Author Topic: K Code vs. F code (Read 4143 times)

walkingchaos · « **on:** September 25, 2008, 04:48:13 PM »

hey guys,
Ok so im a newb so go easy on me. Im starting my first bike project. Id like to do a cafe racer. Ive been reading as much as I can on these forums and have learned alot but now i need to start asking questions.

I purchased a 73' CB750, complete in running condition if a little rough. I also got a 76' frame which i found out is an F Code frame. I tore the bike down over the last few days and found the usual maintenance and need to fix list but Im now considering swapping everything to the F Code frame. Here come the questions :

1) What is the difference between the F code and K code frames?
2) Is there any benefit or loss to using one frame or the other ?
3) I have a broken rear strut mount stud on the K code bike, better to fix or use the other frame ? (this was where the idea came from to swap frames)

See if I can (should) use the F code frame then i can work on it more easily, cut off the rear pegs, media blast it, powder coat it . . . all while still having a rolling frame with my motor and all. The seat i purchased seems to fit the F code frame better. . . not sure why. Anyway you guys seem to really know your stuff and any input would be appreciated.
thanks -adam-

fuzzybutt · « **Reply #1 on:** September 25, 2008, 06:02:49 PM »

i'd just repair the stud on the 750k frameif it was mine. as far as i know the f bike frames had more trail in the front end making for slightly heavier steering, theyre also heavier than the k frame i believe. the fuel tanks dont interchange, the seats dont interchange as well as the side covers.

walkingchaos · « **Reply #2 on:** September 25, 2008, 06:34:52 PM »

ok . . . I was gonna use the front end from the K bike, would that make any diff ? I know the stock seat doesnt fit but im using a custom seat so thats not an issue. the side panels are busted so i have to buy new ones anyway. I tried test fitting the tank and it seemed to fit, which part wouldnt work out ?

Is there anything major that wont swap from one frame to the other ? I have a slight alterior motive here . . . i have a title for the F code bike . . . dont have one for the K bike. Mass is a bit nuts about titles.

KB02 · « **Reply #3 on:** September 25, 2008, 07:05:58 PM »

Tanks will swap. Sometimes different directions are easier than others, but it can be done.

walkingchaos · « **Reply #4 on:** September 25, 2008, 07:16:41 PM »

what difficulties might i face trying to use my K tank on the F frame ?

fuzzybutt · « **Reply #5 on:** September 25, 2008, 08:06:35 PM »

it's shorter

SOHC4 Cafe Racer Fan · « **Reply #6 on:** September 25, 2008, 09:38:25 PM »

Depending on your state's dmv, you may have some difficulty getting title for the new Franken-bike. In California, if the engine year codes don't match the VIN year numbers, you are supposed to register the bike as an "other" rather than the model year of the frame or engine -- essentially a kit bike. Also if the F frame is not titled, you may (in California you will) need to have your new Franken-bike safety inspected by the dmv or highway patrol, before getting new title and registration. Just something to consider if your state dmv does this.

walkingchaos · « **Reply #7 on:** September 25, 2008, 09:42:25 PM »

i might have no choice, i have no title for the K code bike

ericstew · « **Reply #8 on:** September 26, 2008, 05:24:09 AM »

Hello,

I've the same problem as I wanted to build a cafe racer with a K2 look and a F frame.
It appears that:
gas tank fit
oil tank doesn't fit
side panel doesnt fit
seat doesnt fit
You have a rear brake disk on the F.
for the rest,wiring is different(fuse block) but you can use the K one the F (you will have to change the battery holder,lights panel,and the hand controls.

walkingchaos · « **Reply #9 on:** September 26, 2008, 08:35:46 AM »

damn the oil tank is the one thing i hadnt thought of . . . . now how the heck can i fix that issue.

bryanj · « **Reply #10 on:** September 26, 2008, 08:54:04 AM »

It can be made to fit if you have a grinder and welder to move the mounting points on the frame----same with side cover mouting holes.

Forks will fit, its the head angle thats different, and you can fit the swing arm from the K to keep the drum brake---you may have to alter the pedal mounting as well, not sure havent looked that close.

Brackets and mouting poits for exhaust ext can be in different places but if you are modding/painting the frame then go for it

walkingchaos · « **Reply #11 on:** September 26, 2008, 09:28:46 AM »

hmm getting a bit more complicated then i had originally thought . . . but im still stuck with the fact that i only have a title for the F code frame, so more or less im going to be making a frankenbike no matter what i do. Damn now im not sure what to do. I have the complete K bike the only issue is the rear strut mount stud . . . maybe ill just fix that. ideas on how ?

walkingchaos · « **Reply #12 on:** September 26, 2008, 03:30:27 PM »

ok looked at it some more and i see what youre talking about with the brake. No pedal on the F bike means no mounting point for the K bikes pedal. It looks just like a 2 inch long piece of round stock welded to the bottom of the frame though which should be easy enough to duplicate. does anyone know if theres any kind of bearings in there ?

walkingchaos · « **Reply #13 on:** September 27, 2008, 09:14:29 AM »

anyone ? has anyone taken that rake pedal apart ?

Soos · « **Reply #14 on:** September 27, 2008, 11:40:59 AM »

Have you though of trying for a "lack of information title"?

It's pretty cheap to do, but it takes time, and if the frame ends up stolen, then you better be willing and able to produce a bill of sale for the nice officers.

Basically you fill out the paperwork, send it in.
They try to contact the PO.
If the PO says they sold it to who you bought it from(or to you) alls good, 15.00 title.
If the PO has died, 15.00 title, all good.
If they cannot track down the owner(3 months wait time later) 15.00 title.

If it's in the stolen bike registyr, or the PO says it was stolen.
they take the frame away, and quite possibly any all parts related to that frame.

Not sure, the only "lack of info title" I have applied for went smoothly.
took almost 4 months.
but 15.00 for a title to a frame is cheap.

l8r

Soos · « **Reply #15 on:** September 27, 2008, 11:43:41 AM »

BTW I live in utah, not too sure if they have the "lack of information title" procedure/paperwork available in all states though.

l8r

P.S. the DMV would not tell me about this process to get a lost/missing title.
However when I asked for this paperwork, they printed one off for me without question.

walkingchaos · « **Reply #16 on:** September 27, 2008, 01:05:49 PM »

hmm wow never heard of that, i will def go down to the DMV and check it out in my state. I live in MA and they are real bastards about paperwork and titles. From what ive heard just 20 miles away in RI you can have a piece of toilet paper with a sale amount and an X mark made by the seller and youre golden . . . i hate this state sometimes.

754 · « **Reply #17 on:** September 28, 2008, 10:18:05 PM »

Put an ad in the paper,
Wanted Honda 750 with Title, 78 or older, need not be running.

You may be pleasantly surprised with the choices that could offer you..

walkingchaos · « **Reply #18 on:** September 29, 2008, 12:49:33 PM »

ya thats pretty much why i got the F frame, its got a clean title. I think ill just tell them its a project bike and the majority of the stuff is from that bike.

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Author Topic: K Code vs. F code (Read 4143 times)

fuzzybutt

fuzzybutt