Question about 1991 Honda ST 1100 Pan European

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Possable Engine Seize

My 2000 Honda Pan European was running find when i stopped using the bike in February this year and sheeted it up, went the move it this weekend and engine will not turn over i have removed plugs and put some oil down but still will not move, tried rocking bike on back wheel still will not move engine, tried to jump started battery starter just clonks when it engages do you have any other idears what I could use to free off the pistons

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  • Andrew Harman Dec 10, 2008

    Thanks for the advise I have put some down each of the ports and will lerave for a few day to see what happens


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Use Marvel Mystery Oil, it will loosen the rust that you may have incurred while the bike was sitting. Just one word of caution, if the mystery oil does get the pistons free I doubt seriously that you will have any significant ring seal left. You may be better off removing the heads to see if there is serious damage. You can easily bend a rod if you are not careful and it's not worth destroying the engine because of the rust issue.
What most likely has happened is your cylinders suffered from condensation which will promote the rust. The pistons will not rust, (they are aluminum), but the rings and the cylinder walls will. You may need to simply remove the pistons and run a quick hone through the cylinders, put new rings in and be good to go.
By no means should you attempt to push start it or anything remotely close. You can take a wrench and try turning the motor over by wrenching on the end of the crankshaft where the electrical stator is. A small amount of rust will stop the starter motor from turning the motor over.
Let the Marvel Mystery Oil soak over night before trying anything like turning the motor over. You may be very surprised and lucky if it works.
Best of luck to you.

Posted on Dec 08, 2008

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Rselvy is 100% accurate in his solution.
If you follow his directions, your problem will be solved.
A very good solution.

Posted on Dec 09, 2008

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