Will this work on a 2 stroke small bore cylinder head that has a stripped hole for spark plug ??

The M12 should be the correct size. The kit instructions specifically talk about sparkplug hole repairs. Not done one yet but expect it to work. Mike

Will this work on a bike crank / pedal ?

Yes it should do as i repaired a thred on my band saw

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FreeTec 131pcs Helicoil Thread Repair Kit, M5 M6 M8 M10 M12 Metric Helicoil Kit, Heli Coil Threads Repair Set with HSS Drills Taps Thread Inserts, Rethreading Tool for Car Engine Cylinder Sump Repairs

Product ID: 68987653

🔩5 metric thread sizes M5-M12

⚙️HSS drill & taps HRC 55-62

🛠️131pcs all-in-one kit

¥22194

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔧 Fix it like a pro — thread repair mastery in one sleek kit!

COMPLETE THREAD REPAIR ARSENAL - 131 precision components covering M5 to M12 threads for every repair challenge.
EFFORTLESS PRECISION OPERATION - 135° apex twist drills and ergonomic rubber grips make restoration quick and fatigue-free.
COMPACT ORGANIZED PORTABILITY - Durable storage case keeps your toolkit ready for on-the-go fixes and professional jobs.
UNMATCHED DURABILITY STRENGTH - Heat-treated HSS tools and 304 stainless steel inserts engineered to outlast and outperform.
VERSATILE MATERIAL COMPATIBILITY - Restore threads in aluminum, steel, bronze, composites, and more — perfect for automotive and industrial use.

The FreeTec 131pcs Helicoil Thread Repair Kit is a comprehensive, professional-grade solution designed for restoring stripped or damaged threads across five metric sizes (M5 to M12). Featuring heat-treated high-speed steel drills and taps with hardness ratings of HRC 55-62, plus durable 304 stainless steel inserts, this kit ensures long-lasting repairs on aluminum, steel, and other materials. Its ergonomic design and organized case make it ideal for automotive engine, sump repairs, and general maintenance, delivering precision and efficiency in every use.

Specifications

ASIN	B074V3CNWZ
Best Sellers Rank	103,751 in Automotive ( See Top 100 in Automotive ) 167 in Thread Repair Kits
Brand	FreeTec
Customer Reviews	4.6 4.6 out of 5 stars (645)
Date First Available	13 Nov. 2017
Guaranteed software updates until	unknown
Item Weight	1.86 kg
Item model number	FT0050
Manufacturer	freebirdtrading
Manufacturer part number	FK0236
Model	Helicoil Thread Repair Kit
Product Dimensions	38 x 4 x 19 cm; 1.86 kg

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