Oil drain thread

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stonerosesmod
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A mates bought round his PX200 engine for me to give a once over internally and he said the gear oil drain plug threads are knackered.Whats the easiest fix here? Could i tap out to the next size or even M8 and use an appropriate fibre washer?
GLscoot
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The thread is already M8, its just you need a M7 socket head to remove it. I would try and keep it M8, the next common size up is M10, not a lot of M9 suppliers out there unless you go imperial.
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Shaunbond
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You might be able to get away with an M8 helicoil. I'm not sure which pitch it is but no real difference in drill size.


http://www.thorintl.com/Drill-Sizes-Hel ... tric.shtml
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stonerosesmod
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Yes i think thats the way forward.Cheers lads
ducksta
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Similar advice required my m8 has stripped the threads on a px200 its the hole in casing where you fastern the carb down any suggestions ime off to have a look tonight but was thinking would a collet be any good :?:
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GLscoot
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ducksta wrote:Similar advice required my m8 has stripped the threads on a px200 its the hole in casing where you fastern the carb down any suggestions ime off to have a look tonight but was thinking would a collet be any good :?:
Im sure thats M7 so could be retapped to M8.
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Shaunbond
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ducksta wrote:Similar advice required my m8 has stripped the threads on a px200 its the hole in casing where you fastern the carb down any suggestions ime off to have a look tonight but was thinking would a collet be any good :?:
Same thing happened on my Cosa. I helicoiled that but I'm sure it was M7.
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ducksta
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will re tap to m8
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gaz_powell
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The carb bolt thread in the casing is 7mm - don't forget if you tap it to 8mm you will have to do something with the stud and sleeve bolt (early) or shouldered bolt (later)
Shuggie
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Beedspeed do a stepped stud, 7mm on one end 8mm the other, just tapped casing to 8mm and it worked a treat! Think its soldas a lammy chaincase stud
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