RCU Forums - ys 63 muffler threads

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rightflyer

10-30-2005 06:07 PM

ys 63 muffler threads

My muffler came loose on my YS 63fz and I am concerned the thread on the engine may be slightly dinged. What is the size/thread of the muffler header?

Dave Shadel

10-30-2005 06:16 PM

RE: ys 63 muffler threads

11x.75mm. We have taps available if you can't find them.

rightflyer

10-30-2005 08:00 PM

RE: ys 63 muffler threads

I may need one and a new threaded header. How can I contact you?

Dave Shadel

10-30-2005 08:02 PM

RE: ys 63 muffler threads

775-265-7523 weekdays 8 to 5 west coast time.

rightflyer

11-23-2005 09:23 PM

RE: ys 63 muffler threads

Dave
I installed the new threader coupler/header with teflon tape and it still fell out so I think the engines thread are damaged. IF I buy the tap to chase the threads do I have to disassmble the engine?

Dave Shadel

11-24-2005 10:01 AM

RE: ys 63 muffler threads

Just make sure the exhaust valve stays closed while cleaning it out and you will be OK.

rightflyer

11-24-2005 11:21 AM

RE: ys 63 muffler threads

IS there a simple way to make sure that it is?

Dave Shadel

11-24-2005 03:35 PM

RE: ys 63 muffler threads

Take the plug out and put the piston at TDC

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