Re: newb question: What is soft seizing?

JunkyardDog /
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A "soft seize" is a very mild engine seizure, where the piston seizes in the cylinder just long enough to stop the motor. The motor will usually restart immediately after a soft seize. A soft seize can be cause by many reasons, including overheating for any reason, mixture to lean, timing off, new engine or kit not properly broken in, and a lack of lubrication. I had 2 soft seizes due to the failure of a Tomos oil injection system on a brand new moped. I ripped that thing off, and that moped now has over 14,000 trouble free miles on it. A soft seize rarely cause any damage, unless it continues to happen. However, anything that can cause a soft seize can also cause a "hard" seize, which destroys both the piston and the cylinder. From what I can tell, the 2 most common causes of engine seizure is improper installation, break in, or jetting of aftermarket kits, and Tomos oil injection system failure, not necesarily in that order. If you think your engine has soft seized, do not ride it any more until you determine the cause. If you have a Tomos with an oil injection system, the first thing you should do is get rid of the injection system, and premix your fuel at 40:1. That eliminates lack of lubrication as a possible cause, which is the most likely thing on a stock or near stock bike. Peace. Jerry.

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