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Does anyone use one of these. Is it necessary? Just nice to have? 
Maintain thy airspeed, lest the ground arise and smyte thee.
A mile of highway will take you one mile. A mile of runway will take you anywhere.
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Used properly and sure cool to have  makes others think YOU know what your doing, 
I use an oil temp dip stick,have and plan to put in pressue also(  Winter) Heat like past summer 100+ deg.  for few wk's (Mid-West U.S.),My battery boiled (twice)being so close to oil bag,THAT IS TO dang HOT .
Would not allow it to get that HOt,Oil change , new Batt.  I'd invest and know how to judge correctly.
1977 CB750 F2 Super Sport
<LET THOSE WHO RIDE DECIDE><RIDE TO LIVE-LIVE FOR JESUS>
Native American from central Cal, Kickstand UP in S.W.Missouri,
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Pressure gauges are nice to have, yes. I've heard bad things about oil-filled pressure gauges, but it is all hearsay, no personal experience with them. One thing to consider on this model, is that it is very low, and likely difficult to read, while driving.
Your bike came equipped with an oil pressure sensor. Unfortunately, it has a threshold trigger: once the pressure drops below its threshold, the warning light comes on. With a pressure gauge, you will know that your oil pressure is dropping, before it becomes critical.
I installed an oil temperature gauge on my '79, along with an oil cooling system. I mounted my gauges (voltmeter to monitor the health of the battery, and the charging system, along with the oil temperature gauge), on the hard cover of the right-hand pocket on my Vindicator fairing, just under the handlebar. Location is everything. Cheers!
1979 CB750K (sold, 2012, but not forgotten)
1983 Kawasaki 440 LTD Belt Drive (sold, 2011)
1993 Kawasaki Voyager XII
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Cool to have, but by the time you notice a drop in oil pressure, you will need a new engine.  TOOLS
Life is not about the number of breaths, you take, but the moments that take your breath away.
I don't have an anger problem. I have an idiot problem. Hank Hill
Never confuse education for intelligence.
Happiness is a belt fed weapon.
I just can't imagine what could go wrong.
No fire? No explosions? So whats the point of your story?
Those who are too smart to engage in politics are punished by being governed by those who are dumber. ~Plato
It couldn't be done, but the darn fool didn't know it, and did it anyway.
We all got problems. Ksharp
I like vintage bikes because they take me away from the clutter of technology that I work with everyday and back to a simpler time of mechanical elegance and simplicity.. "ninadm"
Darkwing Duck: The worst part of public transportation is the Public.
"That is awesome shit there" Re-Run
"Fear nothing, attack everything" Eric Berry
" Oh, you read that on the internet? Clearly it IS a massive problem. Of course it CAN’t be normal operation."
1976 CB 750-A X 2
1977 CB 750-A X 4
1977 CB 750-K
1976 CB 750 F
1981 CB 750
1966 Kawasaki SG 250
1981 KZ 750 LTD
1973 CB 350
1979 CM 185 Twinstar
1982 Honda XL 80
South of Eden (Kansas City MO)
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Mine almost caused me to drop my bike yesterday. I was pulling up to a stop and the bike has forward controls on it ( probably never run into this one stock foot pegs). When I went to lower my right foot my pants cuff hooked the stupid gauge and the bike was leaning that way.Luckily,my pipes are pretty low and wide and it caught the bike well enough for me to get untangled. Embarrassing and aggravating at the same time.  Yeah,I got one on both bikes. One bike has a braided line with the gauge relocated to the handlebars. Like Tools said,if you cant really keep a constant eye on it,its not worth much. Nice looking piece in that pic,though. I like it
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All very good points guys. Thanks a lot. I lke the idea of running a hose up and mounting the gauge on the handle bars somewhere. Make more sense and probably safer 'cause I just KNOW I'd also catch my pants cuff on the damn thing. 
Maintain thy airspeed, lest the ground arise and smyte thee.
A mile of highway will take you one mile. A mile of runway will take you anywhere.
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Speedway Motors sells a really nice braided line kit for relocating that gauge.It has all the adapters you need to run from the engine adapter(not sure where to source those) to the back of the gauge, and it is only $20. You'll definitely want the 48'' long hose.It's the one I used and it was the perfect length without being too long.
http://www.speedwaymotors.com/Braided-Pressure-Gauge-Line-Kit,4147.html
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Ugh, $20 for the part and $40 to ship it to Canada.
Should I be able to get this stuff from any speed shop? Anyone have any experience getting BST/NPT stuff from fastener or pipe stores?
1981 CB750K with 900 cams
90K KM's, rebuilt head, rebuilt carbs, upgraded valve stem seals
My wife's recipe website that I'm trying to help promote: Strawberries for supper. Yes, I am a lucky man.
My cb750 video site
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Plumbing is plumbing, regardless of oil or water running through the metal pipe fixtures (see note about Teflon Tape, however). I used hardware store plumbing fittings to attach my oil cooling system. The only caution I would offer, is never use Teflon/Plummer's Tape, as it will not seal for more than a few hours, before it begins to leak oil. Instead, use hydraulic sealant, a squeeze tube of paste that cures after 72 hours. Cheers!
1979 CB750K (sold, 2012, but not forgotten)
1983 Kawasaki 440 LTD Belt Drive (sold, 2011)
1993 Kawasaki Voyager XII
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Most flare fittings are made on a 45 degree angle. The mating surfaces, that is. AN fittings are made at a 37 degree angle to prevent you from mixing them up since the Military are pretty picky with their specs. Just make sure you get whatever adapters fit your hose
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THX for bring this up  So ChromeGuy I have this gauge and that hose kit has the fitting that will go in place of that bigg azz plugg thingy,Does any-one no what is needed (can be bought at Lowe's)  Like the thought of seeing while driving My Elc. I can watch as gets hot 115deg.(outside)and flying down dessert HWY...A must have for me,Temp gauge in tank.
1977 CB750 F2 Super Sport
<LET THOSE WHO RIDE DECIDE><RIDE TO LIVE-LIVE FOR JESUS>
Native American from central Cal, Kickstand UP in S.W.Missouri,
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That hose kit from speedway is 1/8 pipe on both ends.Female adapter for the gauge and male adapter on the other end. The big plug that goes into the engine is specific to the bike. I'm not sure where you can get those. I'm sure several bike shops/sites sell them.I've just never had to shop for one.
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most say to thread yourself.witch I don't understand if part type not in hand and then sure not to leak
1977 CB750 F2 Super Sport
<LET THOSE WHO RIDE DECIDE><RIDE TO LIVE-LIVE FOR JESUS>
Native American from central Cal, Kickstand UP in S.W.Missouri,
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What I'm reading on the internet is that the thread in the bike is BSP and most gauges and pipes are NPT. That is the primary reason why you have to centre punch and thread it yourself.
I've found some BSP to NPT adapters but can't find a place that will ship to Canada for a reasonable rate - I'm trying to source locally because I would prefer to just have an adapter, but might end up threading it myself.
Hope that helps.
1981 CB750K with 900 cams
90K KM's, rebuilt head, rebuilt carbs, upgraded valve stem seals
My wife's recipe website that I'm trying to help promote: Strawberries for supper. Yes, I am a lucky man.
My cb750 video site
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So, In replacing my Spark Generator Units (which I melted during the overheat incident) on my '81 CB750C I broke the seal in my Oil Pressure switch. I was thinking of replacing it with a gauge because I eventually want to be rid of my OEM instrument cluster. Do any of you have pictures of how you routed your bar mounted gauges? I'd be interested to see them.
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