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Author Topic: F and K engines interchangable?  (Read 2559 times)

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Offline DarkRider

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F and K engines interchangable?
« on: December 28, 2007, 08:22:19 AM »
I have a chance to get my old CB back in a way..only its just the engine since the chassis was scrapped months ago. Im just trying to figure out now what to do with this K4 mill..other then the obvious sell it lol. I would like to drop it into another chassis and return it to being a CB. However..i wouldnt mind getting ahold of a later F chassis with the comstar wheels. But im not sure if the K engine just bolts into the chassis though. Otherwise i wouldnt mind building something like Dusthawks bike. Im willing to hear all ideas on this one...
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'84 Chevy C10
'73 MGB Roadster
'69 Ford F250

Currently a rider without a bike

Quote from: heffay
so, you say just tie myself on with this... and steer w/ this?   ;D ;D  ok.  where's my goggles?   8)

Offline Hope

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Re: F and K engines interchangable?
« Reply #1 on: December 28, 2007, 08:24:50 AM »
I assume you're talking about a 750.  I don't know why the motors wouldn't interchange.
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Offline cbass*gxc

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Re: F and K engines interchangable?
« Reply #2 on: December 28, 2007, 08:31:48 AM »
Outlaw if you need a 750 frame I have an extra one in my garage.  Not exactly sure what year and model but if you want it you can have it.  I will get the info on it when I get off work if you are interested.
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Offline bryanj

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Re: F and K engines interchangable?
« Reply #3 on: December 28, 2007, 08:40:19 AM »
All the engine mountings are the same on all sohc 750 but some of the "extras" mountings (electric panel; exhaust; airbox; etc) may or may not be different
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Offline 754

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Re: F and K engines interchangable?
« Reply #4 on: December 28, 2007, 10:04:36 AM »
Make sre you use the right sprocket carrier and you will be fine..
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Offline DarkRider

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Re: F and K engines interchangable?
« Reply #5 on: December 28, 2007, 10:34:48 AM »
Quote from: cbass*gxc on December 28, 2007, 08:31:48 AM
Outlaw if you need a 750 frame I have an extra one in my garage.  Not exactly sure what year and model but if you want it you can have it.  I will get the info on it when I get off work if you are interested.

Def interested in the frame man. Not sure how much it will cost to ship to canada but we can figure it out soon enough.
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'84 Chevy C10
'73 MGB Roadster
'69 Ford F250

Currently a rider without a bike

Quote from: heffay
so, you say just tie myself on with this... and steer w/ this?   ;D ;D  ok.  where's my goggles?   8)

Offline cbass*gxc

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Re: F and K engines interchangable?
« Reply #6 on: December 28, 2007, 10:45:02 AM »
Ya just let me know.  It is sitting in my garage taking up space.  The guy that I bought my bike from just gave me the frame when I bought my bike.  The frame does not have a title though.
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Offline DarkRider

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Re: F and K engines interchangable?
« Reply #7 on: December 28, 2007, 11:42:45 AM »
alright man..i may need you to pm the frames vin so i can get it checked for being clear...all i really need is a bill of sale in canada if im not mistaken. Also would like to know what model of frame it is so i can search for the rest of the parts accordingly..
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'84 Chevy C10
'73 MGB Roadster
'69 Ford F250

Currently a rider without a bike

Quote from: heffay
so, you say just tie myself on with this... and steer w/ this?   ;D ;D  ok.  where's my goggles?   8)

Offline cbass*gxc

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Re: F and K engines interchangable?
« Reply #8 on: December 28, 2007, 12:45:01 PM »
I will get you all the info off the plate when I get home.
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Offline DarkRider

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Re: F and K engines interchangable?
« Reply #9 on: December 28, 2007, 01:01:11 PM »
Quote from: cbass*gxc on December 28, 2007, 12:45:01 PM
I will get you all the info off the plate when I get home.

Thanx man
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'84 Chevy C10
'73 MGB Roadster
'69 Ford F250

Currently a rider without a bike

Quote from: heffay
so, you say just tie myself on with this... and steer w/ this?   ;D ;D  ok.  where's my goggles?   8)

Offline cbass*gxc

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Re: F and K engines interchangable?
« Reply #10 on: December 28, 2007, 04:25:22 PM »
Outlaw I told you wrong.  This is actually a 650 frame.  Sorry I thought it was a 750 but never looked.  If you still want it you can have it.  Here are the numbers

1980 CB650C
MF Date 12/79
VIN -- RC05-2014323
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Offline DarkRider

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Re: F and K engines interchangable?
« Reply #11 on: December 28, 2007, 04:28:35 PM »
anyone know if i can mount the 750 engine into this frame?
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'84 Chevy C10
'73 MGB Roadster
'69 Ford F250

Currently a rider without a bike

Quote from: heffay
so, you say just tie myself on with this... and steer w/ this?   ;D ;D  ok.  where's my goggles?   8)

Offline cbass*gxc

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Re: F and K engines interchangable?
« Reply #12 on: December 28, 2007, 04:31:13 PM »
I can take some pics of it if you would like?
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Offline DarkRider

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Re: F and K engines interchangable?
« Reply #13 on: December 29, 2007, 05:57:28 PM »
Quote from: cbass*gxc on December 28, 2007, 04:31:13 PM
I can take some pics of it if you would like?

That may be best. Chances are if the engine will fit inside the 650 frame i may just go that route. Which will allow me to use it as a base to build a bobber project.
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'84 Chevy C10
'73 MGB Roadster
'69 Ford F250

Currently a rider without a bike

Quote from: heffay
so, you say just tie myself on with this... and steer w/ this?   ;D ;D  ok.  where's my goggles?   8)

Offline paulages

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Re: F and K engines interchangable?
« Reply #14 on: December 30, 2007, 10:58:57 AM »
a 750 engine will not fit into a 650 frame.
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paul
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1976 CB550 (590cc) road racer
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EraZor

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Re: F and K engines interchangable?
« Reply #15 on: December 31, 2007, 05:10:51 AM »
500, 550 and 650 engines ar interchangeable without (many) issues. 750 engines are interchangeable, but bear in mind that the different types do have different gear ratios and that the K7/F2 (and presumably the F3 and K8) front sprockets have another offset than than the other engines (Don't know for sure 'bout the F1 engine). Therefore the front and rear sprocket don't align properly, which causes the chain to very rapidly wear out.... Just mounting the engine is no problem whatsoever.
« Last Edit: December 31, 2007, 05:15:07 AM by EraZor »
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