Honda XR500 / XR500R Timing / Alternator Inspection Cap Set
Replacement 14mm and 30mm inspection-cap set for compatible Honda XR500 / XR500R engines using Honda's classic left-crankcase / alternator-cover cap family. The two caps provide service access to the alternator rotor, flywheel and timing marks without removing the complete engine cover.
Verified Honda Fitment
Honda XR500/XR500R fiches around 1980-1982 show 90084-471-000 and 90087-428-000 together.
Year guidance: Verified on early XR500/XR500R applications; check exact model year.
Product Details
- Set contains: 2 inspection / access caps
- Approximate nominal sizes: 14mm and 30mm
- Location: left crankcase / alternator / magneto cover
- Use: timing-mark inspection and rotor / flywheel access
- Finish: metal replacement caps
- SKU: 01334-ENG
Why Replace These Caps?
Alternator-cover inspection caps can become rounded, damaged, corroded or lost during servicing. Replacing worn caps helps restore the engine-cover appearance and gives reliable access to the timing marks and rotor area during ignition, valve-clearance and engine-timing work.
Fitment Checks
- Compare both cap diameters and thread profiles with the caps currently fitted.
- Confirm your left crankcase / alternator cover uses the Honda 90084-471-000 + 90087-428-000 cap family.
- Check the O-rings and sealing surfaces during installation and replace damaged seals where required.
- Do not force a cap into a different thread; Honda used other 30mm inspection-cap part numbers on some later or different engine families.
Delivery & Returns
- Free UK delivery with an estimated 2–3 working-day service
- 30-day returns, subject to the item being returned in its original condition
Honda OE Cross-References
This is an unbranded aftermarket two-cap set. Honda numbers are supplied as genuine OE fitment references and are not claimed to be the manufacturer MPN of this exact aftermarket product.
- 90084-428-000 – earlier Honda A.C. generator / alternator inspection cap reference
- 90084-471-000 – later Honda 14mm alternator / timing inspection cap reference
- 90087-428-000 – Honda 30mm crankcase / alternator inspection cap reference