how can i tell if this old do a standard motorcycle spark plug hole 250 cc yamaha motor

You need to find the thread diameter size of your spark plug. Look up what NGK plug will work for your bike and then check this site: https://www.math.uwaterloo.ca/~rblander/NGK.txt Field one of the NGK code is thread diameter size. Then get the appropriate helicoil kit. Remove the head before drilling out and repairing the threads or you will get metal shavings in your cylinder and ruin your engine.

is Inserts stainless steel or steel ?

They are made from Chrome Vanadium Steel. I’ve used my set several times now and it’s a decent quality kit.

Can you supply me with a kit for my stihl chainsaw ms 251 spark plug ?? plug # ngk cmr6h !!

No, I purchased this product, this is not how you contact the seller.

Are the Helicoil made out of Stainless steel?

chrome vanadium, like many hand tools, such as wrenches.

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Metric Helicoil Thread Repair Kit: 131-Piece Heli Coil HSS Drills Inserts Taps & Tools M5 M6 M8 M10 M12 Automotive Engine Spark Plug Cylinder Insertion Rethreading Tools Universal Rethread Restorer

Metric Helicoil Thread Repair Kit: 131-Piece Heli Coil HSS Drills Inserts Taps & Tools M5 M6 M8 M10 M12 Automotive Engine Spark Plug Cylinder Insertion Rethreading Tools Universal Rethread Restorer

Product ID: 116793808

🔩131-piece pro-grade toolkit

⚙️HSS drills & taps for precision

🛠️Universal M5-M12 thread sizes

€ 119.54

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Description

🔧 Fix it like a pro — never miss a thread again!

ORGANIZED MOBILITY - Durable steel case keeps your tools secure and ready to go wherever the job takes you.
VERSATILITY ON DEMAND - From spark plugs to engine bolts, this kit covers all your automotive and mechanical needs.
COMPLETE THREAD REVIVAL - Restore stripped threads with 131 precision tools for flawless repairs every time.
ENGINEERED FOR ENDURANCE - High-speed steel drills and taps deliver unmatched durability and long-lasting performance.
EFFORTLESS PROFESSIONALISM - User-friendly design makes complex rethreading tasks simple for pros and DIYers alike.

The Metric Helicoil Thread Repair Kit is a comprehensive 131-piece set featuring high-speed steel drills, taps, and inserts designed for restoring stripped or damaged internal threads across M5 to M12 sizes. Ideal for automotive engine repairs including spark plugs and bolts, it combines professional-grade durability with user-friendly tools, all housed in a rugged steel carrying case for ultimate convenience and portability.

Specifications

ASIN	B07MZQK1HP
Best Sellers Rank	#5,124 in Automotive ( See Top 100 in Automotive ) #2 in Thread Metric Inserts & Repair Kits
Brand	SEDY
Customer Reviews	4.6 4.6 out of 5 stars (1,472)
Date First Available	January 21, 2019
Is Discontinued By Manufacturer	No
Item Weight	4.71 pounds
Item model number	13
Manufacturer	SEDY
Manufacturer Part Number	T97381
Product Dimensions	15 x 1.6 x 7.9 inches

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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€ 119.54

Duties & taxes included

In stock

Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Croatia.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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