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Author Topic: Engine Break-in  (Read 2054 times)

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Offline stikman

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Engine Break-in
« on: January 14, 2015, 01:38:18 PM »
Couple basic questions regarding break-in.  I've installed the ebay 836 pistons in my '77 CB750A along with a custom camshaft I had WebCam grind for me on my stock matic cam.  I've also done a fair amount of porting and chamber cleanup.  About to button up the top end.

I'm wondering what guys use for lube (if any) on a new cam in these motors and what oil would be recommended for break-in, bearing in mind it's an auto.  I'm assuming the engine braking on the autos is a bonus when it comes to break-in runs.  Any other thoughts?  Still have a bit of work on the frame, etc. before I get the motor installed, but I'm getting close.

Cheers!
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1977 CB750A "High Horse": 836cc, mild porting, custom cam, K5 roundtops, v-stacks...
1973 CB750K D5 plunger frame chopper currently building..

Offline Jerry Rxman Griffin aka MuthaF'er

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Re: Engine Break-in
« Reply #1 on: January 14, 2015, 03:55:02 PM »
Assembly lube and normal non-synthetic motorcycle specific oil

PLEASE don't get an oil thread started!
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As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline cbr954

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Re: Engine Break-in
« Reply #2 on: January 14, 2015, 04:04:17 PM »
My last new cam from Webcam came with its own assembly lube.
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Offline stikman

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Re: Engine Break-in
« Reply #3 on: January 14, 2015, 05:05:08 PM »
I'm not looking to start an oil argument.  Just looking for thoughts based on others' experience with break-ins and autos.

Yeah, I've got the assembly lube from Webcam.  Just wondering what others do.

Cheers!
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1977 CB750A "High Horse": 836cc, mild porting, custom cam, K5 roundtops, v-stacks...
1973 CB750K D5 plunger frame chopper currently building..

Offline bobjamin

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Re: Engine Break-in
« Reply #4 on: January 14, 2015, 05:34:41 PM »
Using a assembly lube is exactly what you need. I have built my share of v8s and that's all I have ever used . I am new to bikes but i always try and prime the oil pump on my cars after a new motor before start up. And use good oil to break in cams(for flat tappet)


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Offline Jerry Rxman Griffin aka MuthaF'er

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Re: Engine Break-in
« Reply #5 on: January 14, 2015, 07:23:57 PM »
Quote from: stikman on January 14, 2015, 05:05:08 PM
I'm not looking to start an oil argument.  Just looking for thoughts based on others' experience with break-ins and autos.

Yeah, I've got the assembly lube from Webcam.  Just wondering what others do.

Cheers!

Oh I understand. Oil threads tend to go viral around here LOL  ;)

As mentioned, prime your oil pump. Also fill the tank and pour the rest down the oil return holes in the front of the head through the valve caps so it'll go directly to the sump. 
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As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline stikman

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Re: Engine Break-in
« Reply #6 on: January 14, 2015, 07:41:57 PM »
No oil tank on the A's, but point well taken.

Good info, thanks for that fellahs.
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1977 CB750A "High Horse": 836cc, mild porting, custom cam, K5 roundtops, v-stacks...
1973 CB750K D5 plunger frame chopper currently building..

Offline Jerry Rxman Griffin aka MuthaF'er

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Re: Engine Break-in
« Reply #7 on: January 14, 2015, 10:22:26 PM »
LOL. Totally overlooked the A part of your post.
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As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline dragracer

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Re: Engine Break-in
« Reply #8 on: January 14, 2015, 11:15:18 PM »
Stop stirring up mess Jerry. You know you like those oil related topics.

I also use engine assembly lube.
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Offline Bill/BentON Racing

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Re: Engine Break-in
« Reply #9 on: January 16, 2015, 08:26:17 PM »
I use BG's assembly lube(prelube) and Honda's moly paste to make a mixture. Bill
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