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I was wondering if anyone had the valve lift numbers on 79SF, I found them for the 78E are they close?
Intake= .347
Exhaust= .327
also what about the duration?
Intake= .347
Exhaust= .327
also what about the duration?
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Less of a RISE!
Well, this info I found/calculated from the Service Data sheets off of the Yamaha Web site Parts fiche pages, by subtracting the total base round size of the cam from the total cam lobe size yields these values:
79SF
Intake=.333
Exh=0.313
The 79F Int=.334
Exh=.314
Essentially no difference from standard and special of same year, but definitely less than the 78E!!!
Sorry, no info on DURATION of cams!
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! -
79 cam - duration 241.1 @ .050 on IN and EX. Peak lifts are different at 346 and 326.Comment
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Thanks alot guys,
I was wanting to add a new cam but I dont really have the money to have the heads ported and relieved and valves reseated, I need some advice
Possible New cam
valve lift .365
duration 283 @.050 246
any experiences with this cam, or suggest another one?
Wait and do it all at once, or a piece at a time?Comment
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