BOLD MAGENTA part numbers are new for 2025 PARTS-UNLIMITED.COM 2025 | ATV/UTV PISTON & PISTON KITS PISTON & PISTON KITS 1090 COOL DOMES FITS MODEL DOME SIZE PART # YAMAHA YFZ350 Banshee 87-06 19cc PD305-YD1 20cc PD306-YD1 21cc PD307-YD1 22cc PD308-YD2 1 Race gas only. 2 Pump gas version. COOL HEAD SHELLS FITS MODEL PART # HONDA Repl. dome O-ring for TRX250R 86-89 PD9051 YAMAHA YFZ350 Banshee 87-06 PD300-YH Repl. O-ring set PD900 1 Replacement dome O-ring only. COOL HEAD SHELLS AND COOL DOMES •Billet-machined design offers noticeable bolt-on performance gains •Increased torque and power as a result of increasing compression •Larger water jacket area supplies more water; you get the ultimate in cooling efficiency by eliminating overheating •Cool Head shells and Cool Domes sold separately to give you a choice of compression ratios •Includes O-ring seal (no gaskets required) and adjustable and removable compression domes FITS MODEL SIZE PART # HONDA ATC200X 83-85 Std. 0903-1471 0.25 mm over 0903-1472 0.5 mm over 0903-1473 1 mm over 0903-1475 TRX250EX 03-17 Std. 0903-1356 0.25 mm over 0903-1357 0.5 mm over 0903-1358 0.75 mm over 0903-1359 1 mm over 0903-1360 TRX300EX 93-09 Std. 0903-1476 0.5 mm over 0903-1477 1 mm over 0903-1478 TRX/TRX300FW 88-00 Std. 0903-1336 0.25 mm over 0903-1337 0.5 mm over 0903-1338 0.75 mm over 0903-1339 1 mm over 0903-1340 TRX350FM/FE/TM/TE 350 00-06 Std. 0903-1341 0.25 mm over 0903-1342 0.5 mm over 0903-1343 0.75 mm over 0903-1344 1 mm over 0903-1345 FITS MODEL SIZE PART # HONDA (CONT) TRX400EX 400 99-09 Std. 0903-1351 0.25 mm over 0903-1352 0.5 mm over 0903-1353 0.75 mm over 0903-1354 1 mm over 0903-1355 TRX400FW 400 95-03 Std. 0903-1331 0.25 mm over 0903-1332 0.5 mm over 0903-1333 0.75 mm over 0903-1334 1 mm over 0903-1335 TRX400FW 04-07 Std. 0903-1361 0.25 mm over 0903-1362 0.5 mm over 0903-1363 0.75 mm over 0903-1364 1 mm over 0903-1365 TRX420FM/FE/TM/TE 07-08 Std. 0903-1366 0.25 mm over 0903-1367 0.5 mm over 0903-1368 0.75 mm over 0903-1369 TRX420TM/TE 09-14 Std. 0903-1479 0.25 mm over 0903-1480 0.5 mm over 0903-1481 0.75 mm over 0903-1482 1 mm over 0903-1483 TOP-END REBUILD KITS •Top-quality piston kits • Includes pistons, rings, pins, clips, needle bearings, head and base gaskets and intake and exhaust gaskets and oil filter for 4-stroke models PD305-YD PD300-YH 0903-1355
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