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Stripped 6mm Threads


Discussion at Motorized Bicycle Engine Kit Forum in the Mounting Techniques forum. Vic's Tip *** If you have any 6mm threads that are stripped. Install heli-coils. But if you don't ...
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Old 07-14-2009, 10:57 PM
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Default Stripped 6mm Threads

Vic's Tip *** If you have any 6mm threads that are stripped. Install heli-coils. But if you don't have the special tap kit here is the next best thing. Just tap the striped out threads to 1/4-20 american. The tap drill for the 1/4-20 is a #7 drill. But when the 6mm pulls the threads out it's just the corect size for taping the 1/4-20. No need to drill out the old threads.
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Old 07-28-2009, 10:35 PM
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Default Re: Stripped 6mm Threads

how do you mount a sprocket to a chopper wheel? i want to put mine togeather
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Old 07-28-2009, 10:57 PM
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Default Re: Stripped 6mm Threads

do you have to drill though the wheel hub? or is there anouther way to do it
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Old 07-29-2009, 12:08 AM
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Default Re: Stripped 6mm Threads

timesert inserts is what I prefer used to fix 3 stripped threads on one of my engines.
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Old 07-29-2009, 03:06 AM
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Default Re: Stripped 6mm Threads

By 1/4-20 American do you mean UNC or BSW or just whitworth.

I have not heard of that measurement here in Australia.

Last edited by wildemere : 07-29-2009 at 03:21 AM.
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Old 07-29-2009, 08:12 AM
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Default Re: Stripped 6mm Threads

1/4-20 is 1/4 inch with 20 threads per inch.
SAE/American.
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Old 07-30-2009, 11:03 AM
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Default Re: Stripped 6mm Threads

Quote:
Originally Posted by donuts31 View Post
timesert inserts is what I prefer used to fix 3 stripped threads on one of my engines.
I watched the video from Timesert and have been over the website- If I were using a Chinese 2 stroke, I would seriously consider installing Timeserts from the beginning, at least at the engine mounts.
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Old 07-30-2009, 11:43 AM
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Default Re: Stripped 6mm Threads

Quote:
Originally Posted by HoughMade View Post
I watched the video from Timesert and have been over the website- If I were using a Chinese 2 stroke, I would seriously consider installing Timeserts from the beginning, at least at the engine mounts.
Probably put timeserts on the exhaust port too as they fail fairly often as well because of the exhaust hanging off the studs.

Unfortuneately the Timesert kit is about $50 for the 6 mm size
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Old 07-31-2009, 04:03 PM
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Default Re: Stripped 6mm Threads

I've often been accused of taking an inexpensive hobby and making it an expensive one. I'd have to plead guilty to that.
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Old 08-02-2009, 11:13 AM
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Default Re: Stripped 6mm Threads

One of my bikes now has 3 timesert inserts. The latest one is on the head-intake stud stripped out on me while repacing gasket.
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