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General Minitrail Talk
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Another custom nice engine
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<blockquote data-quote="kirrbby" data-source="post: 201997" data-attributes="member: 3972"><p>After replacing the broken kickstart pinion and 1st gear (actually swapped out the whole transmission) on my son's 124cc trx90 engine... it was...kinda, jumping a dog maybe, in third gear, when under power. Felt like it would pop out of gear for a half second, over and over. ...anyways...when I went in, expecting to find worn gear dogs that I had overlooked...everything looked good. Except, it was missing the thrust washer on the right end of the countershaft. I was surprised that the thickness of that washer was enough to allow it to pop out of gear.</p><p></p><p>A 28mm carb sounds crazy big. But I guess so does 152cc...and two 19mm intake valves...</p></blockquote><p></p>
[QUOTE="kirrbby, post: 201997, member: 3972"] After replacing the broken kickstart pinion and 1st gear (actually swapped out the whole transmission) on my son's 124cc trx90 engine... it was...kinda, jumping a dog maybe, in third gear, when under power. Felt like it would pop out of gear for a half second, over and over. ...anyways...when I went in, expecting to find worn gear dogs that I had overlooked...everything looked good. Except, it was missing the thrust washer on the right end of the countershaft. I was surprised that the thickness of that washer was enough to allow it to pop out of gear. A 28mm carb sounds crazy big. But I guess so does 152cc...and two 19mm intake valves... [/QUOTE]
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Another custom nice engine
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