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1979CB_Dude
This Just In
Joined: Sep 07, 2019
Posts: 3
Location: Iowa
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 Posted:
Wed Sep 18, 2019 8:54 am |
 
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Hello all - I have a 1979 cb750F motorcycle. In looking through the service manual, I see two possible locations for a bike mounted liquid-filled oil pressure gauge. One option, would be to replace the oil pressure switch(idiot light) which appears to be the leftmost location behind the cylinders. What I am wondering is, can the rightmost bolt (top of crankcase behind the cylinders) be used for this purpose? The right hole cants/leans slightly forward. With either hole would need a 90 degree connector of some sort to use with a fixed gauge. Has anyone done this? Adapter recommendations? |
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Whozaa
Moderator
Joined: May 09, 2010
Posts: 6101
Location: St Louis, Missouri USA
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Wed Sep 18, 2019 9:08 am |
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If you haven't already, please read through the New Members Thread (linked in my signature).
You don't want to mess with the transfer tube that leads from the crankcases up to the head. The bolts that connect it are bored inside to carry the oil, and to provide the correct pressure drop for the head.
The better thing to do is to install the gauge where the pressure switch is. Or add a tee if you want to keep the idiot light. Be aware that the pipe thread on that switch (and thusly in the crankcases) is not NPT, it's BSP. |
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79 CB750F
68 CT90
Hey new guy! Please read the New Members Thread behind this link. http://www.cb750c.com/modules.php?name=Forums&file=viewtopic&t=7149
It contains the rules for forum posting and other valuable info you need to know. |
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Fitz
Turbo-Powered Poster
Joined: Oct 19, 2010
Posts: 6511
Location: The Valley, Los Angeles
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Wed Sep 18, 2019 9:32 am |
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It came off this ratty CB1000C because the thread sealer failed due to engine vibration. |
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Ray #1
Fasterspider retired and is the olderslowerspider now
You must have bumped your head, I don't even have a 4 cylinder DOHC Honda motorcycle anymore but, I am here to help or something.
Arthritis has taken me off the bike but, I still fix 'e |
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Whozaa
Moderator
Joined: May 09, 2010
Posts: 6101
Location: St Louis, Missouri USA
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Wed Sep 18, 2019 11:17 am |
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Personally, I don't see the point of having the gauge down low where you can't see it. I'd rather mount it up by the gauges, or hang it off the handlebars. |
_________________
79 CB750F
68 CT90
Hey new guy! Please read the New Members Thread behind this link. http://www.cb750c.com/modules.php?name=Forums&file=viewtopic&t=7149
It contains the rules for forum posting and other valuable info you need to know. |
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1979CB_Dude
This Just In
Joined: Sep 07, 2019
Posts: 3
Location: Iowa
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Wed Sep 18, 2019 11:34 am |
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Thanks guys! Just what I needed. Will post in the technical forum next time... |
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SeanG
Turbo-Powered Poster
Joined: Oct 14, 2007
Posts: 6547
Location: Seattle, WA
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Wed Sep 18, 2019 11:46 am |
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genesound
administrator
Joined: Jul 24, 2007
Posts: 44966
Location: Studio City, CA
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Wed Sep 18, 2019 12:40 pm |
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Fitz
Turbo-Powered Poster
Joined: Oct 19, 2010
Posts: 6511
Location: The Valley, Los Angeles
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Wed Sep 18, 2019 6:39 pm |
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| Whozaa wrote: | | Personally, I don't see the point of having the gauge down low where you can't see it. I'd rather mount it up by the gauges, or hang it off the handlebars. |
That gauge is visible with the look I take while also scoping every other thing I can hoping to not have any leaks |
_________________
Ray #1
Fasterspider retired and is the olderslowerspider now
You must have bumped your head, I don't even have a 4 cylinder DOHC Honda motorcycle anymore but, I am here to help or something.
Arthritis has taken me off the bike but, I still fix 'e |
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