First start procedure after total rebuild

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Lowbikemike
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First start procedure after total rebuild

#1

Post by Lowbikemike » Sat Oct 24, 2009 12:01 am

Just finishing up a total rebuild on my 62 motor and looking for initial starting procedures. Stock stroke, .030 over bore, new pistons, rings, valves, springs, seats, bearings, oil pump.

Do you prime the oil pump before your first start? If so, what is your procedure?

What else do I need to be concerned about?

Any and all opinions welcome.



john HD
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Re: First start procedure after total rebuild

#2

Post by john HD » Sat Oct 24, 2009 12:16 am

mike,

the last time i did a start up of a fresh motor i removed the oil return from the tank and ran it into a bucket.

start the bike, let it run at a fast idle until a couple of quarts come out. refill, repeat. this keeps the initial crap out of your oil tank.

let it cool down completely. then retorque the heads and then continue using your favorite break in procedure.

john

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Re: First start procedure after total rebuild

#3

Post by FlatHeadSix » Sat Oct 24, 2009 2:25 am

I have always put a little clean oil in each cylinder of a fresh build and kicked it over vigorously and repeatedly with the spark plugs removed before installing the plugs and trying to fire it. This should tell you that nothing is bumping something it should not, if anything is binding or rubbing or hitting you should be able to hear and feel it. The oil supply is gravity feed to the pump, kicking it over a bunch of times with the plugs removed should also prime your pump along with pushing oil through the rest of the oil circuit. Once your satisfied that everything is OK (or you're tired of kicking), put the plugs in and follow the instructions that johnhd just posted above.

have fun!

mike

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Re: First start procedure after total rebuild

#4

Post by Lowbikemike » Tue Oct 27, 2009 2:16 pm

Thanks for the replys. Is it really necessary to retorque the heads? Are they going to loosen that much, or is it just a slight amount?

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Re: First start procedure after total rebuild

#5

Post by hjans » Tue Oct 27, 2009 4:25 pm

After a rebuild of the oil pump, is it enough to just chech oil return to the oiltank, ( ie checking the set of return-gears ) or is it maybe better to chech the feed-set of gears also ? And if so, how ??

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Re: First start procedure after total rebuild

#6

Post by awander » Tue Oct 27, 2009 11:11 pm

hjans wrote:After a rebuild of the oil pump, is it enough to just chech oil return to the oiltank, ( ie checking the set of return-gears ) or is it maybe better to chech the feed-set of gears also ? And if so, how ??
If your feed is not working, you will not get very much in the way of return.

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Re: First start procedure after total rebuild

#7

Post by hjans » Wed Oct 28, 2009 7:47 am

except when the original problem ( oil sumping) is still there ?! At least for a short while then there would be oil return.
Know you have a point, but just to be sure, isn't there a way to check feedgears ??

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Re: First start procedure after total rebuild

#8

Post by john HD » Wed Oct 28, 2009 10:48 am

Lowbikemike wrote:Thanks for the replys. Is it really necessary to retorque the heads? Are they going to loosen that much, or is it just a slight amount?

yes it is necessary. the head gaskets may not last long if you do not.

john

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