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Jim
 Post subject: Re: H1 Forensics
PostPosted: Thu Apr 19, 2012 8:51 am 
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Joined: Wed Jun 08, 2011 11:34 pm
Posts: 9844
Location: North Central NC
It's possible that the old style oil pump cap is the problem. Service Bulletin 73 H-16 explains this.

Quote:
CAUSE: This problem has been traced to faulty O-ring seating in the oil pump end cover. After installation, the two O-rings inside the cover shrink approximately .1 to .2mm in diameter. This shrinkage allows oil to seep around the seals and into the end cover chamber. From this point, the excess oil is pumped to the right cylinder which is serviced by the end cover orifice, resulting in smoking and premature sparkplug failure.

It should be noted that other symptoms may indicate oil pump malfunction, such as right hand piston seizure. This may be caused by oil being forced back into the main pump body through defective O-rings. As a result, the right cylinder is starved for oil, and this situation will eventually lead to seizing.

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Mr. Foully
 Post subject: Re: H1 Forensics
PostPosted: Thu Apr 19, 2012 10:53 pm 

Joined: Sun Sep 18, 2011 10:14 pm
Posts: 298
Location: East Troy, WI
It should be noted that other symptoms may indicate oil pump malfunction, such as right hand piston seizure. This may be caused by oil being forced back into the main pump body through defective O-rings. As a result, the right cylinder is starved for oil, and this situation will eventually lead to seizing.

Thanks guys. Since the bike has sat for two years, about a half inch of air has accumulated equally in all three lines.

Since it's the RH cylinder, I suspected possible oil pump issues...would that one be the first affected?

However, the bike limped several miles back to the hotel without problems in the other cylinders.

I will spend the weekend figgering it.
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Ja-Moo
 Post subject: Re: H1 Forensics
PostPosted: Thu Apr 19, 2012 11:03 pm 
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Joined: Tue Jun 07, 2011 6:37 am
Posts: 10460
Location: Rio Rancho, New Mexico
Check the check valves, and maybe get a spare pump........

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Mr. Foully
 Post subject: Re: H1 Forensics
PostPosted: Thu Apr 19, 2012 11:42 pm 

Joined: Sun Sep 18, 2011 10:14 pm
Posts: 298
Location: East Troy, WI
It's a 71 motor, do they have valves?
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Ja-Moo
 Post subject: Re: H1 Forensics
PostPosted: Fri Apr 20, 2012 12:09 am 
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Location: Rio Rancho, New Mexico
Mr. Foully wrote:
It's a 71 motor, do they have valves?


Unless I have totally lost the plot, all triples have check valves in the case oil lines.

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Mr. Foully
 Post subject: Re: H1 Forensics
PostPosted: Sun Apr 22, 2012 8:25 am 

Joined: Sun Sep 18, 2011 10:14 pm
Posts: 298
Location: East Troy, WI
You may be correct Mr. Aylor. Teardown of the RH oil line found a small piece of goo that had made it past the ball but got stuck in the tapered end of the spring. The ball was just slightly stuck in it's seat, although that may have been caused by the two year hiatus.

Don't let this get around, but I didn't even know there were check valves in them lines.

I anticipate buttoning up the motor with a temporary RH cylinder today.
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Mr. Foully
 Post subject: Re: H1 Forensics
PostPosted: Sat Apr 28, 2012 10:29 pm 

Joined: Sun Sep 18, 2011 10:14 pm
Posts: 298
Location: East Troy, WI
It starts, runs & drives. It'll be on the trailer within 18 hours.

The injection lube had turned to jelly. A small chunk got by the RH cyl check valve and got stuck in the relief spring, cutting off oil to that cyl.

The oil tank, although it sat for two years, had two inches of jelly in it, and the screen was impregnated with it.

I don't know if it was from mixing a castor-based pre-mix oil with the old Kawasaki or Suzuki brand mineral stuff, or if water got into the oil tank from rain just before the bike grenaded.

We'll test it at the Gap.
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Jim
 Post subject: Re: H1 Forensics
PostPosted: Sat Apr 28, 2012 11:00 pm 
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Joined: Wed Jun 08, 2011 11:34 pm
Posts: 9844
Location: North Central NC
I bet the caster had some part in the problem. In any case, I'm looking forward to seeing you this week!

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