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Does anyone have the camshaft timing figures for the 80 and later 1100? They are different from the 78@79 which I have. I wrote Yamaha a letter and they sent me the specs on the 78 and 79 but said they no longer had the info on the 80 and up.I'm also looking for the combustion chamber size measured in cc's of the 78@79 head,which was smaller than the 80 and up(it had smaller valves).Wiseco sells pistons for these things,but it's one size fits all,(early and late) which isn't exactly kosher.
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Does anyone have the camshaft timing figures for the 80 and later 1100? They are different from the 78@79 which I have. I wrote Yamaha a letter and they sent me the specs on the 78 and 79 but said they no longer had the info on the 80 and up.I'm also looking for the combustion chamber size measured in cc's of the 78@79 head,which was smaller than the 80 and up(it had smaller valves).Wiseco sells pistons for these things,but it's one size fits all,(early and late) which isn't exactly kosher.
81 Black "1179" Xcessively trick Super Special. One owner (me). -
Hey Dan,
It's late, don't have those figures or time to research, but I did the big bore in my 81 model, same as 80, and have had no problems. What are you worried about, it will fit and work!?
T.C.T. C. Gresham
81SH "Godzilla" . . .1179cc super-rat.
79SF "The Teacher" . . .basket case!
History shows again and again,
How nature points out the folly of men!
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