ENGINE
354
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APP.
YEAR VERSION
DESCRIPTION
COMP.
RATIO
CYL.
BORE
(MM)
PISTON
DIAM.
(MM)
DIS-
PLACE-
MENT
SIZE
OVER
STD
TOP END
REBUILD
KIT
PISTON
KIT RINGS
WRIST
PIN
CIR-
CLIP
YAMAHA
CONTINUED
YZ 250F 14-15 Forged Big Bore Big bore piston kit; 13.5:1, makes 270cc.
Includes: piston, rings, pin, clips.
13.5:1 80 79.97 270
3
-----
901949 901604 901666 901675
YZ 250F 14-15 Forged High Comp High Comp piston kit; Includes: piston, rings, pin,
clips.
14.4:1 77 76.95 250
-----
901953 901598 903361 901675
YZ 250F 14-15 Forged High Comp High Comp piston kit; Includes: piston, rings, pin,
clips.
14.4:1 77 76.96 250
-----
901954 901598 903361 901675
YZ 250F 14-15 Forged High Comp High Comp piston kit; Includes: piston, rings, pin,
clips.
14.4:1 77 76.97 250
-----
901955 901598 903361 901939
YZ 400F 98-99 Forged Replica Replica Piston kit; Kit includes: Piston, rings, pin,
clips
12.5:1 92 91.93 400
-----
901173 901644 901045 901684
YZ 426F 00-02 Forged Replica Replica Piston kit; Kit includes: Piston, rings, pin,
clips
12.5:1 95 94.93 426
-----
901179 901647 901016 -----
YZ 450F 03-05 Forged Replica Top end piston kit includes: piston, rings, pins,
circlips, top end gaskets, and cam chain.
12.5:1 95 94.95 450 STD
903261 -----
-----
-----
-----
YZ 450F 03-05 Forged Replica
12.5:1 95 94.94 450 STD
903262 -----
-----
-----
-----
YZ 450F 03-05 Forged Replica Top end piston kit includes: piston, rings, pins,
circlips, top end gaskets, and cam chain.
12.5:1 95 94.93 450 STD
903263 -----
-----
-----
-----
YZ 450F 03-05 Forged Replica Top end piston kit includes: piston, rings, pins,
circlips, top end gaskets, and wrist pin bearing
when applicable.
12.5:1 95 94.95 450 STD
903114 -----
-----
-----
-----
YZ 450F 03-05 Forged Replica Top end piston kit includes: piston, rings, pins,
circlips, top end gaskets, and wrist pin bearing
when applicable.
12.5:1 95 94.94 450 STD
903113 -----
-----
-----
-----
YZ 450F 03-05 Forged Replica Top end piston kit includes: piston, rings, pins,
circlips, top end gaskets, and wrist pin bearing
when applicable.
12.5:1 95 94.93 450 STD
903112 -----
-----
-----
901682
YZ 450F 03-09 Forged Race
High Compression Piston kit;13.5:1, single
compression ring piston, kit includes: Piston,
rings, pin, clips
13.5:1
95 94.93 450
-----
901212 901615 901041 901682
YZ 450F 03-09 Forged Race
High Compression Piston kit;13.5:1, single
compression ring piston, kit includes: Piston,
rings, pin, clips
13.5:1
95 94.94 450
-----
901213 901615 901041 901682
YZ 450F 03-09 Forged Race
High Compression Piston kit;13.5:1, single
compression ring piston, kit includes: Piston,
rings, pin, clips
13.5:1
95 94.95 450
-----
901214 901615 901041 901682
YZ 450F 03-09 Forged Race
High Compression Piston kit;13.5:1, single
compression ring piston, kit includes: Piston,
rings, pin, clips
13.5:1
95 94.96 450
-----
901215 901615 901041 901682
YZ 450F 03-09 Forged Replica Replica Piston kit; 12.5:1 Kit includes: Piston,
rings, pin, clips
12.5:1
95 94.93 450
STD
-----
901223 901646 901041 901682
YZ 450F 03-09 Forged Replica Replica Piston kit; 12.5:1 Kit includes: Piston,
rings, pin, clips
12.5:1
95 94.94 450 STD
-----
901224 901646 901041 901682
YZ 450F 03-09 Forged Replica Replica Piston kit; 12.5:1 Kit includes: Piston,
rings, pin, clips
12.5:1
95 94.95 450 STD
-----
901225 901646 901041 901682
YZ 450F 03-09 Forged Replica Replica Piston kit; 12.5:1 Kit includes: Piston,
rings, pin, clips
12.5:1
95 94.96 450 STD
-----
901226 901646 901041 901682
YZ 450F 03-09 Forged Big Bore Big Bore Piston kit; +2mm makes 468cc. Kit
includes: Piston, rings, pin, clips
12.3:1 97 96.95 468
2
-----
901940 901649 901041 901682
YZ 450F 03-09 Forged Big Bore Big Bore Piston kit; +2mm makes 468cc. Kit
includes: Piston, rings, pin, clips
12.3:1 97 96.96 468
2
-----
901238 901649 901041 901682
YZ 450F 03-09 Forged Big Bore Big Bore Piston kit; +2mm makes 468cc. Kit
includes: Piston, rings, pin, clips
12.3:1 97 96.97 468
2
-----
901239 901649 901041 901682
YZ 450F 03-09 Forged Big Bore Big Bore Piston kit; +2mm makes 468cc. Kit
includes: Piston, rings, pin, clips
12.3:1 97 96.98 468
2
-----
901240 901649 901041 901682
YZ 450F 03-09 Forged Big Bore Big Bore Piston kit; +5mm makes 498cc Kit
includes: Piston, rings, pin, clips
12.5:1 100 99.96 498
5
-----
901329 901589 901041 901682
YZ 450F 03-09 Forged Big Bore Big Bore Piston kit; +3mm makes 478cc, 12.5:1
Kit includes: Piston, rings, pin, clips
12.5:1 98 97.96 478
3
-----
901380 901622 901041 901682
YZ 450F 03-09 Forged Big Bore Big Bore Piston kit; +3mm makes 478cc, 12.5:1
Kit includes: Piston, rings, pin, clips
12.5:1 98 97.97 478
3
-----
901381 901622 901041 901682
YZ 450F 03-09 Forged Big Bore Big Bore Piston kit; +3mm makes 478cc, 12.5:1
Kit includes: Piston, rings, pin, clips
12.5:1 98 97.98 478
3
-----
901382 901622 901041 -----
PISTONS
