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S&S, 4" bore piston rings set. +.020"S&S chr moly replacement piston ring set. Fits all S&S 4" bore Super Sidewinders (incl. TC). Std cyl. bore: 4. 00" (101. 60mm). Note compression ring gap: To determine the correct ring gap on your newly installed piston rings is very important. A too narrow gap may result in premature piston ring cylinder wall wear or even seizure; possibly breaking rings and or damage to pistons and or cylinder walls; and so on. A piston ring gap that is wider than

Features a rechargeable battery

Set includes 2 fork springs for an upgrade installation

Stock replacement for brake caliper 125x4R

Includes mounting hardware and wiring harness

Thanks to the adjustable ventilation openings at the front and back

06 homologation

Fits 548164 & 548165 plug housings

high beam 1557

a more performance-oriented tire

ø 58 mm - repeat accuracy 0

OEM replacement reference 16500332

it’s the easiest way to achieve stronger