I kept my EVAP Can on and look what happened...

[tonUPRacer]

Well, that was fun. Still smilin'

As an aside, I'm on my 2nd tank of running lower octane gas (89-88) per Sonic's suggestion that it would eliminate the cold start issue. So far it does seem to improve the cold start symptoms of hunting idle, but I did experience engine knock once when I let the rpm's drop and lugged the engine. I'll probably keep running the lower octane fuel to continue the experiment. Carry on.

[barenekd]

The carbon in the fumes in the can are sucked into the intake manifold, remember the screw he put in one tube? That tube goes from the can into the manifold. It carries the gunk into the engine. It may have no effect on the fuel filter, but it does add carbon deposits to your combustion chamber. Another tube is the breather tube to the tank. It's there to capture the fumes from the tank that are sucked into the intake. These fume can also be sucked back into the tank as the pressure changes due to fule usage and temp changes. Those fumes can carry the charcoal back into the the tank. It's not like there any one way valve on the vent tube    
Royal Enfields have a maintenance item in their owner's manual under Preventative Maintenance to decarbonise your piston every 18,000 miles. I pitched the can on mine so that would help alleviate the problem. But in retrospect,that could be a leftover from the 1955 manual that they just boiler plated. It's a bloody cinch they didn't completely rewrite it.
Bare

[Vasco DG]

What I think we are seeing here is a superb example of why people who don't understand how stuff works should simply LEAVE IT ALONE!



Pete

[tonUPRacer]

What I think we are seeing here is a superb example of why people who don't understand how stuff works should simply LEAVE IT ALONE!



Pete

or in my case, put a sticker on it.

[rodekyll]

The carbon in the fumes in the can are sucked into the intake manifold, remember the screw he put in one tube? That tube goes from the can into the manifold. It carries the gunk into the engine. It may have no effect on the fuel filter, but it does add carbon deposits to your combustion chamber. Another tube is the breather tube to the tank. It's there to capture the fumes from the tank that are sucked into the intake. These fume can also be sucked back into the tank as the pressure changes due to fule usage and temp changes. Those fumes can carry the charcoal back into the the tank. It's not like there any one way valve on the vent tube    
Royal Enfields have a maintenance item in their owner's manual under Preventative Maintenance to decarbonise your piston every 18,000 miles. I pitched the can on mine so that would help alleviate the problem. But in retrospect,that could be a leftover from the 1955 manual that they just boiler plated. It's a bloody cinch they didn't completely rewrite it.
Bare

As I said before, they don't just empty an ashtray into a bottle and strap it to the bike.  It's a FILTER.  It's designed to keep itself intact indefinitely, and decades of no problems in any other industry using charcoal filters seems to prove the technology.  So, where do you imagine your huge volume of loose charcoal is coming from?

[HDGoose]

What? You don't like gas dripping out of your bike any time you park it in the sun?

Never a problem on my 97 Cali 1100i.

[Vasco DG]

Also thee is the fact that the orifices in the elbows to the manifolds are tiny! If great chunks of carbon were being 'Sucked' down the lines they'd immediately become clogged. C'mon guys, just think about it logically.

As for the de-coking as mentioned in the RE manual? That's a hangover from the bad old days of crappy fuel and lousy fuel metering devices. I don't think I've seen an engine that needed de-coking to maintain its performance in thirty to forty years! ::)

Pete

[CalVin2007]

Also thee is the fact that the orifices in the elbows to the manifolds are tiny! If great chunks of carbon were being 'Sucked' down the lines they'd immediately become clogged. C'mon guys, just think about it logically.

As for the de-coking as mentioned in the RE manual? That's a hangover from the bad old days of crappy fuel and lousy fuel metering devices. I don't think I've seen an engine that needed de-coking to maintain its performance in thirty to forty years! ::)

Pete

       Right. Decoking was needed when leaded fuels and oil burning were the norm, not much needed anymore unless your engine was built in some third world country from blueprints drawn up three quarters of a century ago.

  Terry

[oldbike54]

Ohhhh , that kind of decoking  ??? ;D Thought for a minute you guys were talking about OU football  :o
   Dusty

[rodekyll]

Ohhhh , that kind of decoking  ??? ;D Thought for a minute you guys were talking about OU football  :o
   Dusty

no, that's CORKING, and it's baseball.

[oldbike54]

no, that's CORKING, and it's baseball.

 :D Actually that was a reference to the rampant cocaine use by OU football players in the 70s and 80s . Funny thing is , as long as the team won , no one cared , and OU got the best players money (or coke) could buy . They did win ,
A LOT ! :D
   Dusty

[Kev m]

I was working in the garage today and realized that I never took a picture to show off the great EVAP Canister sticker Andy sent me.

I think it looks great!

THANKS AGAIN!!!!

[fotoguzzi]

It does look great!

[clubman]

Good for you! Still have mine on my '09 V7C, still works perfectly. I may have to give it a little love after seeing this.Thx

[cruzziguzzi]

Probably time to start a rumor/lore about these as with "thin blue line" stickers, fairy bells, combat tassles and the like.



"Say, Bob, what's the story with that smiley face?"

"Oh, that? They're only given to.... wait, lemme see yer... uh, nevermind. So, how 'bout them Patriots?"

The hipsters will be slathered with them. :BEER:

Todd.

[Kev m]

Gremlin EVAP canisters!

[rodekyll]

Oh -- this one resurfaced it's ugly head.  It was fun last year . . .    :pop

 . . .and as a follow-up on my canister hose questions -- this is a timely topic.  I mounted the cans last weekend per the very helpful diagram and constructive comments about the plumbing.  I pressure tested my two fuel tanks after braising in the bungs and plugging the bung holes.  One had no leaks @10# (waaaaay higher than is probably possible in a normal world).  The other leaked at a bung braise, but only above 8#.  I redid that one and both tanks now pressurize to the point of expanding slightly -- and not unexpanding.   >:(  I had to subject them to a straight diet of rubber mallet to get them skinny enough to shove into the wells they live in.  A bench test verified the venting system.  No, I was not able to pass charcoal out of the cans and into the injectors, even with significant pressure and vacuum.  

I think we could put the myths to rest forever if someone had sufficient 'hold my beer' in them to cut the top off and look inside*.  According to the mfgr, we should see encapsulated charcoal bound to a matrix.  I suspect it would look like a tightly wound cloth or mesh with entrained charcoal.


* DO NOT take me up on this unless you have some way of cutting the can lid off without blowing yourself up.  These canisters collect fuel fumes for a living and may object to heat or spark-generating methods of getting inside.  Fear of flying is the reason I have not done this myself.