Honda CB750 Sandcast

The Restoration Shop => Engine - Cosmetic Only => Topic started by: kp on February 09, 2015, 09:11:32 pm

Title: Sprocket Covers
Post by: kp on February 09, 2015, 09:11:32 pm

Fellas
A few years back I recall some discussion about the various iterations of the lowly sprocket covers I thought Steven Vanzetto had some feedback that n this  I certainly have two versions but was led to believe that very early covers were sandcast
Can we get some feedback from owners on this subject as there is certainly more than 1 version

Title: Re: Sprocket Covers
Post by: markb on February 15, 2015, 06:55:15 pm

Hi KP,
Here is a sprocket cover off a 3-digit engine.  I got this one after I had clear coated my other one so that’s why I did use this one.  The first thing I noticed was it is a little rougher inside.  I wouldn’t say sandcast but definitely not as smooth as the other one.
(http://cb750sandcastonly.com/coppermine/albums/userpics/10002/DSC01475.JPG)

Then I saw there is a number on the inside.  Don’t know if there is any significance to that.
(http://cb750sandcastonly.com/coppermine/albums/userpics/10002/DSC01473.JPG)

Here’s another feature the other one doesn’t have, a notch on the top where it mates with the cases.  Hmmm.  You can better see some of the roughness here.
(http://cb750sandcastonly.com/coppermine/albums/userpics/10002/DSC01476.JPG)

It’s in nice shape, better than the other one.  I think I’ll eventually use it once I get it cleared.  I’m guessing it’s more correct.  Any thoughts?
(http://cb750sandcastonly.com/coppermine/albums/userpics/10002/DSC01477.JPG)
Mark

Title: Re: Sprocket Covers
Post by: kp on February 15, 2015, 09:14:33 pm

Hi Mark from Kyoto,
That cover is the replacement cover for the later K0which were fitted with a case protector designed to stop case damage from breaking chains The cutout allows the case protector to be fitted using an engine case bolt. I think I'm telling this correctly ❓

Title: Re: Sprocket Covers
Post by: hondasan on February 16, 2015, 03:15:14 pm

I would agree with KP.
I have an NOS cover which has the "cut out" referred to and which also has the number "232" inside it. Part number on the packet is 11351-300-040, which according to one of my parts lists was fitted from VIN 1026144, along with the case protector itself.

Chris R.

Title: Re: Sprocket Covers
Post by: markb on February 17, 2015, 08:51:34 am

Chris,
Now that you say that it makes sense.  I think in the back of my mind I knew it was for something later but couldn't remember what.  So the one I have shown is definitely an earlier one and I will plan on using it unless I find there is something earlier.  Then I will have to try to find one.  ::)
When did the version with the extra post and rubber sleeve come about?
Mark

Title: Re: Sprocket Covers
Post by: Erling on February 18, 2015, 02:43:29 am

On 1638 there is a half size "1" 10 mm to the right of 232!
And some coloured numbers across over the edge from 232 ??7.2?
       Erling.

Title: Re: Sprocket Covers
Post by: Erling on February 18, 2015, 02:55:40 am

Sorry in the other thread the "1" is visible!
     Erling