Stainless Steel Top Diaphragm Cover Carb Bolts Kit – Hyosung GV125 GT125R GT125 GT250 GV250

Description

🔩 Stainless Steel Top Diaphragm Cover Carb Bolts Kit
Hyosung GV125 / GT125R / GT125 / GT250 / GV250

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Let’s be honest. The standard OEM Top Diaphragm Cover bolts on these carbs tend to seize, rust, and round off over time — causing annoying maintenance issues.

Reference Part Numbers: 13385HG5100, 13318HG5100

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🔧 Installation Tips

• 🔩 When installing, apply a small amount of anti-seize or copper grease to the bolt threads to prevent future corrosion and ease removal.
• 🔍 Check the top diaphragm covers for any cracks or damage while changing bolts — a clean seal is important for proper carburetor function.
• ⚙️ Tighten bolts evenly in a criss-cross pattern to avoid warping the diaphragm cover.
• 🔧 Always use the correct size Allen or hex wrench to avoid rounding bolt heads.

🛠 Tuning & Performance

The Hyoriders forums have detailed guides on tuning the carburetor needle height inside the diaphragm, which can help optimize fuel enrichment and throttle response.

Adjusting this needle correctly can improve fuel economy, smoothness, and overall engine performance — especially important after changing or servicing your carburetor.

🧰 Maintenance Advice

Regular inspection of your carburetor bolts is crucial. Over time, exposure to moisture and road grime can accelerate rust and corrosion, even on stainless steel parts. Keep the bolts clean and periodically remove them to check the threads and seals.

If you frequently ride in wet or salty conditions, consider a light coating of anti-corrosion spray on the bolts after installation. This extra step helps extend the life of your carburetor seals and prevents difficult bolt removal later.

🔩 Why Stainless Steel?

Stainless steel offers superior corrosion resistance compared to standard OEM bolts, which are often made of mild steel that rusts quickly. These bolts maintain their strength and appearance over years of exposure, reducing service headaches and keeping your bike looking sharp.

Investing in quality stainless steel bolts is a small but smart upgrade that protects your carburetor’s integrity and makes future maintenance much easier.

Got questions? Contact us or visit the forums — we’re always happy to help!