1997-2001 Honda CR250 – Reed Valve Rebuild

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How To Service The Reed Valves On Your 97-01 Honda CR250

1997 - 2001 Honda CR250 - Reed Valve ServiceThe Tools You Will Need

  • 8mm Socket
  • Feeler Gauge
  • Plastic Scraper
  • Philips Screwdriver
  • Threadlocker
  • Carburetor Cleaner
  • Shop Towels

The Parts You Will Need

  • New Set Of Reeds – 14111-KZ3-B11
  • New Gasket – 14132-KZ3-880

Servicing your reed valve will cost around $20 for OEM parts, and take about half an hour to complete.

Pre-Service Notes

  • Start with your bike on a stand with the carburetor removed.
  • I recommend opening the Service & Torque Specs in a new tab for easy reference.
  • If you need parts and tools, make sure to buy them here!
  • Pictures with captions are after the steps below.
  • If you need any help don’t hesitate to ask!

Reed Valve Removal

  1. Remove the carburetor boot mounting bolts, then pull the reed valve assembly and gasket.
  2. Make sure to stuff a shop towel in the reed valve housing to keep junk out of your crankcase.
Remove the carburetor boot mounting bolts, then pull the reed valve assembly and gasket.
Remove the carburetor boot mounting bolts, then pull the reed valve assembly and gasket.

Remove Reed Valve Assembly

Make sure to stuff a shop towel in the reed valve housing to keep junk out of your crankcase.
Make sure to stuff a shop towel in the reed valve housing to keep junk out of your crankcase.

Clean & Inspect

  1. Clean the reed valve housing inside and out with a PLASTIC scraper.
  2. Inspect the reeds for any visible damage. If you find any, replace your reeds.
  3. Inspect the reed valve body and reed stoppers.
  4. If your reeds look good, use your feeler gauge to measure the clearance between the reed ends and the body.
  5. Maximum Clearance: 2mm
  6. If you find a missing screw, you might want to check out your crankcase.
  7. These valves are within spec, but since I don’t know when they were serviced last, I am going to install a set of new pedals.
  8. Remove the reed stopper mounting screws, discard the old pedals, and clean the body.
  9. Align your new pedals, and install the screws with thread locker.
  10. I find it easier to thread the screws a few turns, then pull each one out individually to apply thread locker.
  11. Make sure the thread locker does not get on the pedals.
Clean the reed valve housing inside and out with a PLASTIC scraper.
Clean the reed valve housing inside and out with a PLASTIC scraper.

Wipe Down Assembly

Clean Assembly

If your reeds look good, use your feeler gauge to measure the clearance between the reed ends and the body.
If your reeds look good, use your feeler gauge to measure the clearance between the reed ends and the body.

Remove Valve Stopper Screws

Align your new pedals, and install the screws with thread locker.
Align your new pedals, and install the screws with thread locker.

Related: This Lectron self-adjusting carb will take your bike to the next level!

Reed Valve Installation

  1. Remove the shop towel from the reed valve housing, and install the new reed valve gasket, with the tacky side in.
  2. Install the reed valve assembly with the tabbed side facing up.
  3. Make sure the clutch guide is mounted on the top left side of the assembly.
  4. Install the mounting bolts finger tight, then gradually tighten them in a criss-cross pattern.
Align your new pedals, and install the screws with thread locker.
Align your new pedals, and install the screws with thread locker.
Install the reed valve assembly with the tabbed side facing up.
Install the reed valve assembly with the tabbed side facing up.

Install Carburetor Boot

Install the mounting bolts finger tight, then gradually tighten them in a criss-cross pattern.
Install the mounting bolts finger tight, then gradually tighten them in a criss-cross pattern.

If you have any questions or anything to add, please leave them in the comments or on our FaceBook page!

Keep Your ’97-’01 CR250 Running Right!

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