":alcoholic:" title="Alcoholic" /><!-- s:alcoholic: -->
     
    METOO, Nov 18, 2010
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  19. cowmoo

    cowmoo New Member

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    Video and pic:

    <!-- m --><a class="postlink" href="http://www.youtube.com/watch?v=msclEmumF7k">http://www.youtube.com/watch?v=msclEmumF7k</a><!-- m -->

    [​IMG]

    Cowmoo
     
    cowmoo, Nov 18, 2010
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  20. cowmoo

    cowmoo New Member

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    Also, when I got the pipe welded, I stripped it back and resprayed with VHT paint, so hopefully min should stay black.

    Cowmoo
     
    cowmoo, Nov 18, 2010
    #20
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