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| 81cr250r how many bores? https://vintagedirtbikeforums.alp-sys.com/viewtopic.php?f=21&t=2788 |
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| Author: | davep [ Thu Sep 02, 2010 9:15 am ] |
| Post subject: | 81cr250r how many bores? |
i have a 81cr250r cyl bored .50 over no scoring just low comp 70lp how many more over sizes can i go book only list .50 but i see wesco pistons .80 over i am going to send it to a shop should i have them get the piston or is it cheper and safer to go back to a new sleve |
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| Author: | rayivers [ Fri Sep 03, 2010 6:06 am ] |
| Post subject: | Re: 81cr250r how many bores? |
If Wiseco makes an .080 oversize piston, I imagine that's the absolute cheapest way to go. I assume you've measured the piston and found it's under the minimum spec diameter, so that just a ring replacement won't be enough? If it were my bike and I was planning on keeping it, I'd consider have U.S. Chrome plate the liner wuth Nikasil to the standard or 1st-oversize bore (they can add about .025" of Nikasil for an .050" bore reduction). This is a much better solution than replacing the cast-in liner with a press-fit one, in my opinion. Cost is about $270. Ray |
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