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Author Topic: CB750 Cut front Fender  (Read 6607 times)

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Offline AshimotoK0

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CB750 Cut front Fender
« on: May 14, 2009, 01:04:24 PM »
The double-cut front fender on my K0 (diecast) is beyond repair I think, so I bought a new 'rolled front' one from Silvers. But on a bike which, apart from this, will be original '69 it's going to be an obvious 'snagging point'. Has anyone ever tried cutting two sections off a fender and butt welding them underneath the stays to create a cut style K0 fender (after re-chroming that is). The weld line would be under the stays and thus hard to notice. Or am I talking rubbish? I know Yamiya sell new one but they cost around 700GBP I think. I don't suppose Honda will ever make them available again for health and safety reasons. I tried trawling EBay for a re-chromable K0 fender but I am fed up with it.
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Offline markb

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Re: CB750 Cut front Fender
« Reply #1 on: May 14, 2009, 01:12:49 PM »
I've heard that you can make a "fake" cut fender from a K-1 to K-6 fender by trimming the ends off and plugging the hole for the cable guide.  Anyone done this?
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Offline AshimotoK0

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Re: CB750 Cut front Fender
« Reply #2 on: May 14, 2009, 01:20:21 PM »
It would not work because the front and rear sections would be shorter than the genuine part (I have both types but the stock one is beyond repair)
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Offline markb

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Re: CB750 Cut front Fender
« Reply #3 on: May 14, 2009, 01:25:20 PM »
But only by an 1/8" of an inch or so.  Not enough to notice without measuring.
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Offline AshimotoK0

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Re: CB750 Cut front Fender
« Reply #4 on: May 14, 2009, 01:32:40 PM »
Hmmm - I make it at least 1/2" at the sides, if you make the curved contour the same.
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Offline markb

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Re: CB750 Cut front Fender
« Reply #5 on: May 14, 2009, 01:38:58 PM »
That might be a little too much to not be noticed.  I've never actually checked it out.
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Offline bunghole

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Re: CB750 Cut front Fender
« Reply #6 on: May 14, 2009, 02:02:40 PM »
Sorry for the ignorance, but can someone explain the difference...or even show a pic?
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Offline AshimotoK0

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Re: CB750 Cut front Fender
« Reply #7 on: May 14, 2009, 02:13:06 PM »
The 'cut one' does not have a 'rolled over' front and rear 'beaded' edge. It was only fitted to Sandcasts and early K0's. There is also no hole for a rubber cable grommet. There is also another USA version where the front is rolled over (or beaded) but the rear it cut (safety?)

See Yamiyas site for details  1154 USD !!!!!!!!!!!!! --- Each !!!!!!!!!!!!!!!!!!

http://www.yamiya750e.com/index.php?main_page=product_info&cPath=28_79&products_id=232


Could post photos, but I don't know how to on this site (I am new to it)
« Last Edit: May 14, 2009, 02:15:22 PM by AshimotoK0 »
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Offline Old Scrambler

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Re: CB750 Cut front Fender
« Reply #8 on: May 14, 2009, 02:27:49 PM »
Your double-cut fender is restorable for the money it takes to buy a replacement.  My buddy sold one in decent but not perfect condition for $1008 on ebay this past winter.  I sold my single-cut from a very late K0 for a couple of hundred to a Japanese buyer who works for Honda.  I am not a welder, BUT I know that butt-welding is possible without a ridge to grind. its the same process as welding the seam on a pipe or a steel can body. I have taught myself how to reshape the fender blades from the early Honda Scramblers and have successfully produced a restored fender that was welded together. My salvation was a painted finish.  You will need perfection for a chrome finish.  that may take the British method of applying copper and nickle, then refinishing the surface for the final coats of copper-nickle-chrome.
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Offline AshimotoK0

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Re: CB750 Cut front Fender
« Reply #9 on: May 14, 2009, 02:36:15 PM »
What I can't make out is how Yamiya make them. Do they have access to the original Honda Dies? They also sell (or make 'wrinkle 'tanks) for which I presume must be made using the original tooling.

Unfortunately my K0 'cut' Fender is from a Genuine early UK bike and had rotted though over the centre bracing section, so a bit too thin to repair I think. I only paid 79 GBP +tax for the Genuine K0/K1 type from Silvers.
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Offline AshimotoK0

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Re: CB750 Cut front Fender
« Reply #10 on: May 15, 2009, 09:04:39 AM »
A 'Sandcast' aficionado in the UK told me that he has seen a few new Honda Fenders that have yellowed chrome after a year or so. I must admit, the first one I got from David Silver's recently  had piin holes in  in the chrome and I returned it. He went through his entire stock and found many to be defective before he found a decent one. These were new stock not NOS
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Offline rhinoracer

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Re: CB750 Cut front Fender
« Reply #11 on: May 15, 2009, 09:34:35 AM »
I haven't done it to a fender but if you're willing to re-chrome you can weld from the top, then grind, sand and polish the weld to make it unnoticeable. TIG welding will be the cleanest. 10-15 min in the copper tank will fill any scratch left, 30-45 min in the nickel tank will make it shine like a mirror.
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Offline blake255

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Re: CB750 Cut front Fender
« Reply #12 on: May 15, 2009, 10:23:34 AM »
Restoration chrome companies like Advanced Plating in Nashville, TN pride themselves on their bumper work.  I have not seen your fender, but I think it would be worth a shot to contact a company like that and let them take a look at it.  You might be pleasantly surprised.

http://www.advancedplating.com/index.html

As for Yamiya’s parts, I’ve seen in some item descriptions where it states that Yamiya sourced them from the actual OEM to Honda.  One reason the prices are so high is that Honda ordered a couple hundred thousand of an item.  Yamiya probably orders a couple hundred and has to cover all the setup across a low quantiy.  But if you have no choice at least Yamiya’s an option.  As a matter of fact, I'm in need of a sandcast oil filter housing.  I'll probably have to get a repro from Yamiya.
« Last Edit: May 15, 2009, 10:25:31 AM by blake255 »
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Offline AshimotoK0

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Re: CB750 Cut front Fender
« Reply #13 on: May 15, 2009, 03:18:26 PM »
Great advice everyone !! I must say that this forum is absolutely brilliant. Sometimes you get bit despondant trying to search for that ever elusive part and it's great to chat about your ideas/problems.

I think I am going to go the route of cutting up a new fender and welding sections on then re chroming. The original one has seen too many UK winters for my liking. If it's successfully then I will CAD up the modifications and post them here for others.


I am not criticising Yamiya in any way. After all when you see what rusty old wrinkle tanks go for on EBay, then Yamiyas new repro tank seems very reasonable. Same with Ducktail seats and clock cases. If they did not sell them the Ebay prices may be even higher. It's just a shame Honda opted for K1 re-manufacture for 'series 300' parts and not K0. But there again if I were a K1 owner I would be saying the opposite!!

I still maintain that if Honda were to remake the Ducktail  K0 seat though they would sell lots of them - they are so gorgeous.
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Offline GammaFlat

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Re: CB750 Cut front Fender
« Reply #14 on: May 15, 2009, 04:24:37 PM »
Can you tell me which one this is?  It is from a K0 (May 70 build date I think) but some of the parts have been replaced... so it's not completely original.

*** EDIT *** Never knew the difference before but as I examine my pictures (zoom in), I see that the fender edge is "curled over" which I imagine would make this fender later than K0.  Doesn't surprise me too much because this bike has a May 1970 frame and roughly matching engine (hundred and something away I think) but some front end parts don't make sense for the year.  Oh well.   

« Last Edit: May 15, 2009, 05:01:35 PM by GammaFlat »
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Offline AshimotoK0

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Re: CB750 Cut front Fender
« Reply #15 on: May 15, 2009, 11:59:45 PM »
I am no expert but it looks like a late production K0 cut rear only. Evidently the USA did not like the cut front so Honda beaded it over. I reckon this is probably the rarest type because, as far as I know Yamiya don't make one like that, they only do the 'double cut' version

Best rgds Ash
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Offline AshimotoK0

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Re: CB750 Cut front Fender
« Reply #16 on: May 16, 2009, 12:07:27 AM »
Hey any welding experts out there!! If I do go ahead, is it worth me casting a metal backing piece to put behind the butted parts to aid during welding. I could make a plaster cast of a good section and then cast the part in metal as my brother owns a company with a nonferrous foundry.

Any advice on welding up the cable grommet hole - so that the finished work is almost unnoticeable

As I said earlier, if it works out then I will fully detail and post details here.
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