1988-1994 Honda TRX300 Fourtrax, 1988, 1990-1994 TRX300FW Fourtrax Service Manual, Page 222Get this manual
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BRAKES ASSEMBLY (TRX300)
CAUTION
Clean all parts, excluding the boots, throughly with BRAKE FLUID only Blowout passages with compressed airInstall the pistons into the wheel cylinde