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11.28 Piston pin bore dia. mm (in) 22.005...22.011 (0.86634...0.866575) 22.005...22.011 Weight classes + and — + and — Weight difference in one class g (oz.) 10 (0.35) (complete with pins and 10 (0.35) Direction of installation Arrow on piston crown Arrow on piston crown Production locating Production locating a (see Installing piston) Piston rings 1st groove Micro-taper compression ring B-Ring SPT TOP Height mm (in) 1.170...1.190 1.175...1.190 Wear limit mm (in) 1.1 (0.043307) 1.1 (0.043307) Gap clearance mm (in) 0.1...0.3 0.1...0.3 Wear limit mm (in) 0.8 (0.031496) 0.8 (0.031496) Side clearance mm (in) 0.030...0.070 0.040...0.075 Wear limit mm (in) 0.15 (0.00591) 0.15 (0.00591) 2nd groove Micro-taper compression ring M-Ring m Ø TOP 4 DZ Height mm (in) 1.170...1.190 1.175...1.190 Wear limit mm (in) 1.1 (0.043307) 1.1 (0.043307) Gap clearance mm (in) 0.3...0.5 0.1...0.3 Wear limit mm (in) 1.00 (0.03937) 0.8 (0.031496) Side clearance mm (in) 0.030...0.070 0.030...0.065 Wear limit mm (in) 0.15 (0.00591) 0.15 (0.00591) 3rd groove Equal-chamfer ring + tubular spring Height mm (in) 2.475...2.490 2.475...2.490 Wear limit mm (in) 2.4 (0.094488) 2.4 (0.094488) Gap clearance mm (in) 0.30...0.60 0.30...0.60 Wear limit mm (in) 1.20 (0.047244) 1.20 (0.047244) Side clearance mm (in) 0.020...0.060 0.020...0.055 Wear limit mm (in) 0.15 (0.00591) 0.15 (0.00591) Installed direction of piston rings "Top" marking uppermost "Top" marking uppermost Piston pin Piston pin dia. mm (in) 21.995...22.000 21.995...22.000 Wear limit mm (in) 21.960 (0.864567) 21.960 (0.864567) Bore dia. in piston mm (in) 22.005...22.011 22.005...22.011 Radial clearance in piston mm (in) 0.005...0.016 0.005...0.016 Wear limit mm (in) 0.070 (0.0027559) 0.070 (0.0027559) Technical Data R 850 GS R 1100 GS |