Small end bearing blow up!!

Discussion in 'General Scooter Discussion' started by capri dave, Jan 10, 2009.

  1. capri dave

    capri dave Active Member

    Messages:
    5,076
    As you all know about a month a go I had a little trouble with my engine, when after fitting a
    yasuni city 16 pipe i blew a hole through my piston crown :?

    well im afraid more bad luck has struck the engine today....

    I started hearing a slight rattle coming from the engine, which only occured during tick over,
    then after a few days it occured during tick over and light throttle :?

    then eventually it did it all the time, and by now had got quite loud....

    As a precaution i went into work on the bus on friday, as i was sure something was a miss, I suspected either main bearing damage or possibly small end bearing damage :?

    So to day i stripped the engine down and found this :eek:

    [​IMG]

    [​IMG]

    [​IMG]

    Obviously there must of been some debris left in the engine from when i had the hole
    in my piston drama, the debris has damaged the small end bearing which in turn has damaged the
    piston and head...

    Im not messing around anymore, the engines getting a full rebuild, new crank, bearings, lightly flowed cases and as my piston and head on the rep are damaged im using that as an excuse
    to buy a more powerful 70 kit ;)

    The only down side is my Runner will be off the road for several weeks....

    oh well such is life....never mind

    ive gotta get changed and washed up now, im meeting the boys down the pub :) ;)
     
  2. kyle1b1

    kyle1b1 New Member

    Messages:
    5,191
    happens to the best of us.

    a new engine for a new year.

    now slap on the old spice and have this to walk down to the pub with :beer: ;)
     
  3. nibbles

    nibbles Active Member

    Messages:
    2,169
    wats the barrel look like ? n is it mhr rep i cnt member ? bad look m8 but ull be back on the old horse in no time lol. n good excuse for rebuild like u say lol
     
  4. capri dave

    capri dave Active Member

    Messages:
    5,076
    yep it happens....

    just got to make sure the next engines quicker ;)

    turn a - into a + :p

    right i really gotta go now :beer: :beer: :beer: :beer:
     
  5. MiNoR cOnFuSiOn

    MiNoR cOnFuSiOn Administrator Staff Member

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    et2 monster
    hmm, if your thinking evo i can probably figure you a twin ring kit with similar poirt area/timings for a bit less.. or somthing more suitable to a c16..
     
  6. shiny red

    shiny red New Member

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    1,224
    oh bad luck dave but as you say good excuse for new kit and a beer :beer:
     
  7. one7twoboi

    one7twoboi New Member

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    2,142
    init, more tuning opportunities, more power,more grunt,more speed.
    Any excuse ay? :rofl:
    And a bloody good excuse to give the old woman so you can go down the pub for a "quick one" :beer:
     
  8. MiNoR cOnFuSiOn

    MiNoR cOnFuSiOn Administrator Staff Member

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    as ive always said, blow it up, figure out why, build it bigger...
     
  9. Jefr0-180

    Jefr0-180 Active Member

    Messages:
    2,658
    Be looking forward to seeing the build up Dave. I bet as you did it you wasn't like oh fuck, it was like, right what do I need, bearings bla bla better 70 kit, ooh whilst it's split, new crank bit of flowing bla bla :blah:
     
  10. MiNoR cOnFuSiOn

    MiNoR cOnFuSiOn Administrator Staff Member

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    id guess he was quite pissed off.. pistons only a few weeks old... ah well, evo, wider case, bigger carb, huge smile
     
  11. kyle1b1

    kyle1b1 New Member

    Messages:
    5,191
    think he had a carb ligned up for it aswell :(
     
  12. greg531

    greg531 Member

    Messages:
    104
    Ouch, wish I could buy him a beer....bad luck....
    Maybe I will stick to my Laser Pro-X
     
  13. capri dave

    capri dave Active Member

    Messages:
    5,076
    Basically when i fitted the c16, because it was cold and miserable all the time
    I kept putting off doing a plug chop...."Ah its running really well it'll be ok" I thought....

    it was running lean and holed the piston, so its all my own making really :rtfm:

    And when it holed the piston and there was bits of metal everywhere, the correct thing to do would of been split the cases and make sure every scrap of metal was out, But no i tried to flush it out with petrol...

    oh well, i would say you live and learn, but i knew i was cutting corners when i did it, but people get lazy especially working on bikes in the winter :(

    no point moaning on, theres parts to collect for my next engine ;)

    It wont be an evo though, im going for something power wise in between a rep and an evo....about 15-16hp ;)
     
  14. shiny red

    shiny red New Member

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    1,224
    we live and learn dave :punk:
     
  15. Dec

    Dec Active Member

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    nothing ugm
    daves got his eye on a stage 6 racing i assume :D
     
  16. MiNoR cOnFuSiOn

    MiNoR cOnFuSiOn Administrator Staff Member

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    well, twin ring t6 kit will be spot on really... cheap, effective, and can be improved on DRASTICLY if you so decide to... single ring kits and miles dont mix (im having trouble geting a twin ring to last tbh)
     
  17. nibbles

    nibbles Active Member

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    2,169
    how much bhp could he get out of the kit if he imprved it .wiv flowed cases and his setup
     
  18. MiNoR cOnFuSiOn

    MiNoR cOnFuSiOn Administrator Staff Member

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    well, can lay an evo/mhr map over it, use a single ring piston and get the full 20bhp quoted if all the other parts are fitted.. easy 12 horse out the box if you widen out the transfers and match up the stup, slight raise on the zaust and sharpen the top shape and it will start pushing out the real power.. rpm becomes a factor tho

    ether way mine will be here somtime this week so ill have a grind an slam some pics/vids up..
     
  19. nibbles

    nibbles Active Member

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    2,169
    y do i get the feelin ull go for the evo map lol.
     
  20. MiNoR cOnFuSiOn

    MiNoR cOnFuSiOn Administrator Staff Member

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    nah, try'd it twice.. pipe dont like it. need a decent pipe next really.. well and a gear up. then ill push the timings right up, for now just a wide sport map... mabey have a play but nothing major till i have a pipe that likes harsh timings
     

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