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Everything Dirt Bike
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Suzuki
03 RM 125 engine failure. HELP!
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<blockquote data-quote="SRAD97750" data-source="post: 220368" data-attributes="member: 425"><p>This break-in procedure doesn't include the proper heat cycles the components need to come to temperature together, <em>but certainly is not the reason for this failure</em>.</p><p></p><p>I suspect 100% a jetting/carburetion issue. If the engine didn't come to an abrupt stop, then it stopped getting Air/Fuel/Spark.</p><p></p><p>This can only be from two sources.</p><p>Exterior contamination - Dusty or improperly lubricated components, no air filter in poor air quality, or something hidden in the engine during rebuild that came to the show later.</p><p>Internal component damage - Heavy detonation can cause piston chunks or ring chunks to score the cylinder.</p><p></p><p>How clean an engine needs to be during assembly is a learned thing. I have had engines do the same, but full seizure. I think you got away lucky and should try again.</p><p>Be sure everything is crazy clean prior to assembly, a very light oil application is recommended on the cylinder, piston races, pin, and bearing. -BIG DAN<img src="https://www.dirtbikeaddicts.com/static/images/smilies/thumb.gif" class="smilie" loading="lazy" alt=":thumb:" title="Thumb :thumb:" data-shortname=":thumb:" /></p></blockquote><p></p>
[QUOTE="SRAD97750, post: 220368, member: 425"] This break-in procedure doesn't include the proper heat cycles the components need to come to temperature together, [I]but certainly is not the reason for this failure[/I]. I suspect 100% a jetting/carburetion issue. If the engine didn't come to an abrupt stop, then it stopped getting Air/Fuel/Spark. This can only be from two sources. Exterior contamination - Dusty or improperly lubricated components, no air filter in poor air quality, or something hidden in the engine during rebuild that came to the show later. Internal component damage - Heavy detonation can cause piston chunks or ring chunks to score the cylinder. How clean an engine needs to be during assembly is a learned thing. I have had engines do the same, but full seizure. I think you got away lucky and should try again. Be sure everything is crazy clean prior to assembly, a very light oil application is recommended on the cylinder, piston races, pin, and bearing. -BIG DAN:thumb: [/QUOTE]
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Everything Dirt Bike
Make / Model Specific
Suzuki
03 RM 125 engine failure. HELP!
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