Adding a Remote Oil Filter Kit


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kit
The Legend Cycle Remote Oil Filter Kit starts at $157.50 and includes everything you see here, including your choice of oil filter.
Photo by Keith Fellenstein

If you’ve ever rebuilt an older Triumph motorcycle engine, you’ve probably heard from everyone that you must tear it down completely to clean the sludge trap.

It’s true. To completely trust that all that hard work won’t be in vain, you have to clean that primitive oil filter. Once you’ve done that, you certainly don’t want to have to ever do it again.

The best way to ensure that the oil stays clean is for the oil to run through a spin-on filter that can be changed on a regular basis. So for this How-To, we’re going to install an aftermarket oil filter kit from Legend Cycle (legendcycle.net) on this 1968 Triumph Bonneville so you never have to worry about the sludge trap again. Here’s a short link directly to the kit. A printed copy of the instructions comes with the kit, but it can also be found online at Legend Cycle if you’d like to read the instructions before purchasing it. There’s also a video done by Legend Cycle showing installation of the kit — Keith Fellenstein

sludge-trap
Photo by Keith Fellenstein

1. Most of these classics were built to use non-detergent oil. The sludge trap used the centrifugal force of the rotating crankshaft to remove any particles from the oil. If you’re not using non-detergent oils (and you shouldn’t) modern detergent oils will hold those particles in suspension, to be removed by a modern paper filter.

mounting-bracket
Photo by Keith Fellenstein

2. Of course, since this is a classic bike, you don’t want to mar the classic looks with an obvious modern add-on, so we start by hunting for an inconspicuous location for the mounting bracket.



left-side-cover
Photo by Keith Fellenstein

3 .It looks like there is room behind the left side cover, also behind the main frame tube, to hide this from all but the most scrupulous rivet counters.

2VLS
4/9/2021 4:08:38 PM

I installed a filter (from a Triumph 250 single) in the oil return line of my '72 Bonneville. I could see the oil flowing into the OIF tank, but the bike leaked at the head and smoked more than before. A knowledgeable member of our club, the Washington Vintage Motorcyclists, said the return pump isn't strong enough to push effectively through a filter. I removed the filter element and the problems stopped. Thoughts?


Laurie Wookey
4/1/2021 7:34:20 PM

A great conversion, very necessary, however items 9 and 10 should be transposed to make them correspond to the pictures.




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