11-30-2009, 01:07 PM
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| Tech Guru resident guru
Join Date: Feb 2002 Location: Fort Mohave, AZ Age: 57
Posts: 1,121
| Re: acceptable bore taper in yamaha twin?
Bores do not "wear" in a taper, but rather wear more heavily on the front and rear thrust faces... most noticable around the port windows. We call those low spots on the bores around the ports "shadow areas" because that's what they look like after honing. Shadow low areas can be .002 -.0003" .... but taper in the bore is not good & not acceptable at all.
Respectfully, Harry Klemm Quote:
Originally Posted by mojo_jumper  What is an acceptable taper from top to bottom in a yamaha twin? |
__________________ Unless otherwise stated, responses to all forum posts are based on my personal experiences working within the PWC industry, and developing high performance PWCs since 1987. www.groupk.com |
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