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Crank shifted I do believe

Discussion in 'Motorcycle Tech Talk' started by MUDFLAP, Nov 10, 2012.

  1. cardboard

    cardboard Well-Known Member

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    I could hit 130 in 4 th gear on the 103 on the 07 WG I had built
  2. hotroadking

    hotroadking Super Moderator Staff Member

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    yeah but you'd be a 1/4 mile behind the 124...
  3. djl

    djl Active Member

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    How many miles on the 124 and how much does he want for he 124? Is he selling the complete engine?
  4. cardboard

    cardboard Well-Known Member

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    He has it on a 2000 model EG
    He said he us gonna sell the whole bike
    I don't know how much or when
    He has it at my Indy buddy shop
    Having some work done on the tranny
  5. hotroadking

    hotroadking Super Moderator Staff Member

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    124's love tranny's for lunch.


    Sent from my iPhone using Tapatalk
  6. cardboard

    cardboard Well-Known Member

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    Yep

    When you build motors too big. other parts seem to become weak.
    Then you spend even more money.
    Something else that has to be upgraded and folks don't think about it is brakes and clutch
    Another reason HD came out with the new frames.
    1st time they have upgraded their frames and a long time.
  7. Tommyc

    Tommyc Active Member

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    Stroke this: 8===D~
  8. Tommyc

    Tommyc Active Member

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    Did we determine the cause of the problem yet?
  9. MUDFLAP

    MUDFLAP New Member

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    Nope. I got a better dial indicator and arm setup. Remeasured the crank runout and it was .004". Was using a cheap flex-arm setup that wasnt all that stable.

    Had a buddy that works for Harley come over and check it too. He confirmed the .004" runout. Not sure whats making the bike vibrate in the RPM range stated in the first post.

    I'm at a lose. Still going to have the crank sent out when I got the extra cash tho.
  10. Tommyc

    Tommyc Active Member

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    Do you know about the issue with the cam tensioner shoes wearing out prematuely?
  11. HarleysLR

    HarleysLR Active Member

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    could be a motor mount loose or broken
  12. alex the dog

    alex the dog Active Member

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    There's a lot more 96 motor cranks out there than 88's because production volume was much higher. Yes you can use this crank in an 88, but you would have to replace pistons and you'd gain higher compression #'s.

    Just make sure the crank is statically balanced with the rods and pistons after welding journals--no more than 1-2 grams apart, and you will have a bullet-proof motor. By the way, I like Torrington bearings for eliminating horizontal drift, but I'll stand behind the INA bearings in terms of longevity.
  13. alex the dog

    alex the dog Active Member

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    Looking at your photos Mudflap, I'd say your pinion shaft is galled and looks shot. All this can be fixed, but the cost for another crank might be less.
  14. djl

    djl Active Member

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  15. Lucifer

    Lucifer Well-Known Member

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    I thought the only difference between an 88"&96" was the 96" had 3/8" longer stroke and off set pistons....:confused:
  16. MUDFLAP

    MUDFLAP New Member

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    Got the new Hydro cam plate. The shoes look brand new still. Motor has roughly 20K miles on it since the beef up in Dec of 09.


    Checked those when it started acting funny. All seems well.
  17. baggerpaul

    baggerpaul Well-Known Member

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    Mud flap go back to basics with this thing . spark fuel and compression . small changes in air fuel ratio . on a vee twin will make them vibrate like crazy . at lower rpm ranges . lets not forget that we have to share a single crank pin swinging both slugs at a 45 deg angle . and the balance factor starts to come in later in the rpm range . make sure the cylinder pressures are close to equal . within 10 psi at worse case scenario. i like them to be within 2 .but thats a perfect world . if you can check the cylinder three times in a row . i have seen seats seal sometimes and then not seal . check them after its hot just in case you have a seat coming loose from the head casting . also in you have o2 sensors. you can check data stream watching o2 sensor to see if you have one cylinder thats going lean . throwing the firing cycle off . and causeing a lean burn miss fire as rpm climbs injector fuel trim rises so it wont show the vibes as bad but at lower rpm it will . coming out of the hole the o2 will show above 850mv. as you roll the throttle . if you see them go lean under load . you can narrow down witch cylinder it is . if not both . you would be surprized how much the small things will cause a bike to vibrate bad . because of the state of tune .
  18. baggerpaul

    baggerpaul Well-Known Member

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    also one other thing 4 thousands run out . that aint bad at all ! the scars on the end of the crank look like debris scratches and so does the pump pics. not because the crank run out caused it , looks like some extra trash went in and out .of the pump. the vibes could be a sumping issue . if the wheels are swiming in oil the bike will vibrate like crazy!was the bushing inside the cam plate toast?or did it look like wear and tear?
  19. djl

    djl Active Member

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    Output shaft is different; different compensator configuration. Pistons are not really "offset" which typically indicates a pin offset perpendicular to the crank centerline. However the 96" pistons are a different location (higher) due to the crank pin being move outboard on the wheels .1875".

    The MoCo offers two "stroker" cranks for 88" cases; 4.375" and 4.625.
    Last edited: Nov 20, 2012
  20. MUDFLAP

    MUDFLAP New Member

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    Yeah. I got a canned map from fuelmoto. Aint got 02 sensors. Got a 06.

    I was going to do a compression check but didnt due to not having a compression checker. Guess I'll go get one tomorrow from auto zone or some place. Wouldnt hurt to check and I get to add another tool to the box, haha!! :D

    The plugs are really black which does indicate a rich condition.

    :banghead:

    I got things wrote out how I want to rebuild it if I really have too. I really dont want to but will if I really have to.

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