The guys at
XS400.COM are great. they looked at my pictures and recommended that I install and Inline Fuel Filter. This little guys prevent dirt and such from plugging your carbs and making a fun day into a bad day. So i went to my local Motorcycle shop picked one up and after so trial and error got it on.
OK Step 1
Look at you existing fuel line and think about what would be the easiest filter to add, one that has an angle of straigh one
Step 2
GO buy the stuff. Get extra line.
Step 3
Turn the Petcock to the "Reserve" or "ON". take off the old line, some gas will leak out of theline but it will be very little.
NOTE: "Reserve" and "ON" positions on the Petcock only flow when the engine is running (they are vacuum fed from the Carbs.. see that short little hose coming out of the back of the Petcock that provided the vacuum.) The Prime position allows it to flow by gravity which is useful for when you empty the Carbs for servicing and need to refill them before starting the Bike.
Step 4
Measure...Twice. I measured the first segment put it on the Filter then attached the rest of the hose to the other end and made a note of where to cut then cut it.
REMEMBER: there is an arrow on the filter showing which way the Gas should flow. Gas Flows from the gas tank through the petcock to the carbs.
IT IS HARD to remove the hose from the filter so make the line little long and trim the extra off before you put it on the bike.
Step 5
Slide clamps onto hose now. Put it on the Bike. Secure the Clamps and turn the petcock to "Prime". watch the filter fill with fuel, when it is full turn the petcock back to "ON".
Step 6
Enjoy
Adding a Fuel Filter