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Post by scoots on Aug 6, 2013 17:21:58 GMT -5
not sure jsut wana make sure before i install it
i bought it off a guy from here NCY cam for $20 ;D
any thing to look for or am i ok?
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Post by scootnwinn on Aug 6, 2013 17:55:46 GMT -5
If it was bad you would know. Normally a bad cam is in more than one piece
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Post by sailracer on Aug 6, 2013 18:58:07 GMT -5
just check the bearings thats about the most common thing to fail
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Post by scoots on Aug 7, 2013 8:36:27 GMT -5
they feel smooth maybe a little bump every revolution
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Post by sailracer on Aug 7, 2013 8:52:51 GMT -5
they feel smooth maybe a little bump every revolution any "bump" is not good! clean them good with WD-40 and try again. If it has a bump replace it. |
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Post by scootnwinn on Aug 7, 2013 11:07:36 GMT -5
The cam is by it's very nature bumpy they call them lobes. Normally the wear is noticeable as you run your finger across it. What do you have like 50,000 miles on your scoot? The cam is a substantial large hard chunk of metal. I would suspect everything attached to it before the cam itself. The only bad cam I have ever dealt with was in 2 pieces, it was in a Honda Accord with 160,000 miles besides the 2 pieces part it still felt and looked good...
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Post by sailracer on Aug 7, 2013 11:14:00 GMT -5
[replyingto=scootnwinn]scootnwinn[/replyingto]I thought he was saying the bearing has a bump in it, if so, something's wrong. like you say, everything attached to it, sprocket, chaain, bearings. I've never seen thee lobes wear, usually lifters.or rockers wear out .
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Freshman Rider
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Post by sickopsycho on Aug 7, 2013 17:38:43 GMT -5
In order to test the cam to see if its good you would need to test for taper in the lobes, out of round in the shaft and the bearings. In order to do this you would need a dial guage at the very least that checks for this with a tolerance of something like 0.0001". Needless to say these measurements are extremely small so anything you can physically see or feel means it's way toast, not just bad. For this application your best bet is to just try it. Like what was said above, though, the 2 bearings should rotate with no resistance and you should feel no bumps or anything when you spin them- if you do, you might want to look at replacing them or the cam. The bearings are pressed on and CAN be replaced- but it might be more economically feasible to replace the entire cam if you experience this problem.
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Post by scoots on Aug 7, 2013 17:43:11 GMT -5
i pulled i outa the box and spun the bearing with the cam hanging but the bearings look perfect just seeing if there was a noticable way to tell its bad
i got it for $20 and wana make sure NCY is good and wont break
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jet
