Honda CB750 Sandcast

General Category => "88 Model Distinctions" => Topic started by: kp on January 20, 2019, 06:07:52 pm

Title: CAMSHAFT CRADLES
Post by: kp on January 20, 2019, 06:07:52 pm

All sandcast engines came equipped with thin cradle shoulders on the rocker shaft holders. Later die cast engines (from E1010338 Thanks Chris Rushton) had thick shoulders, due to cracking issues, and also had a modified cam cover to accommodate this larger shoulder casting. There is a detailed thread describing the differences between these cam covers.
Honda made several different castings of these cradles over the life of the sandcast engine. The early engines (at least to E132) had castings which were very different from the latter castings so I've provided some detailed photos that members may find interesting if anything. One striking feature of the early casting is it was painted, and cast using a single sand box. Later castings had a very pronounced casting box ridge where the 2 boxes were joined prior to casting. Hope you find interesting

Title: Re: CAMSHAFT CRADLES
Post by: markb on January 21, 2019, 09:16:57 am

Excellent work!  ;)

Title: Re: CAMSHAFT CRADLES
Post by: DW69K0 on January 21, 2019, 02:25:46 pm

Agree with Mark!
Great work and excellent attention to detail!
DW

Title: Re: CAMSHAFT CRADLES
Post by: vnz00 on January 23, 2019, 05:08:26 am

Ill add some pics to this thread of the type 2 and type 3 cradles.
Type 2 are stamped 44.6.2, Type 3 are stamped 44.7.2 (a bit unclear so please correct me if you think otherwise).
So the change between Type 2 and Type 3 occurred sometime in June.

Title: Re: CAMSHAFT CRADLES
Post by: 4pots1969 on January 23, 2019, 09:27:08 am

All these photos with these differences are very interesting...Thanks