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We have a short article called "Harley Davidson Spark Plug Threads - How to Fix" on spark plug thread repair kits used for first time repairs on Harley Davidson and other makes of motorcycles that has received a lot of attention lately. We've also been getting emails and phone calls on how to make a repair after a parts store insert has failed making the hole bigger. For second time repairs on M14x1.25 there's a Big Sert kit available. Big Sert is Time Sert's name for an oversize thread repair k …

WiseAutoTools.com © Summary: This article covers several options for repairing stripped threads for oil and transmission (Primary or Secondary) drain plugs on Harley Davidson motorcycles. Harley Davidson motorcycles obviously vibrate a lot which may lead to the drain plugs loosening over time. If they loosen up any, thread deterioration may occur. Aluminum threads can also get damaged and stretched if drain plugs are overtightened a little.  It does not matter if it’s a Harle …