BOLD MAGENTA part numbers are new for 2026 PARTS-UNLIMITED.COM 2026 | OFFROAD PISTON & PISTON KITS PISTON & PISTON KITS 1424 FITS MODEL SIZE PISTON DIAMETER PART # OEM RING # REPL. RINGS BETA 250 RR 2T 13-21 Std. 66.34 mm 0910-6798 - - 250 Xtrainer 18-21 Std. 66.34 mm 0910-6798 - - 300 RR 2T 18-21 Std. 71.94 mm 0910-6807 - - Std. 71.95 mm 0910-6269 - - 300 RX 21-25 Std. 71.94 mm 0910-6807 - - 300 Xtrainer 18-21 Std. 71.94 mm 0910-6807 - - 350 RR 4T 11-14 Std. 87.96 mm 0910-6804 - - 350 RR 4T 15-25 Std. 87.96 mm 0910-6805 - - 390 RR 4T 15-25 Std. 87.96 mm 0910-6806 - - PISTON KITS •The smart solution; save money on engine repairs •Manufactured in Japan and designed as OEM replacements •Cast from a high-silicon content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances •Available in standard sizes along with fractional increases in standard sizes • Standard B, C and D sizes extend the life of expensive plated cylinders •Additional oversizes available in 0.010 increments •Pistons supplied in a kit package that includes rings, wrist pins and circlips
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