SOHC.co.uk Forums > CB750
Vacuum screws
Laverdaroo:
--- Quote from: Trigger on August 31, 2023, 05:42:13 PM ---
--- Quote from: Pauarc on August 31, 2023, 04:05:50 PM ---Does anyone know what size the vacuum screw on carb on cb750k are like to change them they are a bit damaged
--- End quote ---
M5 with a 5mm thread ;)
--- End quote ---
Not entirely correct that….
Surely if it’s an M5 bolt, it’s telling you it’s 5mm, the pitch of the thread is what your after in that question in which case it’s only one of two options .08 or .09, that’s all it can be. Not in the workshop so can’t check but if you have a tap and Dye set use your thread gauge and find the matching pitch in that particular screw. Simples
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Matt_Harrington:
Roo, I think he means 5mm long....
Trigger:
--- Quote from: Laverdaroo on September 02, 2023, 10:08:13 AM ---
--- Quote from: Trigger on August 31, 2023, 05:42:13 PM ---
--- Quote from: Pauarc on August 31, 2023, 04:05:50 PM ---Does anyone know what size the vacuum screw on carb on cb750k are like to change them they are a bit damaged
--- End quote ---
M5 with a 5mm thread ;)
--- End quote ---
Not entirely correct that….
Surely if it’s an M5 bolt, it’s telling you it’s 5mm, the pitch of the thread is what your after in that question in which case it’s only one of two options .08 or .09, that’s all it can be. Not in the workshop so can’t check but if you have a tap and Dye set use your thread gauge and find the matching pitch in that particular screw. Simples
Sent from my iPhone using Tapatalk
--- End quote ---
The Question was: What size the vacuum screw; and the bolt is M5 with a 5mm thread length. He never asked the pitch but, it is JIS standard 0.8 ;)
Oddjob:
If that's the case he should have written it M5x5mm. Thread refers to pitch not length, especially as there are screws and set screws. It's an 0.8 pitch BTW which is vital to know if your not replacing like for like as in using stainless ones instead.
Trigger:
And there are copper screws which the 750K has. ;)
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