hammerhead
Scoot Junior
HAS ANYONE TRIED THE K80 CAM. I HAVE I JUST WANT TO KNOW WHAT YOU THINK ABOUT IT
Posts: 19
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Post by hammerhead on Apr 30, 2018 5:45:29 GMT -5
Hey scooter world I need to ask a quick question. I have a 63mm bore but the valve head I ordered from tadia says fit 59mm my question is should you use this head it seems like they sent me the wrong head because the other valve heads I have measures at 63mm instead of 58.5 on the circle on the undreside of head please help thanks.
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Post by 90GTVert on May 18, 2018 15:12:58 GMT -5
My reply is so late that it may not matter (sorry, been really busy with a project) but, you can use a head with a smaller combustion chamber. You wouldn't want to use one with a chamber larger than the bore though. Look at larger engines and you'll find that lots have a small combustion chamber compared to the bore. You could end up with very high compression if the combustion chamber isn't large enough for your setup. I don't really follow the GY6 stuff enough to tell you what is supposed to be a good bolt together setup, but you can certainly take measurements and figure out the compression ratio if you'd like or possibly try to judge by compression test figures. Also not a bad idea to check piston to valve clearances if you are unsure if a head is meant to work with a cylinder, because the valve reliefs may not be meant for that head.
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