Topic: Cam sprocket

[kevins750]

I was curious after reading some of the threads on cams lately, so I pulled the cover on one of my extra motors...I have only been in 2 motors so far but most of the cam sprockets I saw on 750's where solid this one obviously not...Is this common? The motor is a 76 750, the cam is marked R2 and the only other 750 cam I have seen(other than pics on here) was my 73 with the cam marked R9..Anyway I was just curious..Thanks

[GammaFlat]

I've seen solid ones and "ventilated" ones although the pattern of holes was different than yours.  ?!

[ekpent]

DAMN first oil threads,tires and now cams. Those numbers got me lookin' through my pile,hopeing to find treasure. That sprocket though is interesting---Mike or an expert will chime in soon I am sure

[ekpent]

What are the numbers on your motor? Fish shows holes on older 70's--77+

[kevins750]

243xxx...

[ekpent]

That #  jives with a 76. 77 Micro- feesh shows holes.You are probably normal,wish my junk was not offsite so I could explore.

[754]

Holes came out in 76 from what I have seen..

[eurban]

Yes, Honda started using a lighter weight cam sprocket later in the 750 engine's evolution.

[gtyler5]

I have the same one in my '76 K.

[Yoshi823]

Morning/afternoon all (snowing here in Kent UK). In my Haynes manual (#131) it shows a solid cam sprocket when they pull apart an early K model. But on my 1978 750F2 I had a drilled/lightened version. When I wanted to degree in my reprofiled 'lumpy' cam I bought a solid early version so that the mount holes could be elongated. I havn't got the part to hand so's to state any numbers from it, but when I get a chance i'll do so.