Ok guys, I need your help once more...

[Rusty_Nail]

So this past weekend, I was out riding around my neighborhood and noticed my M65 clone pipe was vibrating pretty bad whenever I would give it some throttle. When I got home I noticed that one of the studs that screws into the exhaust port is loose like the threads in the hole are stripping out. Now I know I have the option to drill and tap a size up, but I was wondering if I were to use some JB Weld to secure the stud in the weakened hole would be a better fix than the red Loctite that was already in there. Would JB Weld hold up better to the heat of the exhaust port better than having to use the drill and tap method? Is there a specific JB weld that would be best for high heat applications like this? Trying to avoid having to buy a new cylinder since the motor is barely out of break in and most likely already has damaged threads in the hole. Any advise is appreciated.

This is the pipe I have:

Amazon.com: High Performance CDH66 Black Expansion Chamber Muffler Pipe for 2 Stroke 48cc/66cc/80cc/100cc Gas Motorized Bicycle

Amazon.com: High Performance CDH66 Black Expansion Chamber Muffler Pipe for 2 Stroke 48cc/66cc/80cc/100cc Gas Motorized Bicycle

www.amazon.com

 

[wrench]

So this past weekend, I was out riding around my neighborhood and noticed my M65 clone pipe was vibrating pretty bad whenever I would give it some throttle. When I got home I noticed that one of the studs that screws into the exhaust port is loose like the threads in the hole are stripping out. Now I know I have the option to drill and tap a size up, but I was wondering if I were to use some JB Weld to secure the stud in the weakened hole would be a better fix than the red Loctite that was already in there. Would JB Weld hold up better to the heat of the exhaust port better than having to use the drill and tap method? Is there a specific JB weld that would be best for high heat applications like this? Trying to avoid having to buy a new cylinder since the motor is barely out of break in and most likely already has damaged threads in the hole. Any advise is appreciated.

This is the pipe I have:

Amazon.com: High Performance CDH66 Black Expansion Chamber Muffler Pipe for 2 Stroke 48cc/66cc/80cc/100cc Gas Motorized Bicycle

Amazon.com: High Performance CDH66 Black Expansion Chamber Muffler Pipe for 2 Stroke 48cc/66cc/80cc/100cc Gas Motorized Bicycle

www.amazon.com

Easy fix Brah, the exhaust studs should be 6mm
With a blind hole tap - tap the hole to 1/4" x 20tpi That's the next size bolt up
It's so close that you won't need to drill the hole first - just tap the stripped hole
20tpi is a more course thread than 6mm 1.0 and will have less chance of the threads pulling out (stripping) again

1/4" x 20tpi is a common fix for 6mm stripped (pulled) threads on metric motorcycles aluminum engine cases

 

[Rusty_Nail]

Ok wrench, since it's been quite a while since I used my tap and die set, it would be the one marked 1/4 NC 20 right? Don't remember what the NC part means. I'm also guessing I'll have to enlarge the holes on the pipe where it bolts up to fit the bigger size? If it fits as is of course I wont try enlarging the holes on the pipe. Sorry if I'm asking too many questions, just want to make sure its done right.