Did I use too many big words for you or something?
Maybe you've never had a Twin Cam motor, or maybe you have never had one that would stall out after coming off the throttle and unable to locate proper idle speed.
The oil mist that gets dumped into the intake causes an oily film to build up on the sensor (located in a hole at the 12:00 position of the intake throat, circled below).
I have the Willie G cover on an open filter, which requires a ton more work/effort to remove than a stock airbox & filter assembly does.
Adding the catch can has eliminated the need for me to remove the air cleaner assembly and clean out the intake/IAC sensor.
I used a combination of AN fittings, a small breather filter, the catch can, & a custom bracket to keep it all from shaking apart.
After about 1,000 miles, there is basically zero accumulation in the catch can.
you're right, I never had 'A' Twin Cam motor, more like many of them, along with many friends that have had many of them, over many years and many miles...none of us have ever dealt with your obviously widespread inherent design flaw problem, rather they all just kept rolling along and running the same for tens of thousands of miles..guess we all should have been cleaning them every 2000 miles without realizing how necessary it is because you say so..you had a TC that required you to clean the IAC every 2000 miles, I can guarantee you out of the millions of TCs sold that is not a regular recommended or required maintenance service item that owners performed....btw..what kind of oil do you recommend?
Looks like a DK customs catch can. They have some good info on their website and YouTube channel about them.
like others have said, helps keep oil vapors out of the intake. Which can build up on intake valves over time. I personally just did external breather bolts when I switched to a DK customs intake on my bike. And I also run a catch can on my silverado 1500. I get a little bit out of that every few thousand miles. But really a catch can is more important on direct injection engines where you don’t have the fuel “washing” The intake valves, and so carbon build up on intake valves has long been a problem with direct injection engines like Volkswagens, and more and more makers now that DI is the go to. And the benefits are much more apparent on those applications. And on my silverado I know for a fact it keeps my intake much cleaner, I cleaned the throttle body when I put the catch can on, and haven’t had to clean it since and I check it every time I change the air filter. I would have no problem buying that bike
Last edited by 2500hdon37s; 02-09-2022 at 11:37 AM.
I had a catch can on mine before I had to change my intake. Mostly water with a little oil mixed in. Decided it wasn't worth it when I put the SE Heavy Breather on it. I don't even think about it anymore.
Catch cans are frequently found as add on to performance vehicles. You would be surprised how much "blow by" oil will be trapped in a high performance engine. There's lots of pictures of carboned up Harley heads and pistons attributed to the oil vapor blow by.
high performance engines/ vehicles are also built much “looser” with larger piston ring gaps to allow for boost, nitrous, and higher compression ratios so that’s also naturally going to build more crank case pressure from the blow by which really a catch can is just a safe and clean place for the oil vapors to exit into when being vented.
Not a requirement for a stock twin cam, but I think any little bit you can do helps. Also is common for twin cams to be a little over full on oil which really makes for a lot of oil vapor to come out of the crank case vents.
you're right, I never had 'A' Twin Cam motor, more like many of them, along with many friends that have had many of them, over many years and many miles...none of us have ever dealt with your obviously widespread inherent design flaw problem, rather they all just kept rolling along and running the same for tens of thousands of miles..guess we all should have been cleaning them every 2000 miles without realizing how necessary it is because you say so..you had a TC that required you to clean the IAC every 2000 miles, I can guarantee you out of the millions of TCs sold that is not a regular recommended or required maintenance service item that owners performed....btw..what kind of oil do you recommend?
no need to read, real life experience over many years and miles of ownership tells me I didn't and don't need a catch can or clean my IAC every 2000 miles..commence fussing and fretting over whatever you like..I'll commence just riding and not worrying about insignificant things, as always
no need to read, real life experience over many years and miles of ownership tells me I didn't and don't need a catch can or clean my IAC every 2000 miles..commence fussing and fretting over whatever you like..I'll commence just riding like always
Not saying you didn't or don't have a problem. Just thought you might actually be willing to read about others that have had.
I also don't have a catch can BUT I do often have to clean my IAC when the bike starts acting up/dying when slowing down. No idea how many miles between cleanings since I don't keep track.
Not saying you didn't or don't have a problem. Just thought you might actually be willing to read about others that have had.
I also don't have a catch can BUT I do often have to clean my IAC when the bike starts acting up/dying when slowing down. No idea how many miles between cleanings since I don't keep track.
yeah, after so many years and bikes and miles without any single issue related to this topic I don't see the need to educate myself on its stated or perceived merits..if it ain't broke, keep riding I say
02-09-2022 | 10:39 AM
