Exhaust system replacement 1973 750 Commando

Q

quawk

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Have purchased and will be installing my new exhaust system, ie: new header pipes, seals/gaskets, peashooter mufflers, and clamps, (thanks Greg Marsh), to replace the aftermarket exhaust system with turnout mufflers installed by the PO on my 1973 750 Hi-Rider. Seems like I've read in a past thread it's recommended to start the bike and warm it up before attempting to loosen the finned retaining nuts at the cylinder head. Is this correct and do you fully warm it up to normal operating temp before loosening the finned retaining nuts?
 
If the Exh. nuts won't come loose under normal temps. you can try a warm up and see it that helps. The warm up/heat may give you a leg up on gaining some expansion in rusted, tight or overtightened threaded fitting.
Spraying some type of break-free or solvent into the threaded area and letting it soak in can work as well without warm up. If you do heat the engine up it takes a while for the parts to get cool enough to handle. Maybe try some welding gloves but sooner or later you will get bit.
I say all this assuming you have the exhaust nut wrench pictured.
If you are whacking away at the fins on the E nuts in an attempt to loosen them sooner or later one will bend or break. My kids gifted me that wrench as a BD gift and I am glad I put it on my list, right tool for the job and all that.

1716673518796.png
 
Lineslinger said:
I say all this assuming you have the exhaust nut wrench pictured.
If you are whacking away at the fins on the E nuts in an attempt to loosen them sooner or later one will bend or break. My kids gifted me that wrench as a BD gift and I am glad I put it on my list, right tool for the job and all that.

1716673518796.png
Click to expand...
Where would be a good source to purchase the E nut wrench you mentioned and in the pic?
 
quawk said:
Where would be a good source to purchase the E nut wrench you mentioned and in the pic?
Click to expand...
Quawk,
They are readily available at most British bike supply shops.A definite choice for your tool box
Mike
 
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