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Discussion in 'Land of the Rising Sun: ADV Bikes from Japan' started by cabanza, Nov 6, 2017.
Holy smokes was my screen full-o-shit!!
Yep, I would call that plugged... Mine wasn't that bad the second time around but I didn't let it get to the point where the engine was cutting out.
I took a careful look at the filter but I don't think there is an easy way of doing an filter bypass and external filter mod like is possible on the VStrom. I am probably going to cut my old filter apart and inspect it to see if there is something I am missing with an external inspection of it. An external filter under the seat would make it a whole bunch easier to fix on a trip.
Link to Vstrom bypass:
I did this mod on my 03 Dl1000 with good results.
Wow. Lots of crap on that filter. So what do you think it’s from, welding slag, flux from out of spec welding methods? Looks like some of the small particles could make it thru the filter and pump. Wonder how the injectors like all that stuff.
This is only the prefilter for the pump, anything that got past this would likely make it's way through the pump and get caught by the high pressure fuel filter that is after the pump.
I still think the filter is undersized for this large of a machine. The Vstrom filter has about triple the filter area of the AT (but it is also $250). A lookup of the AT part number shows that Honda used it on machines from 250cc on up which makes it plentiful and brings the cost down.
Cool. Thanks for the explanation resneckmech. Wow $250 for a fuel filter, sounds a bit steep! I’m outta touch with current prices.
The above conversation got my curiosity up so I took a dremel to my old filter. It didn't have as much crud as I expected but with the element that dark from foriegn material, flow was certainly restricted.
Looking at the outlet from the filter I still don't think we will be able to bypass it easily.
@redneckmech is that filter not replaceable? One has to cut the plastic case just to see the filter?
Correct, the element of the filter is not able to be replaced so you must replace the entire housing. Honda part number 16730-MKA-D82
On a related note, I have everything put back together and fuel in the bike. When I started it up the pump was much quieter than before I changed the filter. If your pump sounds abnormally loud (this is very relative, on my bike I could hear it over the engine running) it may be an indication that the filter is restricted particularly when paired with the bike being down on power.
I had a friend of mine just have this issue two weeks ago and found that same white residue/chunks in the tank. Bike started exhibiting issues around 12k miles with a stumble then stop. His bike was a 2018 ATAS.
On the road, not knowing what exactly was going on, he would fix it by shutting the bike off then back on again. It would work for a bit then stumble like crazy again and eventually stop.
After hearing about it from his riding buddy, I told him I remembered coming across this issue from a thread on the AT FB page. Anyway, after taking the fuel pump apart they cleaned the fuel pump screen and related items. All has been fine since.
Here’s some pictures from the AT FB page.
I had the exact symptoms. I was riding the Oregon BDR and was definitely in the middle of nowhere.......God's country but what a crappy place for this to happen. It only messed with me a few times. I've now cleaned tank & pump and am now running the Best Rest screen and sock. Way more surface area.
Seems like every manufacturer has their own little issues. Really wish that wasn't the case but apparently this dirty tank this was missed by Honda's quality control...........big time.
dirty tanks are pretty much standard on big KTM adventure bikes, honda catching up? :)
Did harley buy honda and no one told us?
@redneckmech have you tried to break down the stuff that is clogging the filters with WD-40. I still think what we are seeing is something put inside the tanks to keep the welds inside the tank from rusting. I assume something similar to Cosmoline. Do you think what you are seeing is paint or a foreign matter that is clogging the tank?
I’m really curious as well of what that stuff is composed of in the tank.
Cosmoline shouldbreak down with gas. It's how I remove it at work...
As best I can tell it is a sealant that was placed on the weld seams and then degraded in the fuel.
I did not try WD-40 however I tried multiple other solvents including medium reducer(for painting), seafoam, brakeclean, Carburetor cleaner, and isopropyl alcohol. Neither of them worked particularly fast but isopropyl alcohol and carb cleaner each seemed to have the most effect.
If you look at the weld seams in the tank in this photo the white stuff that is flaking off is what I found to be the majority of foreign material plugging my filter.
My guess is since this was machine welded what your seeing is the shielding material used on the backside of the weld at time manufacturing like a flux residue if this wes electroseam welded instead of say mig welded that would mKe sense
I cleaned my tank and installed the gugaltech filter last weekend. The cleaning regime I used is as follows: white vinegar (acid), trisodium phosphate (base) to neutralize the acid, water rinse, gasoline rinse. The vinegar completely dissolved the white stuff. I agree with the theory that the stuff is a by-product of the welding process.
I am just having the same trouble. Thank you for the good information.
Did some research into the flux residual theory from the welding process and in all cases use of an acid based cleaner was the recommendation but since we are no concerned with post clean electrical conductivity the process the person outlier earlier is a good base to start from vinigar which is a mild acid and easily cleaned with water. I would used WD40 as my final wipe-down as it displaces moisture or if being really pedantic use 90% alcohol which is hydroscopic and will absorb any remaining water, use hair dryer on inside then do final wipe with wd40.
Ill be doing this to my tank in the next week or so.