Author Topic: A couple different cam grinds...  (Read 1322 times)

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Offline madmtnmotors

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A couple different cam grinds...
« on: November 26, 2012, 05:24:34 pm »
While prepping a spare engine to replace another troublesome mill, I came across this unusual grind profile on one of the bearing journals...








At what "degree" does the cam bearing journal start to melt?



Turns out one of the oil orifices (that little oil-jet orifice in the top of the head, under the cam tower) was plugged with an amber-like material about the size of a small grain of sand. DAMN!

Now for the other grind...
While sifting through my assortment of cams I discovered that one of these is not like the others!




Look at the plateau on top of the lobe! Now I have to scrounge up a dial gauge and figure out how big those bumps are!

« Last Edit: November 27, 2012, 03:50:48 am by madmtnmotors »
TAMTF...


Wilbur



Projects:
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F2/F3 O-rings: http://forums.sohc4.net/index.php?topic=113672.msg1300721#msg1300721
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                                           http://oldmanhonda.com/MC/wiring750K1.html
Charging system diagnosis: http://forums.sohc4.net/index.php?topic=1012.msg8345#msg8345
Get the manuals: http://manuals.sohc4.net/cb750k/
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                                      http://forums.sohc4.net/index.php/topic,100352.msg1675840.html#msg1675840
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Follow up on your damn posts: http://forums.sohc4.net/index.php/topic,144305.msg1791605.html#msg1791605
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Shorten your forks: http://vintage-and-classic-honda-s.456789.n3.nabble.com/How-to-shorten-forks-td4042465.html DO NOT CUT THE SPRINGS!
Clutch How To: http://vintage-and-classic-honda-s.456789.n3.nabble.com/How-to-change-and-adjust-a-clutch-SOHC-td4040391.html
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Offline Stev-o

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Re: A couple different cam grinds...
« Reply #1 on: November 26, 2012, 07:06:59 pm »
Plateau?!  That's a new one for me.
'74 "Big Bang" Honda 750K [836].....'71 Honda 750K project.....'76 Honda 550F.....K3 Park Racer.....K5 Fiddy Dolla Special!......and a Bomber!............plus plus plus.........

Offline 754

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Re: A couple different cam grinds...
« Reply #2 on: November 26, 2012, 07:15:49 pm »
 Get that washer off the end look for markings.. dibs if you are selling it,...
Maker of the WELDLESS 750 Frame Kit
dodogas99@gmail.com
Kelowna B.C.       Canada

My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way