Question about 2002 Yamaha TT-R 125 L

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I cross-threaded the plug on my sons ttr 90. Whats the least expensive way out of this mess? thanks

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If you are lucky you can buy a tap to match the plug thread to run through for the spark plug to screw in, plenty of grease on the tap to collect any shaving.
plugs dont need to be very tight.
If the thread is completely had it,
there are inserts available for plug threads called recoil, they look like a spring, the thread is retapped and the insert fitted, can be as strong as new. This is ideally done with the head off the bike, but can be achieved with the bike upside down and grease on the thread tap to collect shavings.
Recoil thread repairs are available at tool and engineering shops, they may be called different names in other countries.
Gav Australia

Posted on May 17, 2010

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Posted on Jan 02, 2017

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