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head reprofiling
Posted: Sun Dec 21, 2014 4:44 pm
by tea5ive
Would it be possible to use an Li125 special head with the central combustion area to convert for use with a 64mm/190 conversion?. Cheers Simon
Re: head reprofiling
Posted: Sun Dec 21, 2014 5:16 pm
by belly
Short answer, yes. Will need to profile head and open out for correct compression ratio
Re: head reprofiling
Posted: Sun Dec 21, 2014 7:02 pm
by Rich_T
Yes, but also be careful. It is a common mistake to open out the head and not consider the depth of the spark plug hole. This then results in the spark plug protruding into the new combustion chamber.
I used to make loads of GT186 heads from converted 125 heads and produced a drawing profile which avoided this specific problem. If you send me a PM with your Email address I'll send you the drawing over.
I cast my own heads these days so I have no need for the drawings any more.
Best regards
Rich T