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Author Topic: cb 750 engine numbers  (Read 769 times)

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Offline zoom74cb

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  • 1974 cb 750 2002 dyna FXDX . 2001 fxdx t sport
cb 750 engine numbers
« on: December 07, 2012, 02:50:27 PM »
Hi all!!  I need some help with some engine numbers..I know that for cars the motor numbers match the the vin if it is original..When i bought my 750 K4 the motor that was in it ran well but had the crack in the case from the chain...(thanks PO). But i got and extra motor and some other parts as well ...all for  600 bucks. I am not sure the motor in it is original. The numbers are different. Can anyone tell me what i have here??  pics are from the two motors ..and my vin plate on frame.
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Offline ekpent

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Re: cb 750 engine numbers
« Reply #1 on: December 07, 2012, 03:07:35 PM »
This is a popular timeline a lot of us use. Handy to take with you if you go look at a bike also. Can your old case be repaired possibly with JB or welding ?   http://www.hondachopper.com/engine/engine_timeline/timeline.html
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Offline zoom74cb

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  • 1974 cb 750 2002 dyna FXDX . 2001 fxdx t sport
Re: cb 750 engine numbers
« Reply #2 on: December 07, 2012, 03:52:26 PM »
Thanks for the timeline link...should come in handy. The motor just has a crack, not a hole ..so i think itcan be repaired(welded) pretty easily.  Not sure if i am going to rebuild this engine or use the other one i have. Leaning towards the other one which may have lower miles..But uncertainty of history may require inspecting BOTH inside and out to see which one would be better
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Offline cbr954

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Re: cb 750 engine numbers
« Reply #3 on: December 07, 2012, 04:26:14 PM »
The numbers between the frame and engine don't match from the factory.  They each have there own number.
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03 CBR954RR, 72 750 chopper(970cc
F2 head), 2017 CRF450R, 2001 CR250R, 72 CB500, 79 XR250, 04 CRF50,70's soon to be rebuilt cb750 drag bike.

Offline Xnavylfr

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Re: cb 750 engine numbers
« Reply #4 on: December 08, 2012, 05:32:45 PM »
You don't even have to worry about the engine  when it comes to registration UNLESS your state requires engine # also on title!!!  On some engines you could find UN-NUMBERED cases because they were replacements back when they were still available.  Good info to have #s so you get an idea of year of MFG of engine.
Unless you are the original owner of the bike, that engine could have been changed a couple of time in over 30 years!!


Xnavylfr(CHUCK)
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