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    Royal Enfield

    Royal Enfield Classic / Hunter / Meteor / Bullet 350 J-Series Tappet Nut Tool ST-31027/A

    Royal Enfield Classic / Hunter / Meteor / Bullet 350 J-Series Tappet Nut Tool ST-31027/A

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    Important Order Policy
    Please order only after confirming the part number, model, variant, year, side, connector type and compatibility. All orders are non-cancellable once placed. Correctly shipped spare parts are not eligible for return, exchange or refund due to wrong selection, wrong diagnosis, fitment mismatch, mechanic recommendation or change of mind. Electrical/electronic items are additionally non-returnable once opened, installed, plugged in, tested or used. Wrong item, damaged item or missing item claims require a complete unboxing video within 24 hours. Read full Return & Warranty Policy

    Royal Enfield Classic / Hunter / Meteor / Bullet 350 J-Series Tappet Nut Tool ST-31027/A

    Royal Enfield ST-31027/A Tappet Nut Tool is a genuine Royal Enfield special service tool used during tappet / valve-clearance service work on catalogue-matched J-Series 350 motorcycles. It is commonly searched as a tappet nut wrench, tappet tool, valve adjustment tool, valve clearance tool, J-Series 350 tappet tool or Royal Enfield special tool ST31027.

    Short Hook

    Genuine Royal Enfield tappet nut tool for J-Series 350 valve-clearance service where ST-31027/A or ST31027 is specified in the special tools catalogue.

    What This Product Is

    • Genuine Royal Enfield special service tool
    • Part number: ST-31027/A
    • Base/search number: ST31027
    • Factory description: Tappet Nut Tool
    • Workshop tool used during tappet / valve-clearance adjustment work
    • Relevant for catalogue-matched Royal Enfield J-Series 350 special-tool applications

    What This Product Is Not

    • Not a tappet adjusting nut
    • Not a valve, rocker arm, tappet screw or engine spare part
    • Not a feeler gauge
    • Not a complete DIY tool kit
    • Not a cam timing lock tool or crank lock tool
    • Not a universal Royal Enfield tappet tool for every engine family

    Key Features

    • Original Royal Enfield special tool number ST-31027/A
    • Factory-listed as Tappet Nut Tool
    • Helps in correct tappet / valve-clearance service procedures
    • Useful for mechanics and workshops working on J-Series 350 engines
    • Reduces the need for incorrect makeshift tools during tappet service
    • Lightweight workshop tool, not a motorcycle-fitted spare part

    Buyer Search Names / Internal Search Keywords

    Royal Enfield ST-31027/A, ST31027, ST31027A, ST31027/A, tappet nut tool, tappet nut wrench, tappet tool, valve adjustment tool, valve clearance tool, Classic 350 Reborn tappet tool, Hunter 350 tappet tool, Meteor 350 tappet tool, Bullet 350 J-Series tappet tool, J-Series 350 special tool.

    Confirmed Compatibility

    Model / Engine Family Generation Tool Use Status Important Note
    Royal Enfield Classic 350 Reborn J-Series 350 Use where ST-31027/A / ST31027 is listed in the special tools catalogue Workshop service tool, not a fitted spare part
    Royal Enfield Hunter 350 J-Series 350 Confirmed in special tools catalogue references Workshop service tool, not a fitted spare part
    Royal Enfield Meteor 350 J-Series 350 Confirmed in special tools catalogue references Workshop service tool, not a fitted spare part
    Royal Enfield Bullet 350 J-Series 350 / 2023-on Confirmed in special tools catalogue references Workshop service tool, not a fitted spare part

    Fitment Not Confirmed / Check Before Ordering

    Model / Engine Status Reason to Check
    Goan Classic 350 Check before ordering Use only where the latest service tool list specifies ST-31027/A / ST31027.
    Any export-only J-Series 350 variant Check before ordering Confirm by VIN-based catalogue or workshop special-tool list.
    Older Classic 350 UCE / Bullet 350 UCE / Electra UCE Not confirmed Different engine family; do not assume common tappet tools.
    Interceptor 650 / Continental GT 650 / other 650 models Not confirmed Different engine platform and different special tools.

    Not Compatible / Do Not Order For

    • Classic 350 UCE, Bullet 350 UCE, Electra UCE or Thunderbird UCE unless the special-tool list specifically confirms ST-31027/A
    • Himalayan 411 / Himalayan 410 or Scram 411
    • Himalayan 450 or Guerrilla 450
    • Interceptor 650, Continental GT 650, Super Meteor 650, Shotgun 650, Bear 650 or Classic 650 unless the service tool list specifies this exact tool
    • Customers looking for tappet adjusting nut 574184/C
    • Customers looking for a feeler gauge or complete tool kit

    Part Number / Supersession Notes

    • User-searched number: ST-31027
    • Confirmed full part number: ST-31027/A
    • Hitchcock’s parts book style reference may show the code as ST31027 without slash/suffix.
    • Search variants: ST31027, ST31027A, ST31027/A, ST-31027, ST-31027/A.
    • No interchange with other tappet tools or timing tools should be assumed.

    Similar Parts Comparison

    Part / Search Term Description Do Not Confuse With
    ST-31027/A Tappet Nut Tool This listing; workshop tool for tappet nut service
    574184/C Tappet Adjusting Nut Actual engine nut/spare part, not the tool
    ST30949 Cam Timing TDC Lock Tool Timing tool, not tappet nut tool
    ST30922 Crank Lock Tool Crank locking tool, not tappet nut tool
    KAA00055 / KAA00107 J-Series DIY tool / puncture kit Tool kit, not this individual tappet nut tool

    When Should This Be Used?

    • During tappet / valve-clearance adjustment on catalogue-matched J-Series 350 motorcycles
    • When the workshop manual or special tools list calls for ST-31027/A / ST31027
    • When servicing the valve train and the tappet nut needs to be accessed correctly
    • When a workshop wants the correct Royal Enfield special tool instead of makeshift spanners

    Recommended Related Parts to Check

    • Tappet adjusting nut 574184/C if the nut is worn or being replaced
    • Feeler gauge set required for valve-clearance measurement
    • Rocker cover / tappet cover gasket or seal if opened during service
    • Workshop manual torque and clearance specifications for the exact motorcycle

    What’s in the Box

    • 1 unit genuine Royal Enfield ST-31027/A Tappet Nut Tool
    • Tappet adjusting nuts, feeler gauge, gaskets, service manual and other tools are not included unless separately mentioned

    Installation / Usage Notes

    • This is a workshop service tool and is not installed permanently on the motorcycle.
    • Use only according to the correct Royal Enfield service manual procedure.
    • Valve-clearance work should be performed on the correct engine condition as specified by the workshop manual.
    • Incorrect tappet adjustment can cause engine noise, poor running or engine damage.

    Return-Prevention Note

    Order this part only if the required workshop tool is ST-31027/A Tappet Nut Tool. This is not the tappet adjusting nut, not a valve, not a rocker arm, not a feeler gauge and not a complete tool kit. For non-J-Series models, confirm the exact special-tool number before ordering.

    FAQs

    What is Royal Enfield ST-31027/A?

    ST-31027/A is a genuine Royal Enfield tappet nut tool used as a workshop special tool during tappet / valve-clearance service work.

    Is this fitted on the motorcycle?

    No. This is a service tool used during maintenance. It is not permanently fitted on the motorcycle.

    Does this fit Classic 350 Reborn?

    Use it for Classic 350 Reborn / J-Series only where the service tool catalogue or workshop procedure specifies ST-31027/A / ST31027.

    Does this fit Hunter 350?

    Yes, Hunter 350 special-tool catalogue references list ST31027 as the tappet nut tool.

    Does this fit Meteor 350?

    Yes, Meteor 350 special-tool catalogue references list ST31027 as the tappet nut tool.

    Does this fit Bullet 350 J-Series?

    Yes, 2023-on Bullet 350 special-tool catalogue references list ST31027 as the tappet nut tool.

    Is this the same as tappet adjusting nut 574184/C?

    No. ST-31027/A is the tool. 574184/C is the tappet adjusting nut/spare part.

    Can it be used for UCE Classic or Bullet?

    Do not order for UCE models unless the workshop special-tool list specifically confirms ST-31027/A. UCE and J-Series engines are different.

    Does it include a feeler gauge?

    No. This listing is only for the tappet nut tool. Feeler gauge and other tools are not included unless separately mentioned.

    SEO Tags

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    Image Alt Text Suggestions

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    Google Shopping Notes

    • Brand: Royal Enfield
    • MPN: ST-31027/A
    • Condition: New
    • Product category: Vehicles & Parts > Vehicle Parts & Accessories > Motor Vehicle Parts
    • Custom product: False

    Verify Fitment on Official Brand Portals

    For selected genuine spare parts, you can cross-check the part number on the official brand portals before ordering.

    Royal Enfield Official Spares Portal

    Hero MotoCorp Official eCatalogue

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