Important Harley twin cam info

Discussion in 'Road Warriors' started by YOUNZ, Nov 14, 2012.

  1. Bueller

    Bueller Cashin?

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    :photog :lol3
  2. Ginger Beard

    Ginger Beard I have no soul

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    :huh Really? Nobody? Not ONE person? This thread is covered in absolute awesome sauce!! :lol3
  3. Tepi

    Tepi Been here awhile

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    How much longer should they last? I mean theres harley engines from 20's still running just fine, doesnt get much better than that. How many japanese bikes from that era are still running, oh right they didnt make bikes back then.
  4. EetsOK

    EetsOK Been here awhile

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    Stuff was made to last back in the 20's regardless who made it.
    HD having issues with he TC's is more a statement of our throw away society than ability to engineer and make something to last.
    All these bikes today with their fancy electronics, how many will be running in 20, 30, 50 years or longer?
    Not a fair comparison.
  5. JerryH

    JerryH Long timer

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    Most Japanese engines COULD last forever, if they were designed to be rebuilt, and IF parts were available. I would love to get into vintage Japanese bikes (unless it became super expensive) but their not being easily rebuildable and with almost NO parts being available, it's pretty difficult to keep one running. I had to fabricate some of my own parts for my former 1985 Honda Goldwing, a fairly new bike. I also had to buy a lot of used parts. The fuel pump came from a Honda Civic.

    I AM NOT a Harley basher. In fact I love them, and hope to someday be able to ride something besides a Sportster. But I am not a fan of the twin cam design. Just too many things to go wrong, and no real improvement. Automatic cam chain tensioners fail on a regular basis on ALL bikes. Vulcan 750 cam chain tensioners tend to fail at around 10-12,000 miles. So you have to keep replacing them, or do what I did, and switch to aftermarket manual tensioners

    As for their single crankpin 45 degree layout, it is seriously out of balance, and puts a tremendous amount of stress on all the engine parts. A Harley engine would likely last twice as long if they did it Honda's way, and used staggered crankpins to give perfect primary balance. The engines wouldn't vibrate, and they would sound like a lawnmower. But they would hold together a lot longer before needing to be rebuilt.

    But I can guarantee that if Harley did it this way, they would be out of business in a very short time. Those who want smooth quiet bikes can get them from the Japanese.


    As for today's "throw away" culture, I've been complaining about that since I was a teenager. It is a sad thing indeed. Most Japanese dealers won't even look up parts for a bike more than 10 years old. Electronics? I've never owned a bike with electronics, yet they all seemed to run just fine. How are electronics an improvement? Using technology just because it is there and not because it serves a purpose and makes the product better just doesn't make sense.
  6. blackSP

    blackSP 62 6c 61 63 6b 53 50

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    Jerry, Jerry,

    Even I start to feel sorry for you, having to live in these modern throw away times.
    I saw one of these on eBay just a few days ago, maybe that would get you all excited?
    It definitely qualifies as 'low tech' and must appeal to you!


    [​IMG]
  7. EetsOK

    EetsOK Been here awhile

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    What a load of crap that is Jerry.
    Ever hear of cylinder relining? Machine shops? Lathes? If you can't find it, make it. The myth of japanese engines not being rebuildable is just that...a myth. Ever pick up a non-HD classic/vintage motorcycle magazine? The problem with guys like you, is that the Japanese engines are more complex and sometimes you got to make a few bits at home with a lathe etc. Just like the peopel that restore pre WW1 motorcycles. The name on the tank is no indication of whether it is rebuildable or not.

    "Using technology just because it is there and not because it serves a purpose and makes the product better just doesn't make sense"

    You see you can say something intellegent if you try hard enough.
  8. bikeridermark

    bikeridermark Long timer

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    Jerry, what do you actually RIDE? Do you even own a bike? Or do you just troll?
    Harley engines, they last a LONG time.
  9. Bueller

    Bueller Cashin?

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    But no, they use a 1970's timing chain and are, like, chemically imbalanced or something.
  10. Ginger Beard

    Ginger Beard I have no soul

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    Funny you say that. The guys at the local mc parts store made a comment about me always riding my Sportster to pick up parts for my Jap bikes. One guy asked why I never get anything for the Sportster and I simply said "It never seems to need anything." It's honestly been one of the most reliable bikes I have owned.
  11. DAKEZ

    DAKEZ Long timer

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    AGAIN this is OLD news. It was something that was noted, acknowledged and addressed in 2006. :deal
  12. EetsOK

    EetsOK Been here awhile

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    Huh? Jerry says you can't fix Japanese bikes?:huh
  13. anotherguy

    anotherguy unsympathetic

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    The ignorance in this thread rivals that at a fucking Klan meeting. So what Jiffy Lube do you work at Jerry?:rofl
  14. bikeridermark

    bikeridermark Long timer

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    Jerry's Bike.......

    [​IMG]

    OOOOPS! It's got a chain! It's junk!
  15. JerryH

    JerryH Long timer

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    I wish I worked at Jiffy Lube, except for the number of times they were caught ripping people off. I would much rather do oil changes all day than work on vehicle electronics, which I was promoted into a few years ago. Unfortunately doing oil changes does not pay enough. I am 53, and plan to retire at 55. I have the resources to do it because I made some smart (and lucky) financial decisions a long time ago. I plan into getting into working on vintage cars when I retire, something I have been doing on the side for many years.

    Go to bikebandit.com, or cheapcycleparts.com, and look for parts for a 30 year old Japanese bike. They almost do not exist. You may find a few fairly common parts. Yes you can make some of them, I have. Now go look for parts for a 30 year old Harley. You can throw a rock in any direction and hit someone selling them.

    Harley engines are seriously out of balance. The 315 degree and 405 degree firing intervals are what create this imbalance. That is what makes Harley engines shake so much, and try to tear themselves apart. But it is also the reason why they make such a great sounding noise, and the aforementioned shaking people like so much.

    You would be very lucky to get 100,000 miles out of an assembly line built Harley engine, yet Goldwing engines routinely go more than 300,000 miles, are quiet, and smooth as silk. Considering the number of Goldwing owners out there, including me, many people do indeed like this. But not from Harley. The new Goldwing FB6 gives the Goldwing a cruiser (but not Harley) look, while maintaining that smooth quiet engine. It will be interesting to see how it sells.

    For the record, I own and ride the following motorcycles, scooters, and mopeds. You will notice there are no Harleys, but I do have immediate plans to add a Sportster to my collection. If I can swing it, I might go for an EVO, preferably a SuperGlide.

    1995 Goldwing (I have put 39,000 miles on it since buying it used)
    1994 XT225
    2002 Vulcan 750 (74,000+ miles, all mine)
    2009 Stella 2 stroke
    2008 Vino 125 (20,000+ miles, all mine)
    1977 Puch MaxiSport II moped
    1971 VeloSolex S3800
  16. EetsOK

    EetsOK Been here awhile

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    Jerry I thought you were done here?
  17. Bueller

    Bueller Cashin?

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    I'd remind you again that you said you were leaving this thread, but with each new post of yours I become more and more convinced you are here for no other reason than to broadcast to everyone about your alleged madd skillz and accomplishments in life.

    Since it's already been proven that you don't know what the hell you are talking about it should go without saying that you aren't impressing anyone.

    Go away.
  18. Gerg

    Gerg Gergy Bear

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    And you're a mechanic? They made you an electricial guy because you were too untrainable as a mechanical mechanic.

    In as few words as possible please explain how you can get a 315 degree and a 405 degree firing order on an engine with a comon crank pin and cylinders at 45 degrees apart? With your logic, where the hell is TDC and which jug is the #1 cylinder?

    Also, by your logic, a single cylinder can't exist because it'll shake itself apart.

    Gerg
  19. ragtoplvr

    ragtoplvr Long timer

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    everything,even gold wings and Harley's has issues. Every mechanical issue can be fixed, human issues not so much. There are so many Harley fans, so may suppliers, so much stuff, that every issue is only a chance to make it better.

    You want one, get it, maintain it, make it better and have fun. You want a GW, then do the same.

    Insult another mans ride, not in fun but serious, then don't be surprised if they get pissed and don't play nice.

    Rod
  20. Bueller

    Bueller Cashin?

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    He's using crankshaft degrees, not camshaft degrees. Basically, if cylinder # 1 fires, the next cylinder will fire in 315 degrees of crank rotation. After that it is another 405 degrees until cylinder #1 fires again.