Triumph 650 O-ring Chart

Size & dash number chart of o-rings
Used on late-sixties & early-seventies Triumph 650 motorcycles

Big throttle blip out to BF!


650 Triumph O-Ring Size Chart       Nominal Reference Actual Inches Actual MM
Description Triumph p/n Dash # CS ID OD CS ID OD CS ID OD
Rocker spindle (updated) 60-3548 1.30 12.00 14.60
Rocker spindle 70-3253 -11 1/16 5/16 7/16 0.070 0.301 0.441 1.78 7.65 11.21
Tach driven gear housing & Gearshift quadrant 70-3309 -15 1/16 9/16 11/16 0.070 0.551 0.691 1.78 14.00 17.56
Tach, driven gear 70-6299 -11 1/16 5/16 7/16 0.070 0.301 0.441 1.78 7.65 11.21
Tach gear housing end plug 70-6300 -17 1/16 11/16 13/16 0.070 0.676 0.816 1.78 17.17 20.73
Tappet guide (block) 70-7563 -20 1/16 7/8 1 0.070 0.864 1.004 1.78 21.95 25.51
Pri.chaincase & Gearbox filler/inspection caps 70-8782 -20 1/16 7/8 1 0.070 0.864 1.004 1.78 21.95 25.51
Carburettor flange, thin (use w insulator 70-2968) Amal 622/101 -28 1/16 1 3/8 1 1/2 0.070 1.364 1.504 1.78 34.65 38.21
Carburettor flange, thick 70-9711 -126 3/32 1 3/8 1 9/16 0.103 1.362 1.568 2.62 34.59 39.83
Carb mounting (cup & o-ring) 70-9554 -202 1/8 1/4 1/2 0.139 0.234 0.512 3.53 5.94 13.00
Carburettor air adjustment screw (Amal 622/082 ) 99-0520 -6 1/16 1/8 1/4 0.070 0.114 0.254 1.78 2.90 6.46
Pushrod Tubes, use 71-1283 top/bottom) 71-1283Viton/70-7310Buna-N -120 3/32 1 1 3/16 0.103 0.987 1.193 2.62 25.07 30.31
Swinging fork 82-8090 -224 1/8 1 3/4 2 .139 1.734 2.012 3.53 44.04 51.10
Lower fork leg, dust excluder sleeve nut 97-2119 -130 3/32 1 5/8 1 13/16 0.103 1.612 1.818 2.62 40.94 46.18
Valve inspection cap n/a -25 1/16 1 3/16 1 5/16 0.071 1.1761 1.316 1.7829 29.8733 33.43
Valve stem seal n/a -10 1/16 1/4 3/8 0.070 0.239 0.379 1.78 2.90 6.46




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