ENGINE 253 BORE (MM) BORE OVER WISECO REPL. X STROKE DISPL. SIZE SIZES PK KIT PISTON RING SET SUG. DLR. SALE FITS MODEL (MM) (CC) (MM) (MM) PART # PART # PART # RETAIL COST PRICE YAMAHA 2-STROKE PW50 85-87/90-22 40 X 39.2 49 40 STD - - 1574CD N/A $30.59 $25.10 YZ85 02-22 47.5 X 47.8 85 48.0 0.5 0903-0667 - - N/A 108.54 76.60 Pro-Lite *Ceramic Composite - Cylinder sleeving or required for oversizes YZ125 94-96 54 X 54.5 124 55 1.0 - - 2165CS N/A 15.28 12.50 Pro-Lite *Ceramic Composite - Cylinder sleeving or required for oversizes YZ125 98-00 54 X 54.5 124 55 1.0 - - 2165CS N/A 15.28 12.50 Pro-Lite *Ceramic Composite - Cylinder sleeving or required for oversizes YZ125 01 54 X 54.5 124 55 1.0 - - 2165CS N/A 15.28 12.50 Pro-Lite *Ceramic Composite - Cylinder sleeving or required for oversizes YZ125 02 54 X 54.5 124 55 1.0 - - 2165CS N/A 15.28 12.50 Pro-Lite YZ125 03-04 54 X 54.5 124 55 1.0 - - 2165CS N/A 15.28 12.50 Pro-Lite YZ250 95-98 68 X 68 246.8 70.0 2.0 0903-0723 - - N/A 183.85 153.20 WR250 95-98 Pro-Lite *Ceramic Composite - Cylinder sleeving or required for oversizes YAMAHA 4-STROKE YZ250F 01-04 77 X 53.6 249 77.0 STD 0903-0561 - - N/A 218.84 154.40 13.5:1 Compression Light weight, 2-ring, gas ported ArmorGlide skirt coated YZ426F 00-02 95 X 60.1 426 97.0 2.00 - 0910-2920 - N/A 187.11 132.10 WR426F 01-02 13.5:1 High Compression HIGH-PERFORMANCE PISTONS CONT. SUG. DLR. SALE PART # RETAIL COST PRICE 0912-0016 $8.62 $7.40 $5.60 0912-0026 44.95 38.60 28.90 SUG. DLR. SALE PART # RETAIL COST PRICE 0912-0429 $31.95 $26.90 $20.80 0912-0592 8.62 7.40 5.60 SUG. DLR. SALE PART # RETAIL COST PRICE 0912-0606 $8.62 $7.40 $5.60 ATHENA PISTON AND RING PRICELIST FORGED PISTON KITS •2-stroke pistons are made from 4032 silicium •4-stroke pistons are made from 2618 silicium – the same material used to produce Formula 1 pistons •Both include 3% copper in materials for better heat resistance •All pistons are forged using a precision heat-treatment process that allows for production tolerances of just 0.01mm •Forged piston kits are available in A, B and C sizing •Forged piston tooling allows for the lightest available product •Kits include anti-wear coated piston, rings, pin and circlips CC BORE KIT REPL. FITS MODEL SIZE SIZE (mm) TYPE PART # RING PART # BETA RR 525 05-09 525 94.94 A - 0912-0026 HUSQVARNA TE125 14-16 (std. compression) 125 53.95 A - 0912-0606 125 53.96 B - 0912-0606 125 53.97 C - 0912-0606 FC350 14-15 (big bore 13.5:1 std. compression) 365 89.96 A - 0912-0429 KTM EXC/MXC 200 98-16 199 63.94 A - 0912-0016 199 63.95 B - 0912-0016 199 63.96 C - 0912-0016 1 For Cast-lite pistons.
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