Honda CB750 Sandcast

General Category => General Discussion => Topic started by: greenjeans on January 03, 2012, 02:26:40 pm

Title: Does anyone have a good/clear photo of the underside of the front fender ?
Post by: greenjeans on January 03, 2012, 02:26:40 pm

I'm looking for a good/clear photo of the underside of the "double-cut" front fender - both end, front and back.

Also, if you have one, a photo of the speedometer cable guide on the fender stay.

It may be my overactive imagination, but the cut edges of my fender don't quite look accurate enough for my tastes.   How were these cut at the factory ?   Shear ?  By hand ?

On the plus side, it doesn't have the punched hole for the cable guide on it and doesn't show signs of it ever being there (ie filled and re-chromed)

Thanks in advance.

Title: Re: Does anyone have a good/clear photo of the underside of the front fender ?
Post by: Steve Swan on January 03, 2012, 02:51:05 pm

KP has done alot of research on front fender types.  Seems, i recall, there are pictures somewhere in the BB.  I'm going with sheared in a press operation for the front/rear edges.  Can you provide pics of your edges so we can see what is concerning ?

Title: Re: Does anyone have a good/clear photo of the underside of the front fender ?
Post by: kp on January 03, 2012, 04:18:34 pm

Tis here
http://cb750sandcastonly.com/smf_forum/index.php?topic=144.0 (http://cb750sandcastonly.com/smf_forum/index.php?topic=144.0)
n here
http://cb750sandcastonly.com/smf_forum/index.php?topic=164.0 (http://cb750sandcastonly.com/smf_forum/index.php?topic=164.0)

Title: Re: Does anyone have a good/clear photo of the underside of the front fender ?
Post by: kp on January 03, 2012, 04:20:59 pm

send me some pics and I'll let you know. Can't see an original bike like this which has no cable guide having a fake fender KP

Title: Re: Does anyone have a good/clear photo of the underside of the front fender ?
Post by: greenjeans on January 03, 2012, 04:29:15 pm

Thanks - that's the thread I was looking for.  I didn't remember it was comparing the stock vs repop fender.    That makes me feel a lot better about my fender now.

Anybody know how these were cut ?  Looks like they were sheared or cut by hand first, then rolled and formed ?   My cut still does not appear to be a perfect radius - human element ?

I'll post up some photos of mine this evening and see what yo guys think.

Title: Re: Does anyone have a good/clear photo of the underside of the front fender ?
Post by: kp on January 03, 2012, 04:39:52 pm

Quiz Time  ;D They were cut flat and then rolled ....................... now how do I know that  :o Get the brains working now

Title: Re: Does anyone have a good/clear photo of the underside of the front fender ?
Post by: Wayne on January 03, 2012, 05:32:19 pm

Quote from: kp on January 03, 2012, 04:39:52 pm

Quiz Time  ;D They were cut flat and then rolled ....................... now how do I know that  :o Get the brains working now

Well, I have never seen one but here's a guess. If it's cut flat then the "roll" would be open at the ends. If were cut after rolling, the shears would crimp the "roll' closed while cutting through it.  ??? ??? ???

Title: Re: Does anyone have a good/clear photo of the underside of the front fender ?
Post by: markb on January 03, 2012, 06:02:12 pm

Because the edges don't line up on the inside?  :D

Title: Re: Does anyone have a good/clear photo of the underside of the front fender ?
Post by: greenjeans on January 03, 2012, 10:19:36 pm

Here are some photos for mine.   No punched hole for a cable guide so that's good.  Nothing about the cut edges really looks perfect - again, human element?

Do you guys see anything that puts up a red flag ?  I have no real reason to doubt its authenticity - if it's a fake, it was faked a long time ago.  

As for the quiz - I'm guessing that they start as a flat sheet, then the edges are rolled over - almost looks like they are rolled over some sort of wire to keep a consistent radius ??   If the edges were then cut -(by a shear/die or by hand - I wish I knew)  I guess you'd get some deformation of that rolled edge when the fender was pressed/stamped ??

I'm stumped, but I guess that's my guess.

Here's the photos of my fender:

(http://i195.photobucket.com/albums/z157/juan-verde/front-fender-003.jpg)

(http://i195.photobucket.com/albums/z157/juan-verde/front-fender-002.jpg)

(http://i195.photobucket.com/albums/z157/juan-verde/front-fender-001.jpg)

(http://i195.photobucket.com/albums/z157/juan-verde/front-fender-012.jpg)

(http://i195.photobucket.com/albums/z157/juan-verde/front-fender-006.jpg)

(http://i195.photobucket.com/albums/z157/juan-verde/front-fender-007.jpg)

Title: Re: Does anyone have a good/clear photo of the underside of the front fender ?
Post by: kp on January 04, 2012, 05:00:46 am

Quote from: markb on January 03, 2012, 06:02:12 pm

Because the edges don't line up on the inside?  :D

Give the man in the straw hat a box of chocolates  :D

Title: Re: Does anyone have a good/clear photo of the underside of the front fender ?
Post by: Steve Swan on January 04, 2012, 09:20:45 am

your edges look fine to me