Honda CT110 Timing / Alternator Inspection Cap Set
Replacement 14mm and 30mm inspection-cap set for compatible Honda CT110 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
CT110 parts references list 90084-471-000 and 90087-428-000 together on the left crankcase/stator cover.
Year guidance: 1980-2013 application family.
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