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General Category => General Discussion => Topic started by: n3303j on May 09, 2025, 01:16:23 PM

Title: 850-T3 Ring end gap.
Post by: n3303j on May 09, 2025, 01:16:23 PM

So it's raining and I'm in my garage looking up ring end gap specs for the T3.

Guzziology sends me to the shop manual.

The shop manual shows:

0.3÷0.45 for top three rings

0.25÷0.40 for the oil ring

WTF???

Google doesn't even know what to make of that notation.

Anyone versed in the old European languages who can translate?

Thanks

Title: Re: 850-T3 Ring end gap.
Post by: RinkRat II on May 09, 2025, 01:25:17 PM

Rule of thumb    3"Bore   .012"  top ring  all others .010"
                         3.5Bore  .014  top       All Others  .012"
                          4.0 Bore  .016" top all others  .014

      Hope this helps.
      Paul B  :boozing:

Title: Re: 850-T3 Ring end gap.
Post by: Antietam Classic Cycle on May 09, 2025, 01:41:34 PM

Quote from: n3303j on May 09, 2025, 01:16:23 PM

0.3÷0.45 for top three rings

0.25÷0.40 for the oil ring

.30 mm = .012", .45 mm = .018" so top three ring end gap .012" - .018"
.25 mm = .010", .40 mm = .016" so oil ring end gap .010" - .016"

Title: Re: 850-T3 Ring end gap.
Post by: guzzisteve on May 09, 2025, 01:44:01 PM

Yes, but it's Nik so I looked in LM3 supplement 850cc top rings.30-.45 metric  oil ring .25-.40 metric

WOW, same as Charlie posted, kit should have had specs when supplied

Title: Re: 850-T3 Ring end gap.
Post by: n3303j on May 09, 2025, 01:47:19 PM

So the confusion on my part was not realizing the draftsman used the division symbol to indicate he was specifying a range between the two numbers. The numbers were straight end gap in millimeters.