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  • TIME-SERT 4212 Spark Plug Repair Kit 12 x 1.25 (4212)

TIME-SERT 4212 Spark Plug Thread Repair Kit M12x1.25

2.00 LBS
Calculated at checkout

Product Description

TIME-SERT 4212 Motorcycle Spark Plug Thread Repair Kit 12 x 1.25 commonly used on Harley Davidson and other motorcycles. Inserts are sold separately.

Remember to use Loctite PN 6020 especially on Harley Davidson's due to excess vibration. A common size for the insert is PN 42123 which is 15mm long. If there's room for a tap guide use PN 32125.
Question - I have a 1999 Harley Davidson that uses  Champion 6R12 spark plug. Will the 4212 spark plug thread repair kit work for my bike?
Answer - Yes, if it's a first time repair, because the Champion 6R12 spark plug is an M12x1.25mm so the 4212 is the right size. Rememeber to purchase the 42123 washer seat insert which is sold separately. Here's a cross reference for other spark plugs that are also the same size as the 6r12 - Cross reference: NGK DCPR7E, DCPR7EIX, Champion RA8HC,DENSO IXU22, Autolite 4163, 4164, Harley-Davidson 6r12. 
Been repaired before and need an oversized? There's no specific Time Sert "Big Sert" or oversize for 12x1.25mm spark plugs. You can however use the 5212 kit.

Mouse over the images above for a more detailed view of the kit components. Need more information on TIME-SERT thread repair kits? Visit our auto repair blog section on thread repair kits for tips, advice and all your thread repair questions answered. Just comment and we will be quick to respond.

See the pdficon-small.png TIME-SERT products pdf for more information on thread repair kits and inserts. Some are listed for certain applications on cars, trucks and motorcycles. The pdf is a partial application list so feel free to email or call if we can assist with your particular need. We also accept inquiries regarding our daily TIME-SERT specials. Remember TIME-SERT is recommended by leading car manufacturers like the General Motors Corporation. In fact TIME-SERT is GM's only authorized repair for head bolt threads.

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Product Reviews

  1. Timesert on Harley TIME-SERT 4212 Spark Plug Thread Repair Kit M12x1.25 5 Star Review

    Posted by on 25th Apr 2016

    Tooling worked great. Took my time and was done in a hour. Took the extra time to use vacuum and a small hose to suck filings out of cylinder. Then for extra insurance I then blew through the same small hose right into cylinder that is when I saw the most filings coming out. I just used wd 40 instead of grease because of the chance of the grease and filings sticking to cylinder and not sucking or blowing it out.

  2. great tool, easy to use TIME-SERT 4212 Spark Plug Thread Repair Kit M12x1.25 5 Star Review

    Posted by on 20th Mar 2016

    Very easy to use

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