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Author Topic: Frankenbike?  (Read 1944 times)

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Midlife750

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Frankenbike?
« on: June 21, 2005, 04:17:55 AM »
Hi All,

   Just a few questions for the numbers guru's  ???  I just bought a '76 CB750 for a paltry 150 bucks, but was baffled by the numbers... Is this a bike made from 2? A check of the frame and engine numbers chart still left me wondering, as the numbers don't seem to fit... The numbers are... Engine: CB750E 2520172 (K motor??) and the Frame: CB750F 2004951, (mfg. 5/75). Is this an F or K model?... the remains of color on the underside of the tank look to be sulfur yellow.... , but shouldn't the motor be CB750FE, as in F model bikes?

Also, what are the cues to look for on a super sport model? this bike has spokes and both front and rear disc brakes... ??? What is the HP output of this motor vs. a super sport, or is there no real difference?

Any answers would be great..

(sorry for the dumb questions, but, as the name implies, I haven't been on a bike in 15 years.. **LOL**)

All the best!
Mike
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Offline Steve F

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Re: Frankenbike?
« Reply #1 on: June 21, 2005, 05:02:03 AM »
Mike,
On both of my 750F's, the engine didn't have an "F" anywhere in the serial number.  The frame definately is an "F" model.
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Offline bryanj

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Re: Frankenbike?
« Reply #2 on: June 21, 2005, 05:38:59 AM »
1976 cb 750f frame numbers start atCB750F 2000003 and engines at CB750E 2515094 colours Sulphur yellow or Candy antares Red (US  only) Spoked wheels single disc F & R 4 into 1 exhaust
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Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

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Midlife750

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Re: Frankenbike?
« Reply #3 on: June 21, 2005, 05:51:21 AM »
Thanks for the replies! So it is officially an F model.. does this designation signify a super sport model? (BTW this is good info, as I found JC whitney offers plastic side covers for 24.00 each, but I needed to know for sure if it was an F or a K... cool!!)


Regards,
Mike
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Offline MRieck

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Re: Frankenbike?
« Reply #4 on: June 21, 2005, 06:39:53 AM »
Those covers are for the F BUT the mounting system is different. Come to think of it Dzuz fastners wouldn't be a bad idea with them. As for horsepower 50 to 55 depending on state of tune and mileage.
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Owner of the "Million Dollar CB"

Offline MikeDeB

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Re: Frankenbike?
« Reply #5 on: June 21, 2005, 11:40:31 AM »
David Silver Spares has direct replacement (pattern) sidecovers for both the K and F and they use the stock mounting system.
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Mike (Old SOHC/4 #2641)
Holt, MI
71 CB750K1
72 CB750K2
72 CB100K2
97 Ducati 900 SS/SP w/FCRs
98 Ducati 750 Monster w/FCRs
80 SR500

"Growing older is inevitable, growing up is an option."

eldar

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Re: Frankenbike?
« Reply #6 on: June 21, 2005, 01:11:46 PM »
I would not mind stock covers but I like the bolt on mounting. Never have to worry about a cover coming off by accident and it makes theem more difficult for some ass to steal them. They still can yes but they have to unscrew 3 bolts which takes longer than poping 3 little posts.
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