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1983 vt750c
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Who would want to look at their master cylinder sight gauge when riding? That's something you would check when doing a pre-ride walk around which would be much easier to see when facing the front. Also easier to top off that way. Who would sit on the seat to fill the master cylinder?
Yes doing the precheck it's easier to see the front but just as easy to see when its facing the rider. While topping off I dont really pay attention to the sight glass I look at the fill line inside the bowl though you can easily see the sight glass from the inside of the bowl. While riding anything could happen, having the ability to see your fluid level while riding is just saftey and ease of mind. Imagine not having or not knowing the fuel level while your riding, would never know when you'd need to take the next exit or pull over, same idea for seeing your 2 most important fluids.
 

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1983 vt750c
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I couldn't check my master cylinder as I am going down the freeway at 70 and everything is vibrating and buzzing including my eyeballs.
Good point but the bubble also vibrates. Also really hope that's not how you actually see things while riding, would be very unsafe lol
 

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funny you should mention the sight glass facing the front anigrelli. I recently got into a argument about how the fjr1300 sight glass was facing the front, and it was first time i had a bike that had the sight glass facing the front and not the rider. To me it makes more sense to have it face the rider so you can glance at it when you are riding. But now at least i have had 2 bikes with the sight glass facing the opposite way :)
Yea same here first bike with it facing the front instead of the rider. Forgot to give you a link for the ones I got. They are very well made good product but when you replace the clutch one you'll need to figure a way to adapt the choke. I used jb weld epoxy stick and cut the mount for the choke off the old one and attached it to the new one its not pretty but it works and keeps the stock cable and function. Not sure if I'll keep it this way, I might figure out or engineer or even maybe 3d print a different mount or choke assembly.

 

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Discussion Starter #24
I was watching some youtube videos on fixing the sight glass. Some people put dimes in there, sure you lose the ability of knowing how your fluid is. But at least there wont be any arguing where the sight glass should be facing.
 

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1983 Honda vt750 Shadow
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This may seem silly, but how many times do you look under the hood of your car at the master cylinder ?
If you suspect a fluid leak then you check often and fix it. More important on a bike of course, but how many times do you need to check it? Any sight glass is a good sight glass.
Just sayin'.
 
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Discussion Starter #26
This may seem silly, but how many times do you look under the hood of your car at the master cylinder ?
If you suspect a fluid leak then you check often and fix it. More important on a bike of course, but how many times do you need to check it? Any sight glass is a good sight glass.
Just sayin'.
Thats a good point.
 

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1983 VT750C
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I replaced the sight glasses in the clutch and brake master cylinders with some glass discs I found on the internet. I still have about 16 left. If I had your address I could mail you a couple. They are 15.6 mm dia. and 3.1 mm thick. My email address is [email protected]. I installed using JB weld.
 

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Discussion Starter #28 (Edited)
I got the ignition fixed today. Having the key seems to work. The keysmith charged me 85$ for 2 keys, at least i can open up the gas tank.
 

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Discussion Starter #29 (Edited)
I replaced the sight glasses in the clutch and brake master cylinders with some glass discs I found on the internet. I still have about 16 left. If I had your address I could mail you a couple. They are 15.6 mm dia. and 3.1 mm thick. My email address is [email protected]. I installed using JB weld.
I just finished using a dime to fix it. But if it leaks ill ahve to hit you up. Thanks for the offer. It's tough to use all 16 sight glasses.
286822
 

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Discussion Starter #31
While workign on the shadow there is this vent hose, it doesnt seem to be attached to anything. I would imagine it would go to the tank, and it is rounted down near the shock
286821
 

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Discussion Starter #32
when i turn the ignition... should the fuel pump make any noise? Normally there is a bit more noise in other bikes
 

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Discussion Starter #35
Removed the carbs to clean, but they were very clean. Im guessing the previous owner cleaned them and the bike just sat for a while. But at least i was pleasantly surprised

 

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Discussion Starter #36
After a good day of messing around, installing the ignition, getting a new key made the bike lit up. Well the lights anyway. It cranks, but does not fire up and run. I am thinking my fuel pump might be out
 

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If that hose is about 3/8 (10MM) size it is probably for the carb bowl vent and just goes down behind the engine in case the bowls overflow.
The fuel pump will not run continuously, only when the bowls get lower. ON-DEMAND type pump. Loosen the drain screw on each carb to see if there is fuel inside.
If the kill switch is off or the contacts are dirty, the starer will crank but there is no power to the ignition.
 

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when i turn the ignition... should the fuel pump make any noise? Normally there is a bit more noise in other bikes
So I have an 83 but pretty sure the 85 is the same way the fuel pump will only get power when the engine is running or cranking like when trying to start it. The pump gets power from the cdi box for the front cylinder via a blue wire, this wire gets power also from the front cylinder ignition coils. If your not getting any change in voltage on the blue wire on the wire harness for the fuel cut off relay, when your cranking the engine or when its it's running, then either your front cylinder ignition coil is bad or the front cylinder cdi box is bad. Had an issue recently where the cdi box being bad made the fuel pump not get the power. If your not getting spark and the fuel pump isn't getting power then the ignition coil for the front cylinder is bad. But the pump will only flow when the carb valve is pulled down by the floats aka low fuel in the bowls. Disconnect the fuel pump and run postive and negative to the leads there should be a solid black and then if I remember correctly the second wire is black and blue. Postive is the black and blue and the ground is the solid black. Stupid that the fuel pump ground is black and all the rest of the ground wires on the bike are green. Dont run it dry for too long if you dont have it connected to fuel lines. Unfortunately you cant get a new pump from honda but can get a second hand or aftermarket from amazon for 70 otherwise you can get a pump from a newer model year as long as it's a two wire and want to make new fuel lines and hack some wires.

If I'm seeing the picture correct that is the overflow hose for the carbs in the event they do overflow the fuel will run out both carbs into that line and instead of all over the engine the hose runs underneath the battery and ends under the frame next to the output/drive shaft. That hose ends right by the other overflow hoses like the coolant overflow and the blow by oil overflow hoses.

For peace of mind definitely clean the carbs real good and replace the jets can get new ones from honda via bikebandit or another parts dealer.

Ensure your getting spark to all 4 of the plugs. See if the fuel pump is working and the carbs are getting fuel. And make sure if you havent done it already drain and change the oil.

Jealous of how clean your carbs are vs how bad mine were when I first got my 83.
 

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Discussion Starter #39
I tried to see if the pump work by connecting it directly, it doesnt seem to do anything just an initial click. So i wonder if the pump is out. Also i am getting sparks in the coils
 

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Did you test it while it was connected to fuel lines with fuel? If so then that initial click is fine and it wont continue to click unless the bowls are empty disconnect the feed fuel line to the carbs and have it end into a cup and then test the pump and see if it will continuously click and pump fuel without stopping
 
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