This filter installs directly into S&S Super G carburetors.
The patented Grim Fuel Filter installs directly into the float bowl and replaces the float needle seat on the S&S Type G carb. The top of the filter is 1/2-20 threaded and creates a seamless integration into your carburetor. This screw-in filter allows you to run a fuel filter with your S&S Type E carburetor on your Harley Davidson, eliminating the need to find a place to install an in-line fuel filter. CNC machined from solid brass for a beautiful custom finish. The inside of the filter is fitted with a 3/8 extension socket slot that makes install and removal of the screw-in filter simple, and the filter housing is sealed with Viton o-rings.
PLEASE NOTE, THIS FILTER HAS BEEN
UPDATED WITH A 1/8" NPT FITTING ON A 90° ELBOW
Why this filter is so awesome, and why you really should be running it on your S&S Super E or Super G:
- Fuel is dirty. From the time fuel leaves a refinery, to the time it gets into your fuel tank, there are multiple opportunities for contamination. Clean fuel performs better, and contaminated fuel will cause damage to your motor.
- Your tank is dirty - especially older bikes. The element filters down to 10 microns. This ensures that any contaminants from the fuel or your tank are filtered out. You will be surprised how dirty your tank is. We highly recommend you pull your tank and give it a good rinse at the same time you install this filter. All the crap that's floating around in your tank will get stopped by this filter. If you all the sudden have a fuel delivery issue, you're proving to yourself that our filter works.
- Fuel lines corrode over time. This filter installs directly into the float, making it the absolute last line of defense against contaminated fuel entering your motor.
- Prevents vapor lock. There is no room on your bike to mount a traditional inline fuel filter, other than directly between your cylinders, which is one of the hottest areas on your bike. This leads to increased fuel temperatures, and eventually boiling fuel, which causes vaporlock. The Grim Fuel Filter installs safely away from the motor, thereby reducing fuel temperatures and eliminating vapor lock issues.
- Substantially better performance. A traditional inline filter will not clean anywhere close to 10 microns, and using an inline filter can cause more problems than it may prevent. Also, due to the mounting location of an inline filter, they tend to bang against your cylinder walls and fins, eventually causing fin damage.
US Patent # 62/917,425
Installation is quick and easy. We recommend you check your float height and replace your float needle, float gasket, and accelerator pump O-ring during install to ensure proper performance of your S&S carb. A float gasket & needle kit is available with your order.
A) we highly recommend you upgrade your needle. if you're running a stock S&S needle from the 90's your needle will not operate correctly in this filter. In the last 20-30 years you should have already upgraded that needle to a new style anyways - so if you have the old style, it's time for a new needle. Needles have viton tips - and viton eventually wears out and may not seat up to a fresh surface like a new needle will, so just buy a new needle - it's a cheap and easy upgrade.
B) this installation is very simple, but if your mechanical skills are not there, or you are one of those guys that think you know what you're doing, but turns out you really don't... or you install the thing and it's not working or it's leaking or your float is overflowing - chances are it's user error and time for you to take your bike to a real shop and have a qualified mechanic do the install for you.
C) your tank is already dirty, so do yourself a huge favor and pull your tank and petcock and give them a good rinse when you install the filter so you're starting with a clean fuel system.
All the junk that's floating around in your gas tank will eventually make it through to the filter, and the filter is designed to catch all that junk. If you start having a fuel delivery issue this means 2 things: 1 -the filter is doing it's job preventing contaminants from entering your motor, and 2 -your tank or your fuel is dirty. See item C above.
The filter element is designed to last a lifetime and will require the occasional cleaning, especially if you've got a filthy old tank or run dirty fuel. We designed the filter with a reusable element so you're not buying a new element every year. You can clean it with brake or carb cleaner, or just some soap and water. The element is not exactly fragile, but it is expensive, so take care of it and it will take care of you.
- 1. This is an easy install, but...
IF YOU DON'T KNOW WHAT YOUR DOING HAVE A QUALIFIED PROFESSIONAL DO THE INSTALL FOR YOU.
DAMAGE CAUSED BY MISUSE OR IMPROPER INSTALLATION VOIDS YOUR WARRANTY - NO EXCEPTIONS (EVEN IF YOU THINK YOU'RE A QUALIFIED AND CAPABLE "BUILDER")
- 2. IMPORTANT: PAY ATTENTION HERE, DUDE. THIS THING IS BRASS, AND BRASS IS EASILY DAMAGED IF YOU DON'T PAY ATTENTION.
You will want to use a dab of thread sealer on the npt fitting - so do this install in 1 sitting, otherwise your thread seal will be dry when you go to align the fitting to your fuel line.
ALSO, you're dealing with fuel - do this in a ventilated area and have a fire extinguisher handy. We can't have you burning down your mom's garage.
- 3. Shut off fuel.
- 4. Drain fuel from the float bowl.
- 5. Pull the fuel line and remove the original float seat.
- 6. Remove the NPT fitting and separate the filter halves, being careful not to drop or lose any pieces. Set the pieces on a clean rag or soft surface to avoid causing any damage.
- 7. GENTLY AND CAREFULLY screw the filter half into the float bowl making sure the float needle sits inside the seat as you screw the filter top into the bowl.
- 8. Check that the needle moves up and down without binding. If the needle is binding, you need a new needle. DO NOT ATTEMPT TO MODIFY THE BORE. YOU WILL DAMAGE THE BORE AND VOID YOUR WARRANTY.
9. Using a 3/8 ratchet extension, and your gentle little hands, CAREFULLY snug the seat into the bowl, and then check that you've got proper float bowl height.
Do not over-tighten. Snug is good enough. Over tightening will cause damage, embarrassment, and hatred.
- 10. Reinstall the float to the bottom of your carb.
- 11. Gently install the npt fitting into the bottom of the filter. we recommend using some kind of thread sealer like Permatex PTFE on the threads being careful to avoid getting sealer into the fuel line channel. Just a dab will do - don't go nuts with the sealer and DO NOT tighten this yet - FINGER-TIGHT ONLY DURING THIS STEP.
DO NOT OVER TIGHTEN THE NPT FITTING. IT IS MEANT TO FIT SNUG, SO JUST BARELY PAST FINGER-TIGHT WILL DO THE JOB. YOU WILL NEED SOME SPACE FOR A TURN IN ORDER TO ALIGN THE FITTING TO YOUR FUEL LINE, BUT DO NOT, I REPEAT, DO NOT OVER TIGHTEN THIS THING THREADS. DOING SO WILL VOID YOUR WARRANTY AND WILL REMIND YOU THAT YOU CAN'T FOLLOW SIMPLE INSTRUCTIONS AND THAT YOU HAVE NO BUSINESS OWNING EVEN THE MOST BASIC HAND TOOLS.
- 12. Place the stainless element into the bottom half of the filter making sure it is centered in the element seat. Misalignment of the element will prevent the filter halves from sealing properly.
- 13. Gently screw the bottom and top pieces together, being sure the element remains centered, and there is no gap between the top and bottom pieces.
- 14. With the top and bottom pieces sealed, align the npt fitting to your fuel line. Because you followed instructions and you didn't tighten the shit outta this thing, you should be able to spin the npt with your fingers a quarter or half turn to align it. if you are having troubles aligning the npt fitting and your fuel line, you may need to tighten the top piece into the float bowl 1/4 - 1/2 turn, and then make up the rest of the alignment by spinning the npt fitting.
- 15. Reinstall your fuel line, put your air cleaner back on and shred the roads, dude.