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Author Topic: Bench racing, design a frankenbike  (Read 314 times)

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Offline Don R

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Bench racing, design a frankenbike
« on: September 15, 2019, 08:34:52 am »
 If you had access to any sohc4 parts, original or vintage speed, what would you use to assemble your ideal bike?
  I have a 750A frame, a wrecked 75F for the rear brakes, 77K forks with double center bleeder calipers and rotors, a pair of decent A wheels, I'd love to use the F tank with an early rear hump seat but it doesn't fit the A frame so maybe a K frame with a Gordons or Franks kit.
 Any thoughts? A mix of road race frame and drag stuff? Superchargers, turbo's or Webers? I'm a big fan of bolt on mods more than cut and weld but anything goes.
 
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Offline turboguzzi

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Re: Bench racing, design a frankenbike
« Reply #1 on: September 15, 2019, 10:17:01 am »
ideal bike for what?  :)

Offline seanbarney41

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Re: Bench racing, design a frankenbike
« Reply #2 on: September 15, 2019, 01:32:32 pm »
I have done a lot of this...it's pretty easy to swap a lot of stuff, but there is almost always a tradeoff.  You just have to decide if the gain in one respect is worth the loss in another.
If it works good, it looks good...

Online 754

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Re: Bench racing, design a frankenbike
« Reply #3 on: September 15, 2019, 01:57:51 pm »
 I would go for better brakes, no pre 78 stuff..
 maybe a 41 or 43mm fork ..
Maker of the WELDLESS 750 Frame Kit
dodogas99@gmail.com
Kelowna B.C.       Canada

My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline seanbarney41

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Re: Bench racing, design a frankenbike
« Reply #4 on: September 15, 2019, 04:34:44 pm »
I wanna try to do a 750 with vf500f forks and swingarm and cbr600f2 wheels.  Forks are 38mm with dual opposed piston calipers...I think the trees use the same bearings.  Swingarm is beefy aluminum but will need to have dual shock mounts welded at least.  The wheel swap is easy but necessitated by the goofy sizes that the vf500f came with, 16" and 18" rear.  I don't think that 16" front would work very good on a cb750.
If it works good, it looks good...

Offline Don R

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Re: Bench racing, design a frankenbike
« Reply #5 on: September 15, 2019, 10:06:45 pm »
ideal bike for what?  :)
Ideal for your intended use.
If the things you own end up owning you, it's better to be owned by some cool things.

Offline Don R

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Re: Bench racing, design a frankenbike
« Reply #6 on: September 15, 2019, 10:24:45 pm »
 Don't get me wrong, I love a restoration and prefer them in most cases but some bikes are past the point of it making sense. Cutting up a nice original bike annoys me even though I did it myself way back.
 I was just thinking an A left behind a garage or in a fence row and an F that cartwheeled down a ditch 25 years ago but has a title might make a fun riding frankenbike and really confuse a few experts.
  A well done triple disc K0 automatic with spoked aluminum wheels and 4-4 mufflers might make me or others smile.
If the things you own end up owning you, it's better to be owned by some cool things.

Online 754

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Re: Bench racing, design a frankenbike
« Reply #7 on: September 15, 2019, 11:06:17 pm »
  Well personally I would like to do a KO streetracer, preferably a 69.  I have a set of cases already , 10,xxx, but would need a frame. . which could be  modded or cut already.. son it would not matter. Maybe a Ceriani fork , some cool old period stuff, big motor 970 or 1000 cc,  Webers, magneto , high pipes so it can be slammed..  just a dream right now.
Maker of the WELDLESS 750 Frame Kit
dodogas99@gmail.com
Kelowna B.C.       Canada

My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline turboguzzi

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Re: Bench racing, design a frankenbike
« Reply #8 on: September 16, 2019, 04:06:02 am »
ideal bike for what?  :)
Ideal for your intended use.
Use as a street bike+grab some attention then?

Hard to beat member's ilja little job :)





Offline Don R

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Re: Bench racing, design a frankenbike
« Reply #9 on: September 16, 2019, 08:10:04 am »
 That's some serious eye candy. I remember seeing a sohc 750 nighthawk too, that one is cool. 
If the things you own end up owning you, it's better to be owned by some cool things.

Offline Don R

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Re: Bench racing, design a frankenbike
« Reply #10 on: September 26, 2019, 07:37:52 pm »
 I began combining my F0 rear disc brake hub with an A rim and re-spoking an A front. I started to build this F years ago before realizing the frame was twisted, I was amazed to find new wheel bearings swimming in grease. I removed the swing arm and master cylinder from the f and will check for straightness. I'm comparing the frame to my A rear frame to see what to cut and weld. 
  The A brake shoes friction material peeled off when I removed the brake from the A rear. I noticed the A rear hub has the wider cush drive. I'll attempt to use it in the F0 hub for eventual big tire clearance. I'll pay a pro to remove the rear tire, then cut the rusty spokes, this rim still has the DID sticker on it.
 No idea what it will be when finished except triple discs, aluminum rims and the motor's top end will be removable in the frame. Not so fond of the A tank though.   
 
« Last Edit: September 27, 2019, 12:21:13 pm by Don R »
If the things you own end up owning you, it's better to be owned by some cool things.

 

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