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Reasons not to rephase...

Discussion in 'The Garage' started by acebars, Oct 1, 2013.

  1. acebars

    acebars XS650 Addict

    I'm thinking of dropping a 533 crank in my 256 engine eventually.

    I know what rephasing is and that its all the rage at the moment, but I can think of some reasons why I personally wouldn't want to:

    -The even firing sound of a parallel twin
    -The pleasant vibrations a parallel twin makes (giving it old school authenticity) :D.

    What are the pros and cons of rephasing? Is it simply something for racing? Does it increase bhp, torque?
  2. I think the 360 is a great motor. I could never figure out what the whining about the vibration is all about.
  3. nj1639

    nj1639 Paleo-simplistic Top Contributor

    Love the sound of our stock twins, I'll dance with what brought me here.......
  4. jd750ace

    jd750ace Front Toward Enemy

    Reliability is king with me. Stock innards are proven for reliability. I am slowly replacing or repairing the unreliable parts.
  5. They don't even vibrate that bad stock. If the carbs and timing are proper. Although compared to the KZ650 I had....its real bad., haha. But yeah, I wont rephase. I like the 360*
  6. mrriggs

    mrriggs XS650 Junkie

    I don't know of any racers who re-phase.

    In my opinion, the only reason to re-phase is if you prefer the sound of a re-phased engine.
  7. hands ever go numb after a 50-60 mile ride at 70mph ????
  8. gggGary

    gggGary When a whole one is just too much. XS650.com Supporter Top Contributor

    no.. not mine
  9. xjwmx

    xjwmx It's just the unknown. Top Contributor

    As long as nobody does it because they've come to believe it's necessary before it's ridable...
  10. retiredgentleman

    retiredgentleman XS650 Guru Top Contributor

    My stock 360 degree engine works extremely well.....................I can't see any reason why one would want to change. Very little vibration on my bike..................2000 km trips are very enjoyable.
  11. tadd442

    tadd442 dude.....

    I've watched most, if not all of Hugh's vids. Granted, he is also running 750 jugs, but I've NEVER seen a 360 degree motor accelerate like his bikes...I dig the stock set up as much as the rephase...it's just what I've seen.
  12. jamesgs4

    jamesgs4 fuck this, let's ride!

    The price of a rephase and related parts is why my chop won't get a rephase. I have a 256 motor and Pamco, so I am not going to spend the money to convert the internals and buy a new Pamco. Plus, it runs great and smooth as it is. My cafe bike will prob get a rephase and a 277 Pamco kit after I get it running.
  13. I am Carbon

    I am Carbon shade tree mechanic XS650.com Supporter

    I will have to say this is why I am going to get a rephrase.
    I have to go inside to get crank fixed anyway.
  14. jefft

    jefft XS650 Junkie

    I think I might get a Big Bore from Mikes and call it good. It looks like a rephase can get real expensive (although I realize the skill and labor involved), especially if you are going to have someone else rebuild your engine. I just can't bring myself to spending that much on a bike I picked up for $250. I'm do not intend to ride across the country on mine so the vibes aren't going to be that big a deal to me.
  15. willyguzzi53

    willyguzzi53 XS650 Addict

    For some reason, maybe just dumb luck, my stock unrestored '73 is noticeably smoother at 70 than it is at 55. Somewhere just north of 4,000 rpm it just settles in and smooths out. What I'm interested in is a big bang motor. Anyone out there have one?
  16. Bigfeet

    Bigfeet to many projects

    I thought about that as well. I've never heard of Shell Thuet rephasing a motor although he may have. I would have to agree about liking the sound of a rephase.
  17. Punkskalar

    Punkskalar Hugh's HandBuilt

    I do - but most of them aren't sharing it out in the open, winning riders don't give away all their secrets :D

    I'm building quite a few "stock" 650 rephased engines as well lately, putting one in my personal next build with nothing more than VM34's and Free Breathing pipes - after riding Tevan's Resto-Mod XS2 with Rephased but otherwise stock internals, I fell in love with it... :thumbsup:

    It's not a mod for everyone, and I never try to "sell" it to anyone either, as nobody likes a salesman :laugh::laugh:

    But, if anyone is ever at an event or in the area while we are, we offer "Free 277 Test Rides" - and haven't had a disbeliever yet :bike:

    Silverguy80 likes this.
  18. Downeaster

    Downeaster Everything in XS Top Contributor

    So, just out of morbid curiosity, what would it cost to rephase a running engine in good shape? This is assuming it would need nothing more than a honing and rings, all existing internals could be reused and it would just need the rephase and the PAMCO updated.

    Ballpark figure, say to the nearest $100, not including shipping.
  19. Punkskalar

    Punkskalar Hugh's HandBuilt

    DIY with new gaskets and seals ($100 or so) and using an HHB Rephased Crank and Cam Service, you could get away with $485.00 for the Rephase Exchange Services, $100 for the seals and gaskets, all new Pamco ignition for $250 or so and be good to go.

    So if everything was in great shape, and you did the labor yourself you could do it for $735-800. If you already had a good ignition (pamco, boyer) you could sell it off and save even more cash on the grand total.

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