Author Topic: 1977 750 FourK stripped exhaust head threads  (Read 416 times)

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Offline NateMinn

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1977 750 FourK stripped exhaust head threads
« on: March 26, 2025, 09:03:40 PM »
I'm getting mixed results searching for the size stud. I think I need the 50mm but for the bolt, I see some M6 and some M8.
So I need to tap the head and get a helicoil in or can I tap to the next size up stud? Any advice is appreciated.
Thanks!
1977 Honda 750FourK, stock, 50,000 miles.

Minnesota

Offline bryanj

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Re: 1977 750 FourK stripped exhaust head threads
« Reply #1 on: March 27, 2025, 06:15:31 AM »
First helicoil then if thatvgoes you can still go up a size
Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!

Offline MauiK3

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Re: 1977 750 FourK stripped exhaust head threads
« Reply #2 on: March 27, 2025, 07:36:12 AM »
try Yamiya, they may have them
1973 CB 750 K3
10/72 build Z1 Kawasaki

Offline MRieck

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Re: 1977 750 FourK stripped exhaust head threads
« Reply #3 on: March 27, 2025, 08:22:05 AM »
First helicoil then if thatvgoes you can still go up a size
👍.  Getting the correct angle is the tricky part.
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Offline bryanj

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Re: 1977 750 FourK stripped exhaust head threads
« Reply #4 on: March 27, 2025, 08:32:27 AM »
Very true Mike, that bit does come with practice
Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!