1997-2001 Honda CR250 – Top End Service – Part 8: Exhaust Valve Inspection

How To Inspect The Exhaust Valve On Your 1997 – 2001 Honda CR250.

1997 - 2001 Honda CR250 - Top End Service - Part 8 - Exhaust Valve InspectionThe Tools You Will Need Are:

  • Stiff Brush
  • Shop Towels
  • Parts Cleaner
  • Dremel
  • Calipers (Amazon)
  • Emery Paper

Click Here To Open The Top End Specifications Table In A New Window

Exhaust Valve Cleaning

The exhaust valve components are in direct contact with exhaust gases, so the carbon build up will be substantial. If you have the time, soak all the parts overnight in brake cleaner and degreaser.1997 - 2001 Honda CR250 - Top End Service - Part 8 - Exhaust Valve Inspection - Clean Scrub every component thoroughly with a soft bristle brush.

Related: Video: 1997-2001 Honda CR250 Clutch Inspection

If your valve components are as bad as mine, you can use a steel brush on a drill for the big stuff, followed by a light sanding with a Dremel.1997 - 2001 Honda CR250 - Top End Service - Part 8 - Exhaust Valve Inspection - Dremel However, to avoid gouging or uneven surfaces, I will need to follow the Dremel with fine grit sandpaper.1997 - 2001 Honda CR250 - Top End Service - Part 8 - Exhaust Valve Inspection - Emery Paper Visually inspect every part for apparent signs of uneven wear or damage.1997 - 2001 Honda CR250 - Top End Service - Part 8 - Exhaust Valve Inspection - Final Clean Inspect the valve bearings for smooth operation.  If they snag or feel rough, they need to be replaced.

Exhaust Valve Measurements

Measure the valve and flap shafts at their contact points.

Both shafts should measure no LESS than 0.196 inches.

1997 - 2001 Honda CR250 - Top End Service - Part 8 - Exhaust Valve Inspection - Measure Exhasut ShaftsExhaust Valve Governor

Clean the governor and pinion shaft.

Make sure the rack and pinion shaft grooves are straight and mesh smoothly.

Part 7: Cylinder Inspection
Part 9: Clearance Calculations
1997 - 2001 Honda CR250 - Top End Service - Part 7 - Cylinder Inspection1997 - 2001 Honda CR250 - Top End Service - Part 9 - Clearance Calculations

 

Keep Your ’97-’01 CR250 Running Right!

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