Exhaust Port Repairs, Plug Readings, and Smokey Starts

Keith gives advice on reading spark plugs, freeing a clutch and repairing exhaust ports.

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by Keith Fellenstein
Ready to take your classic queries: Tech Editor Keith Fellenstein.

Exhaust port repairs

Q: Do you have any suggestions as to Norton Commando exhaust port repairs? Should I have the ports welded up and rethreaded or bored out and put in brass threaded inserts? Also, anyone you know have expertise in this area? Thank you for your help!
Mark Gwynn/Cleveland, Ohio

A: I’ve had great results from Jim Comstock, but he’s a busy man so you’ll have to be patient. His website nortonmachineshop.com is for information only. You’ll have to drop him an email at one of the addresses listed on that page.

Plug reading

  • Updated on Jun 24, 2021
  • Originally Published on Jun 7, 2021
Tagged with: clutch, Exhaust Port Repairs, motorcycle repair, Plug Readings
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