I screwed up
Posted May 04, 2015 - 10:15 PM
Posted May 04, 2015 - 10:36 PM
don't over drill when drilling out for the tap. You will start to hit stuff inside the case.
Try not to get many metal shavings in the motor, although as they are aluminum they should not damage anything. Put grease on drill bits and taps and clean and replace grease often while drilling
Helicoils tend to make the bike drain pretty slowly. And the metal part that gets bent back/snapped off when installed CANNOT go into the motor! You cannot let it! This is stainless steel, and will lunch the engine!
I strongly advise going up to the next size of bolt, get a bolt from the store that matches the other bolts length exactly. The cases have enough meat to go to the next size up without causing issues.
Last but most important:use a torque wrench as you obviously don't have the feel for these bolts yet! The YZ/wr is a long threaded case. It's one of the more difficult bikes to strip out that bolt.
Posted May 05, 2015 - 04:51 AM
I prefer the Time-sert threads over the Heli-coil. The time-serts are a steel insert instead of a coil and there is no little tang to worry about. When you drill the case go slow and cover your drill bit and the tap with grease. That will help to keep most of the metal shavings out of the case. Once you have the new threads installed and before you put oil in it I would flush some clean mineral spirits through to get out as much of the debris as you can.