Question about 1991 Honda ST 1100 Pan European

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Possable engine sceized while being stood for 8mths outside

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 jump started battery started just clicks do you have any other idears what I could use to free off the pistins

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  • Andrew Harman Dec 13, 2008

    I would like to say a big thank You to Libert yacht as he suggested i got some MARVEL MYSTERY OIL poured in the cylinders have just put the battery on and had it turning over at full speed in less than 30 minutes on the started, the plugs are now back in and she fired up lots of smoke for about 15 minutes now she is purring like a kitten, in total just over the hour from stuck to running, ( plus 3 days Soaking in Marvel Mystery Oil)

    Great suggestion and many thanks to all the fellow bikers for there sugestion if I can return the favor at any time i would be glad to.


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If your not careful you will bust the timing chain because you have stuck valves.When the valves are dealing with a ratio of 4 to 1.The cam turns 4 times to the crank 1. you need to get to the valves and if nothing else try to turn them even if it takes bringing the piston all the way up and removing the valve springs.Because you can put oil in the cylinder all day and if the valves are stuck you will never get it unstuck. Motorcycles are bad about this because you dealing with different metals.

Posted on Dec 08, 2008

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I had 2 CAT 12 cyl diesels and 2 john Deere gensets with the same prob from 3 yrs of non-operation and used MARVEL MYSTERY OIL poured in the cylinders. After 4 days, gentle barring over released the stuck rings and they could be started and are now running fine.Savings-about 80G's

Posted on Dec 08, 2008

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1) Firstly, try using DUCK OIL. Heat it up and then pour it down the spark plug holes. Leave it a week and then gently try and induce the engine to turn over.

2) This is the hardcore option. Apply a blowtorch or gastorch to the barrel itself and see if the heat frees it up.

Posted on Dec 08, 2008

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Possable Engine Seize

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.

Dec 08, 2008 | 1991 Honda ST 1100 Pan European

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