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Aftermarket Yamaha LC135 Cylinder Heads — Bulk Supply for B2B Buyers Worldwide

Aftermarket Yamaha LC135 Cylinder Heads — Bulk Supply for B2B Buyers Worldwide

We supply aftermarket Yamaha LC135 cylinder heads to underbone engine rebuilders, aftermarket distributors, and OEM brands across Southeast Asia. The LC135 is the Malaysian name for Yamaha's T135 platform, the same 135cc liquid-cooled SOHC 4-valve engine sold as the Spark 135 in Thailand, Exciter 135 in Vietnam, Sniper 135 in the Philippines, Jupiter MX in Indonesia, and Crypton X in Greece. One head family covers all of them. We cast from aluminum alloy, CNC-machine the combustion chamber, valve seats, and sealing face, and pressure-test every unit. MOQ 500 pieces per SKU, sample orders accepted, 17 years of mass production, ISO 9001 certified.

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Technical Specifications: Yamaha LC135 Cylinder Heads

The LC135 head is an underbone head, and two things define how you source it: the bike has many regional names, and it has a huge racing aftermarket. The engine is a 135cc liquid-cooled four-stroke SOHC with four valves, a forward-inclined single cylinder, bore and stroke 54 × 58.7mm, and a 10.9:1 compression ratio. Most markets run a Mikuni VM22 carburetor; Thailand got a fuel-injected Spark 135i from 2008. Because the LC135 is the underbone racing king across Malaysia and the region, demand splits two ways: stock replacement heads for daily commuters and high-flow ported or big-valve heads for kapchai racing. We cover both. The most important sourcing step is confirming the regional model and year, since the same head wears different names. Our motorcycle cylinder head program covers the LC135/T135 family across markets.

SpecificationStandard Value
Engine PlatformYamaha T135 underbone. Sold as LC135 (Malaysia), Spark 135 (Thailand), Exciter 135 (Vietnam), Sniper 135 (Philippines), Jupiter MX (Indonesia), Crypton X (Greece). Confirm regional model in RFQ.
Engine Type4-stroke, single cylinder, SOHC, liquid-cooled, 4-valve, forward-inclined
Displacement134.4cc (nominal 135cc)
Bore × Stroke54.0mm × 58.7mm (OEM Yamaha spec)
Compression Ratio10.9:1 standard. Higher-compression racing variants available on request.
Valve Configuration4-valve (2 intake / 2 exhaust), SOHC. Big-valve racing configuration available.
Fuel SystemMikuni VM22 carburetor (most markets) or fuel injection (Spark 135i, Thailand 2008+). Intake port differs — specify carb or FI in RFQ.
Transmission Context4-speed (2005+) and 5-speed manual-clutch (Malaysia 2011-2016). Transmission does not change the head, but it helps identify the model year/variant.
Valve Seat InsertsSintered alloy-steel seats, induction-shrunk fit. Hardened racing seats available.
Valve GuidesPress-fit copper-alloy guides, reamed to OEM tolerance
Racing OptionsPorted intake/exhaust runners, oversized valves, and raised compression for kapchai racing. Specify target rpm, valve sizes, and fuel.
MaterialA356 aluminum alloy (JIS AC4CH equivalent), T6 heat treated
Casting MethodGravity die casting (standard). Low-pressure die casting (LPDC) available for higher-density premium and racing variants.
Deck Flatness Tolerance≤ 0.02mm (CMM verified on every unit)
Valve Seat Concentricity≤ 0.025mm
Supply OptionsBare casting / CNC-machined raw / Fully assembled (valves, springs, retainers, seals)
Surface FinishHanging shot blasted (matte). Powder coating or painting available on request.


Key Sourcing Information at a Glance

ParameterDetail
Product TypeAftermarket LC135/T135 cylinder heads — bare castings, CNC-machined raw, or fully assembled. Built to fit the Yamaha LC135 engine; this is a replacement part, not an original-equipment Yamaha component.
MOQ500 pieces per SKU for standard variants. Sample orders of 50-100 pieces accepted for first-time buyers. Racing-head runs of 100-300 pieces accepted.
Lead Time30-45 days for stock variants. 60-75 days for new tooling, ported racing heads, or big-valve configurations.
Regional Model CoverageOne head family across LC135, Spark 135/135i, Exciter 135, Sniper 135, Jupiter MX, and Crypton X. Confirm the carbureted or FI version, since intake-port geometry differs.
MaterialA356 aluminum (JIS AC4CH equivalent), T6 heat treated. Material certificates provided.
Quality Verification100% pressure leak testing on every unit. CMM dimensional verification of valve seats, deck flatness, and port features. Spectrometer-verified material. Batch records archived for 5 years.
PackagingStandard export carton, neutral packaging, or private-label cartons. Model-coded SKU labeling for distributors stocking multiple regional names.
Shipping TermsFOB Ningbo/Shanghai, CIF, or DDP. Export experience to Malaysia, Thailand, Vietnam, Indonesia, the Philippines, and other underbone markets.
Documentation ProvidedMaterial composition certificate, CMM inspection report, leak test pass record, batch traceability, ISO 9001 certificate, commercial invoice, packing list, certificate of origin.


How to Source the Right LC135 Head: Regional Names, Carb vs FI, and Racing Demand

The LC135 is one of Yamaha's most widely sold underbones, and the biggest sourcing trap is its many names. The same engine and head appear under at least half a dozen regional badges, so two buyers describing different bikes may need the same part — or the same name across years may hide a carb-versus-FI difference. Work through model, fuel system, then intended use. One Platform, Many Names The Malaysian LC135 is the Thai Spark 135, the Vietnamese Exciter 135, the Filipino Sniper 135, the Indonesian Jupiter MX, and the Greek Crypton X. All share the 135cc liquid-cooled SOHC four-valve engine. If a buyer references any of these names, the LC135 head family is the right starting point. Confirm the regional model so the correct SKU and any market-specific detail ship. Carbureted vs Fuel-Injected Most LC135 markets run a Mikuni VM22 carburetor. Thailand introduced a fuel-injected Spark 135i in 2008. The intake-port geometry differs between carb and FI heads, so a carbureted head and an FI head are not interchangeable. Tell us which fuel system the bike uses. 4-Speed and 5-Speed Variants The LC135 sold as a 4-speed and, in Malaysia from 2011 to 2016, a 5-speed manual-clutch model. The gearbox does not change the cylinder head, but the model year and variant help confirm which head and intake port you need. Stock Replacement vs Racing Head The LC135 is the kapchai racing king across Malaysia and the region, so demand splits two clear ways. Daily-commuter rebuilds want a faithful stock-spec head. Racers want ported runners, oversized valves, and raised compression for high-rpm power. These are different products, and we machine both. For racing heads, specify target rpm, valve sizes, compression, and fuel. Common avoidable mistakes when buying Sourcing by a single regional name without checking fitment across the family. A Sniper 135 and an Exciter 135 can take the same head — confirm the platform rather than the badge alone. Mixing carb and FI heads. The Spark 135i FI head and a carbureted LC135 head have different intake ports. Always state the fuel system. Confusing the LC135 with its successor. The T-150 (Y15ZR / Exciter 150 / Sniper 150) is a newer, larger engine with its own head. A 135 head will not fit a 150. Ignoring valve and seat condition on assembled heads. Even a commuter head lives on its valve job. Ask whether seats are freshly cut and concentric and whether new guides and seals are included. Skipping the leak test question. On a liquid-cooled head, a porous casting or poor seat seal shows up as overheating or lost compression. Confirm the supplier pressure-tests every head, not a sample.

Aftermarket Yamaha LC135 Cylinder Heads — Bulk Supply for B2B Buyers Worldwide

Who We Supply

For Underbone Engine Rebuilders

Multi-market orders supported across the LC135/T135 family (500-2,000 pieces per SKU). Rebuilders we supply across Malaysia, Thailand, Vietnam, Indonesia, and the Philippines service these bikes under different local names, so we ship with model-coded SKU labels and include a CMM report on every batch. Sample qualification runs of 50-100 pieces accepted before bulk commitment.


For Aftermarket Distributors

Private label and neutral packaging available. We support drop-shipping to consolidation warehouses across Kuala Lumpur, Bangkok, Hanoi, Jakarta, and Manila. The LC135 head moves in steady volume because the platform has sold in huge numbers for nearly two decades and the installed base keeps generating rebuild demand. Distributors stocking carb and FI versions in parallel typically run monthly or quarterly consolidated shipments.


For Kapchai Racing & Tuning Shops

Racing and tuning heads in small batches. The LC135 has one of the most active underbone racing scenes in the world. We produce ported heads, oversized-valve configurations, and raised-compression variants for kapchai racing, machined to your target rpm and fuel. Runs of 100-300 pieces accepted for qualified performance brands. Specify valve sizes, compression, and intended rpm range.


For OEM & Private-Label Brands

Long-term OEM and private-label supply with capacity reservation. We supply heads to listed motorcycle manufacturers under multi-year agreements, accept proprietary CAD (STEP/IGES), and run strict build-to-print protocols. In-house tooling development typically takes 60-75 days from approved DFM to first-article approval. Custom branding and packaging supported.


Frequently Asked Questions

What is your minimum order quantity for aftermarket LC135 cylinder heads?

Standard MOQ is 500 pieces per SKU for variants in our production library, covering the carbureted and FI LC135 heads. Sample qualification orders of 50-100 pieces are accepted for new clients, and racing-head runs of 100-300 pieces for performance brands. For long-term OEM contracts, MOQ is structured around your annual volume forecast.

Is the LC135 head the same as the Spark 135, Exciter 135, or Sniper 135 head?

Yes. LC135 is the Malaysian name for Yamaha's T135 platform, which is sold as the Spark 135 in Thailand, Exciter 135 in Vietnam, Sniper 135 in the Philippines, Jupiter MX in Indonesia, and Crypton X in Greece. They share the same 135cc engine and head family. Confirm the regional model and fuel system, because some markets differ in carb-versus-FI detail.

What is the difference between the carbureted and fuel-injected LC135 head?

The intake-port geometry differs. Most markets run a Mikuni VM22 carburetor; Thailand's Spark 135i has fuel injection from 2008. The carburetor head's intake port is shaped for carburetor airflow, and the FI head's port is built around the injector. A carb head and an FI head are not interchangeable, so always state which fuel system the bike uses.

Does the 4-speed or 5-speed model affect which head I need?

No, the gearbox does not change the cylinder head. The LC135 sold as a 4-speed and, in Malaysia from 2011 to 2016, a 5-speed manual-clutch model. We ask about the transmission only because it helps confirm the model year and variant, which in turn confirms the correct head and intake port.

Do you make racing or ported heads for the LC135?

Yes. The LC135 has one of the most active kapchai racing scenes anywhere, and we produce ported heads, oversized-valve configurations, and raised-compression variants for it. These are made to your target rpm and fuel, by LPDC for higher internal density where needed. Lead time is 60-75 days. Specify valve sizes, target compression, and intended rpm range with your inquiry.

Will an LC135 head fit the newer Y15ZR or Exciter 150?

No. The Y15ZR / Exciter 150 / Sniper 150 belongs to the newer T-150 platform with a larger 150cc engine and its own head. A 135 head will not fit a 150. If you need heads for the 150 platform, tell us and we will quote that separately.

Do your assembled heads come with valves installed?

Fully assembled heads ship with valves, springs, retainers, and seals installed, with the valve seats freshly cut and concentricity verified. Bare castings and CNC-machined raw heads do not include the valvetrain. Tell us which supply state you need in your RFQ.

What material and casting method do you use?

Primary alloy is A356 aluminum (JIS AC4CH equivalent), T6 heat treated, with material certificates. Standard process for this underbone head is gravity die casting; low-pressure die casting is available for higher-density premium and racing variants. All material is spectrometer-verified before melting.

What is the typical lead time, and do you export to my market?

30-45 days for variants in our standard library, from PO confirmation to FOB-ready, and 60-75 days for new tooling or racing heads. We have export experience to Malaysia, Thailand, Vietnam, Indonesia, the Philippines, and other underbone markets, with FOB, CIF, and DDP terms and full export documentation.

What other LC135 engine parts do you supply besides cylinder heads?

Our primary focus is cylinder heads. We also produce engine covers and intake-related castings, and can quote cylinder kits and crankcase components for the LC135/T135 platform on request. For distributors building a full LC135 top-end range, list the parts and volumes in your RFQ for a consolidated quote.

Why B2B Buyers Source LC135 Cylinder Heads From Feiya

• One head family across every regional name — we hold tooling and CMM reference data for the T135 platform, so a single SKU serves LC135, Spark 135, Exciter 135, Sniper 135, Jupiter MX, and Crypton X.

• Carbureted and FI versions both covered — we machine the correct intake-port geometry for each, so distributors can stock both without fitment errors.

• Stock and racing heads from one supplier — faithful stock-spec heads for commuters and ported, big-valve, raised-compression heads for the kapchai racing market that the LC135 defines.

• Largest cylinder head manufacturer in Yueqing City — 17,000+ m² facility, 5,000+ tons annual aluminum casting capacity, 125+ CNC machining centers, built for high-volume underbone parts supply.

• ISO 9001 certified facility — recognized as a National High-Tech Enterprise and a Technology-Based SME of Zhejiang Province, supplying listed motorcycle brands under multi-year OEM contracts.

Get a Quote for Your LC135 Cylinder Head Requirements

Send your regional model (LC135, Spark 135, Exciter 135, Sniper 135, Jupiter MX, or Crypton X), fuel system (carburetor or FI), model year, target volume, and supply state (bare casting, CNC-machined raw, or fully assembled). For racing heads, specify valve sizes, target compression, intended rpm range, and fuel. For OEM and private-label programs, include technical drawings (STEP/IGES) or OEM sample reference photos and any packaging or labeling requirements. Our engineering team responds within 24 hours.