Author Topic: fuel filter 1980 cb650  (Read 2727 times)

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Offline cb650 bobber

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fuel filter 1980 cb650
« on: April 14, 2008, 06:57:29 AM »
was looking below the petcock as I am getting ready to switch tanks....and saw what looks like a little fuel filter and I was thinking it might be a good idea to replace it while I am taking the tank off...do most auto parts stores stock these..didnt know if 750's and other sohc used the same filter.
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Offline Gordon

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Re: fuel filter 1980 cb650
« Reply #1 on: April 14, 2008, 07:02:27 AM »
None of the sohc4's have a factory in-line fuel filter.  It's fairly common for them to be added by subsequent owners, though.  If the stock petcock filter is in good shape, then there's really no need for an in-line.  If it isn't in good shape, or isn't there at all, you have the option of replacing it with a new one or using an in-line filter instead. 

Some people have had problems with fuel line routing and getting air trapped in the in-line filters, but that's never been an issue with any of mine. 

Offline cb650 bobber

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Re: fuel filter 1980 cb650
« Reply #2 on: April 14, 2008, 08:07:05 AM »
so I could replace it with a generic one ...I cant look at it right now...so there wont be any part numbers for me to use.....
"I make a point of staying right at the edge of poverty. I don't have a pair of pants without a hole in them, and the only pair of boots I have are on my feet. I don't mess around with unnecessary stuff, so I don't need much money. Von Dutch

Offline cb650 bobber

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Re: fuel filter 1980 cb650
« Reply #3 on: April 14, 2008, 08:11:46 AM »
in other words what would I look for when going to by one is this an off the shelf jobby or would I have to order it ...I heard it has to be cylindrical.
"I make a point of staying right at the edge of poverty. I don't have a pair of pants without a hole in them, and the only pair of boots I have are on my feet. I don't mess around with unnecessary stuff, so I don't need much money. Von Dutch

Offline Gordon

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Re: fuel filter 1980 cb650
« Reply #4 on: April 14, 2008, 10:33:54 AM »
Off the shelf, order online, whatever works for you.  Just make sure it's the right size for the fuel line you have. 

Offline TwoTired

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Re: fuel filter 1980 cb650
« Reply #5 on: April 14, 2008, 04:38:11 PM »
If you only have an inline filter, it traps particles and becomes more restrictive over time and use.  Therefore, it must be replaced periodically and be added to routine maintenance and bike check ups.

The in-tank stock Honda filter (on the petcock inlet) has a mesh fine enough to stop anything that can block orifices in the carbs.  (Who cares if it can flow through the carbs and out the exhaust?) Plus the sloshing fuel in the tank keeps it clear enough to provide good flow (essentially self cleaning).  If you get enough cr@p in the tank you simply flush/clean the tank.
If your selected inline filter doesn't have a mesh or media finer than the in-tank one, it won't trap anything and is effectually useless.

There have been reports on this forum of particles that defy physics, make it past the fine mesh in the tank filter, and are either trapped in their beloved in-line filter, or clog up their carbs if they haven't got the miracle inline filter. 
They didn't report being members of the flat earth society, but I wonder... 
Could the internet extend to alternate universes where the laws of physics are different than the one many of us live in?
Maybe in some universe the particles have sentience and have developed transporters to bypass Honda mesh barriers.  I might guess, then, that in-line filters have Heisenberg compensator defeat technology so these smart particles can't jump those barriers and become imprisoned for all time.  But, I digress. ::)

Oh, and before you ask, yes I AM bored. ;D

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