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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Stripped oil pump
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<blockquote data-quote="nkt267" data-source="post: 13579" data-attributes="member: 245"><p>I think I already know what most of the answers to this are<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite9" alt=":eek:" title="Eek! :eek:" loading="lazy" data-shortname=":eek:" /></p><p>I fitted a new oil pump to a Comet,the old sleeve came out in 2 pieces and had been split for a long time by the look of it. I lapped the plunger in so that it ran smoothly and assembled the engine, it turned ok on the kick start..</p><p>It took a lot longer than I expected to get the oil to prime through the new oil filter to the quill (on the kickstart only) and once primed I started the engine and cracked open the quill screw to check for a good flow, also had good return.</p><p>I ran the bike for a bout 5 mins on 2 occassions and all seemed ok.</p><p>I got it ready for a test run yesterday and could not get any oil return.Removed the plunger tonight and guess what--It's stripped<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite4" alt=":mad:" title="Mad :mad:" loading="lazy" data-shortname=":mad:" /></p><p>Any other ideas apart from maybe I should have lapped it in a bit more?</p><p>How much lapping in before it is worn out? John</p><p>PS pump is single start and seemed good when inspected.</p></blockquote><p></p>
[QUOTE="nkt267, post: 13579, member: 245"] I think I already know what most of the answers to this are:o I fitted a new oil pump to a Comet,the old sleeve came out in 2 pieces and had been split for a long time by the look of it. I lapped the plunger in so that it ran smoothly and assembled the engine, it turned ok on the kick start.. It took a lot longer than I expected to get the oil to prime through the new oil filter to the quill (on the kickstart only) and once primed I started the engine and cracked open the quill screw to check for a good flow, also had good return. I ran the bike for a bout 5 mins on 2 occassions and all seemed ok. I got it ready for a test run yesterday and could not get any oil return.Removed the plunger tonight and guess what--It's stripped:mad: Any other ideas apart from maybe I should have lapped it in a bit more? How much lapping in before it is worn out? John PS pump is single start and seemed good when inspected. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Stripped oil pump
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