Product Review - Small In-Line Fuel Filters

Most if not all the CT90's that I have picked up have been non-running project bikes that usually have been sitting out in the weather, which in almost every case has meant that the gas tank had some amount of rust.  While I think I do a pretty good job now that I have some experience under my belt at de-rusting tank, in the end there is always a little bit tucked away in some corner that I didn't get, so I always install an in-line filter on both the reserve and primary gas lines going to the CT90's carburetor.

Given there is not a lot of space between where the gas lines exit the opening in the frame and the carburetor, I went looking for a nice small in-line filter.

The first filter that I tried was a nice compact filter that I picked up off of Amazon.

The picture above is of a used filter from a CT90 where the gas tank still had some very fine rust particles.

At Amazon the filter is a Visual-Filter Slimline Compact Body Filter - 3/16in. -1/4in. FF701C and they cost $5.54 for a package of five.

While I like the size of this filter (about two inches long and 3/4 of an inch in diameter) what I have found with time is that the bronze filter element used in this filter worked well for large particles, but very fine rust particles were making it through and were clogging the jets on my freshly rebuilt carb.  Given the fact that the filter doesn't' have the capability to filter very fine particles that can clog your jets on a CT90, I wouldn't recommend using this filter.

Given that the Visu-Filter wasn't really getting the job done, I went looking for another filter to use on my CT90's.

The filter that I ended up with is also from Amazon and it is the Wingsmoto Fuel Filter Universal Motorcycle Dirtbike ATV Moped Scooters that only costs $6.70 for a pack of ten which I though would be a great deal if they worked.

Here is a picture of the filter:

While the filter is a little larger in diameter at 1 1/8 inches, the length is the same at two inches.  The reason I selected this filter is that I wanted to find something that would perform better with the very fine rust particles I was dealing with and I liked the paper filter element that looked much better then the bronze element on the Visu-Filter.

Here is a picture of the two filters together:

One very slight issue with the Wingsmoto filter was that there was flash left over from the molding process at one end of the filter (the right hand end in the picture above) that was easily removed before use.

Here is a picture of the pack of filters that I received from Amazon minus one that has already been installed on one of my bikes.

Overall I like the Wingsmoto fuel filter and would recommend it if you are looking to add in-line filters to your CT90 which I think is a smart thing to do to help prevent future carb problems.

Helpful Links (Shop Manuals, Wire Diagram, Model Information, etc.)

Link to page with listing of CT90 parts available on Amazon