Two Brothers Racing Honda XR50R User Manual

Page 3

13. Remove the cylinder base gasket, o-ring and

knock pins (USE A CLEAN RAG TO PLUG
THE CRANKCASE - BE CAREFUL NOT TO
GET ANY DIRT, DUST OR FORGIEN BODY
IN THE CRANKCASE)

STOP ->->-> If you are installing a Super Oil

Pump (Part # 010-1-016-005) do so at this
time. Please refer to the Super Oil instruc-
tions for this procedure.

1. Install the left c-clip into the piston (arrow on

top of piston points points down)
Lightly coat the piston rings with CLEAN
motor oil

("R" mark is the top ring, "RN" mark is second
from top) Install piston rings (bottom ring first)
referencing the diagram.

Lightly coat the connecting rod and wrist pin
with CLEAN motor oil

Install the piston onto the connecting rod
(arrow on piston points down)

Install wrist pin into the piston and through the
connecting rod

Install right side c-clip into piston
Install one of the black rubber seals in the
recessed hole on the engine case.

2. Install cylinder gasket

Assemble the 81.2cc or 88cc Engine

XR50R 88cc Engine Build Instructions.qxd PAGE 3

Super Oil Pump

120