Valve Spring Retainer (12931-09G10) by Suzuki

Ticking valves, low compression or a knock from the bottom end usually mean worn internal parts, and they only get worse. The Suzuki QuadSport Z90 Valve Spring Retainer (part number 12931-09G10) is the genuine Suzuki replacement. It is a factory Suzuki engine part made to the same dimensions as the part your engine was built with.

Witchdoctors carries Suzuki internal engine parts for ATVs. Check the fitment, options and tips below, and contact our team with any questions before you order.

Why Choose Suzuki

Suzuki says its Genuine Parts are the same parts used to build every Suzuki product, and each one is designed for a specific product and model. According to Suzuki, these parts are tested for performance, quality, durability, safety and comfort. Suzuki also introduced the world’s first four-wheel ATV, and it still builds the KingQuad and QuadSport lines today.

Key Features

• Genuine Suzuki part, part number 12931-09G10
• Listed for 15 Suzuki model configurations from 2007–2026
• Made to Suzuki's factory dimensions for your engine
• Helps restore compression, valve timing or bottom-end strength, depending on where it fits
• Fits with the factory parts around it, with no machining or adapting
• A small part that matters: replacing it keeps the parts around it secured and sealed the way Suzuki intended
• Matches the Suzuki part number on your parts diagram, so ordering is simple

Fitment and Compatibility

Listed for 15 model configurations from 2007–2026, including 2026 QuadSport Z90. Use the fitment tool on this page to confirm your year and model.

The fitment list skips some years in that range (2010, 2011, 2012, 2013, 2024), so check your exact year. Suzuki sometimes supersedes part numbers. If the number on your old part is different, or your model isn't listed, contact our team before you order.

Why Factory Parts Matter Inside the Engine

Internal engine parts work to tight clearances. Pistons, rings, cams, rocker arms, valves, bearings and crankcase parts all have to match each other. Using the Suzuki part number for your engine keeps those clearances where the factory set them.

When you rebuild, measure the parts you are reusing. A new part next to a worn one can still leave you with a short-lived repair.

Rebuild or Repair?

A single worn part, like a cam chain guide or a rocker arm, is often an easy fix. If compression is low, the engine smokes or the bottom end knocks, plan a fuller inspection. Measuring cylinder bore, valve clearance and crank runout tells you what else needs work.

Buying Guide

• Part number: Match 12931-09G10 to the number on your old part or your Suzuki parts diagram.
• Fitment: Confirm your year and model in the fitment tool; this part is listed for 2007–2026 models.
• Measure first: Check clearances against the Suzuki service manual before ordering a full set of parts.
• Plan gaskets: Internal repairs nearly always need new gaskets and seals.

Installation

Internal engine work is involved and usually means removing the engine or major covers. If you're not set up for it, a qualified Suzuki technician is a good choice. Follow the Suzuki service manual or the manufacturer's instructions for your model.

Before You Install

Get the Suzuki service manual for your model, a torque wrench and the measuring tools the manual lists. Keep parts in order as you remove them.

Care and Maintenance

Change oil and filter on schedule, keep the air filter clean and warm the engine before hard riding. Those three habits do more for engine life than anything else.

Why Buy From Witchdoctors

Witchdoctors carries ATV parts and accessories for Suzuki, Honda, Polaris, Yamaha, Kawasaki, Can-Am, Arctic Cat and CFMOTO. For Suzuki owners, we list genuine parts by Suzuki part number and model fitment, and our team can help you match a part to your machine before it ships.

Complete Your Ride

• Exhaust Valve (12912-08H10) by Suzuki
• Intake Valve (12911-08H10) by Suzuki
• Valve Guide - 0.3mm Oversize (11115-30D70) by Suzuki
• Bolt - 12x235mm (09100-12089) by Suzuki

Engine Components · Gaskets & Oil Seals · Suzuki QuadSport Parts · All UTV/ATV/ Side-by-Side Parts

Helpful Guides From the Witchdoctors Blog

• ATV or UTV Ticking Noise? How to Spot a Bad Camshaft & Valves
• How to Fix Ticking UTV Valvetrain Noise: Causes & Symptoms.
• Low ATV/UTV Compression? How to Check Engine Cylinders & Power Loss

Frequently Asked Questions

Is this genuine Suzuki?

Yes. Witchdoctors sells genuine Suzuki parts.

Will this fit my QuadSport Z90?

It is listed for 15 configurations from 2007–2026. Use the fitment tool on this page, and contact our team if your model isn't shown.

What causes a ticking noise at the top of the engine?

Valve clearance out of spec, worn rocker arms or a worn cam are common causes. Check the valve clearance first.

Do I need a machine shop for this repair?

It depends on the job. Cylinder and crank work often needs measuring tools or machine work, so check the Suzuki service manual.

What if my old part has a different part number?

Suzuki sometimes updates part numbers. Send us the number from your old part and our team will check whether this one replaces it.

Where to Ride

Put your ride to the test at one of these riding areas, and check each area's rules for youth riders before you go:

• Iron Range OHV State Recreation Area (Gilbert, MN): 1,200 acres and 36 miles of riding, according to the Minnesota DNR
• Windrock Park (Oliver Springs, TN): 73,000 acres of off-road riding open to ATVs

Order Today

Choose the Suzuki QuadSport Z90 Valve Spring Retainer and add it to your cart. Stock can vary, so contact our team to check availability and lead time.

Shipping

Qualifying Retail orders $159.99 or more will receive free ground shipping. Free Shipping Terms and conditions.

All orders over $500 will require a signature.

Please see International Shipping page for orders shipping outside the US.

See our full Shipping Policy page for further details.

Product Availability

We show real time product availability. These products normally ship the same business day but may ship from one of our warehouses across the country. If an item requires additional processing time you will be notified.

Returns

If your order arrives and it is not right, we will we'll fix it. We promise!

Doesn't fit or just not happy with it? You can return any new, unopened, unused or unaltered item within 30 days of delivery receipt of your item. We will issue a refund to your original payment method.

See our full Return Policy for all of the pertinent details.