Reasons not to rephase...

acebars

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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?
 
Reliability is king with me. Stock innards are proven for reliability. I am slowly replacing or repairing the unreliable parts.
$0.02
 
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*
 
What are the pros and cons of rephasing? Is it simply something for racing? Does it increase bhp, torque?

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.
 
As long as nobody does it because they've come to believe it's necessary before it's ridable...
 
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.
 
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.
 
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.
 
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.
jefft
 
hands ever go numb after a 50-60 mile ride at 70mph ????

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

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'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.

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:

Hugh
 
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.
 
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.

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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