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Cleaning the throttle bodies
- Thread starter AlanNZ
- Start date
While you can remove them for cleaning, which is not a small job, they can be cleaned insitu as long as you have a cleaner that has a long enough straw on the end of the nozzle. I use Seafoam spray that has 12" (or so) straw nozzle. I go through the air box. You just need to make sure the end of the straw is about 1/2" from the butterfly valve in the throttle body so takes some guiding of the straw.
I spray each throttle body about 5 or six time at about 1800 RPM just to the point of almost stalling. I then turn off the bike and spray about 5 seconds into each TB and let it sit for 20 minutes. Then start the bike and watch the smoke show for a couple of minutes. Then go for a ride and blow any remaining crap out.
I spray each throttle body about 5 or six time at about 1800 RPM just to the point of almost stalling. I then turn off the bike and spray about 5 seconds into each TB and let it sit for 20 minutes. Then start the bike and watch the smoke show for a couple of minutes. Then go for a ride and blow any remaining crap out.
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He said "spraying 5 or 6 times at about 1800 RPM". To turn over that fast, it has to be running.
It can be, but with the engine running it helps to draw in the cleaner and surround the TB and then go into your combustion chamber so make sure the engine is warm when you do it. Seafoam will also clean out carbon deposits from your combustion chamber so a warm engine helps it do its job better.
Keep a good handle on the straw so you don't end up loosing it in the TB's. If you are so inclinded, you can remove the air box to get a better view of the TB's. Once you do that you will see the TB valves and can clean it that way. I have not yet had to remove the air box but from what I hear it is easy to take out but a pain in the butt to put back in so I avoid the whole senario.
Bisbonian
Cruisin' Guzzisti
On my 1200 Sport I found the crud in the throttle bodies really needed scrubbing to get it all out. A simple spray was not enough.
I have no idea how the airbox of the Stelvio is to remove as compared to the 1200 Sport. In the end I'm glad I went to the effort as so much stuff was built up behind as well as in front of the throttle plate.
I have no idea how the airbox of the Stelvio is to remove as compared to the 1200 Sport. In the end I'm glad I went to the effort as so much stuff was built up behind as well as in front of the throttle plate.
Agreed. Also depends on how much oil you have blowing back from the cylinders. If you are careful with the amount of oil you put in the bike it is usually not that bad, but left for a while and it becomes a larger job. That is why I try to do it every year. Hopefully to not get to the point of having to take everything apart. That being said the Seafoam is pretty good. Since it is oil based, it tends to adhere and dissolve the crude better. The normal carb and TB sprays evaporate so quickly that doing it without removing the TB is difficult because it does not stick around long enough to dissolve everything. Just my observation. Seafoam also makes a product called Creep. They say it is better for TB but have not tried it yet. Sounds more like WD40.....maybe we found another use for WD40.
I re routed the engine oil breather on my Breva, instead of going into the top of the airbox it goes into a small sealed bottle. The airbox is completly dry, no oil mist in there and I haven't had to touch the throttle bodies for years.
Bisbonian
Cruisin' Guzzisti
I have done the same, I use a small Red Bull can as it fits right in front of the battery and sort of wedges in under the rear gas tank mount on my 1200 Sport. About every 6 months I need a new can as the thin aluminum cracks, probably from vibration. The last time I wrapped it with aluminum tape first so we'll see if that holds up any better.
Just to be clear, the canister you are using is not fully sealed, right? There is the pipe going in and there is an exit for the air to go out, right?
The hose that goes to the airbox is supposed to be vented. You should not block it of or dead end connect it to a canister. It needs to breathe.
Sorry if I am stating the obvious.
The hose that goes to the airbox is supposed to be vented. You should not block it of or dead end connect it to a canister. It needs to breathe.
Sorry if I am stating the obvious.
Hi GuzziMoto, you are correct, the pipe goes in through a hole in the lid of the bottle and there is a tiny vent hole open to the atmosphere. the oil mist seems to condense on the bottle walls and I clean it out when needed.