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Post by Botanic on Nov 13, 2005 12:07:57 GMT
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foxy
Regular
Posts: 14
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Post by foxy on Nov 23, 2005 9:58:49 GMT
Boring farts
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Post by chcknugget on Jan 14, 2006 21:16:34 GMT
Hey, I just learned a juicy tidbit...
Apparently the 50cc and 80cc heads are from the same castings! The 50cc heads are just shaved down a little at the bottom to decrease the combustion chamber "bowl" diameter.
The valves are the same size, the ports are the same size, but the 50cc head itself is about .3mm shorter than the 80cc one. Very interesting!
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Post by Botanic on Jan 15, 2006 19:54:40 GMT
So I promised to report from the Swedish forums. One person wrote a small review of the 70cc. There are a few persons in the middle of changing right now.
The small review translated by me: The change took 2 hours. No problems driving with 95 Octane gas. The bike goes only slightly faster than before, but it feels stronger.
He wrote this directly after his first run with it. So it probably gets better with time.
There has been some discussion about colder spark plugs for these bigger bore kits. CR8HSA is the one to probably get.
The main jet needs to be bigger also. 0,94 seems to have worked for some.
This is all second hand information. I have no personal experience. I will post more when more people have been testing.
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Post by r08813 on Feb 2, 2006 18:28:04 GMT
What's happenned with tis thread? are the big bore kits still coming over here?
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Post by Ginger Phil on Feb 2, 2006 19:06:31 GMT
Probably not, he hasn't been on in a while..... #crying#
Recent Activity -------------------------------------------------------------------------------- Last Login Date: 20 Oct, 2005, 12:18pm
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