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Author Topic: FRANKENHONDA II the 1982 DOHC CB 750F2 Build  (Read 85125 times)

Offline cb250nproject

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Re: FRANKENHONDA II the 1982 DOHC CB 750F2 Build
« Reply #590 on: Dec 31, 2018, 00:54:42 »
Just out of curiosity, did you drill the front or is that stock for that rotor?  I don't see any chamfering on the holes for the front disk.  Just wondering if that was intentional or not.  Unless I just can't see it in the pic.

That’s how it came out of the box, there is no chamfering. My R1 discs are the same


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first cafe build was an incomplete learning experience, more of a test run for the real thing FRANKENHONDA II

Offline stroker crazy

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Re: FRANKENHONDA II the 1982 DOHC CB 750F2 Build
« Reply #591 on: Dec 31, 2018, 01:51:47 »
there is no chamfering.

Chamfering is not a good idea ...
“Ride like the Wind” W.H.

Offline cb250nproject

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Re: FRANKENHONDA II the 1982 DOHC CB 750F2 Build
« Reply #592 on: Dec 31, 2018, 18:33:38 »
Chamfering is not a good idea ...

100% agreed


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first cafe build was an incomplete learning experience, more of a test run for the real thing FRANKENHONDA II

Offline irk miller

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Re: FRANKENHONDA II the 1982 DOHC CB 750F2 Build
« Reply #593 on: Dec 31, 2018, 21:00:24 »
Depends.  Chamfering provides better cooling, while the hard edge gives you better bite.  Any hard edge becomes a hot spot.  Even the points on a chamfer create hot spots, but they are spread.  The optimal cooling edge is more like a rounded fillet- a sinusoidal edge.



I don't think motorcycles or street cars have nearly the cooling needs, so probably makes the most sense to go chamfer free.

Offline cb250nproject

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Re: FRANKENHONDA II the 1982 DOHC CB 750F2 Build
« Reply #594 on: Jan 02, 2019, 04:02:30 »
Dropped the barrels, rocker cover, starter motor cover and the chain guard cover off at the hydro blasters

Dads finished measuring up the original top triple clamp. Now will come the next adventure, fabricating the top triple.




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first cafe build was an incomplete learning experience, more of a test run for the real thing FRANKENHONDA II

Offline cb250nproject

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Re: FRANKENHONDA II the 1982 DOHC CB 750F2 Build
« Reply #595 on: Jan 03, 2019, 18:33:39 »
So some updates from old man Murphy’s shed

The main holes have been done, still the slot for the idiot lights. Then it will come down to the shaping.

The temperature is tipped to be 43 c, so I think we may have to standby for fear of dad being barbecued in the shed.




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first cafe build was an incomplete learning experience, more of a test run for the real thing FRANKENHONDA II

Offline Jimbonaut

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Re: FRANKENHONDA II the 1982 DOHC CB 750F2 Build
« Reply #596 on: Jan 03, 2019, 18:39:15 »
Useful bugger that old man Murphy...

43 degrees?  Damn, I was enjoying this thread up to that point.  Now I hate you and your *&^% bike.

 ;)
"I'm telling you Donnie, nuthin' but nuthin' but right"

Offline teazer

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Re: FRANKENHONDA II the 1982 DOHC CB 750F2 Build
« Reply #597 on: Jan 03, 2019, 19:52:51 »
That's 43 Centigrade or around 112F and in his shed it's probably over 120 degrees. Way TF too hot.

Offline Jimbonaut

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Re: FRANKENHONDA II the 1982 DOHC CB 750F2 Build
« Reply #598 on: Jan 03, 2019, 20:12:47 »
I know, and I'd take it in a heartbeat.  Minus god-knows-what here and cold as a witch's tit.  My mate says he likes this weather - he can go for a walk in the park with an ice cream cone, have a couple of licks, put it down on the bench and come back to it after a couple of minutes, no drama.  Glass half full that guy.
"I'm telling you Donnie, nuthin' but nuthin' but right"

Offline stroker crazy

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Re: FRANKENHONDA II the 1982 DOHC CB 750F2 Build
« Reply #599 on: Jan 03, 2019, 20:21:04 »
The temperature is tipped to be 43 c, so I think we may have to standby for fear of dad being barbecued in the shed.

Tipped to drop by about 20oC on Saturday ...
“Ride like the Wind” W.H.