September 11, 200916 yr As this topic has come up recently with the reports of Clav and Neo, seems I needed to do a bit of checking around on this issue of ring wear. Just trying for some type comparison in a nikasil bore, my mate into carting gave me a spec of 15 hrs runtime in a air cooled cart running at an average 10-11K rpm in a 100 cc motor. Therefore, one might suggest a similar ratio of time/rpm at say 5:1 as example, yielding 75 hrs as an expected runtime on a trials bike. These numbers could also be considered to be "before major decline" as they want to keep them tuned up to top spec! All just theory! They run VERY rich in oil, at about 16:1 i think! Motors run clean! And well oiled! Many times here, the bike is run in a less than desireable enviroment with lots of dust, dirt , water and other stuff that could potentially effect the motor even with the best filter maintenance. It is all just speculation really, judging by the numbers provided by Neo as example, his new ring set guaged at .020 for the 250cc bike, and his worn rings were at .030 and .035, approaching double the new clearance, and yet I have no idea how many hours on the bike or the exact conditions. Logic would dictate that two times the new limits would be an acceptable "service limit" in an effort to retain acceptable performance, in most cases. Yet i do not know that we have enough numbers in on any of this to pass judgement on this forum. It does vary! There are tons of variables, yet it would be nice if there were some published specs! Edited September 12, 200916 yr by copemech
September 12, 200916 yr Seems I needed to do a bit of checking around on this issue of ring wear. Ring wear is normaly caused if your a Bi Sexual or Gay Man. Hope this helps.
September 13, 200916 yr Author Ring wear is normaly caused if your a Bi Sexual or Gay Man.Hope this helps. This is why they have markings on them, they are intended to be one -way devices!
September 13, 200916 yr Author You reckon after 6 years mine should be ready for a feeler gauge then? Na, since when do we want to keep things in top performance range? I stated somewhere, I rather like mine kicking over with relative ease! And I ain't takin it apart for that. Not that the compression is weally weak or anything, just as compared to new. Long term testing continues! And at the current rate, mine should be good for another few years! What would you consider to be your average run time per month or year?
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