Hi, I've got an 88 1500 with the same cap as yours and the pipe (circled in yellow) going nowhere. Do I understand from what your saying, the cap should have a pipe coming off it connected to the copper pipe? I've run my bike for 4 years like this and do occasionally smell petrol. I assume it's from this pipe. Thanks, Jim
To identify the emissions package on the bike there are a couple of 'flags' and one dead giveaway.
- The fuel cap with a hose is part of an extended evaporative emissions control system not (generally) found on the 49-state bikes.
- There will be a vacuum hose routing diagram on the fuel tank (lthat'd be under the front of the seat) for CA models (I've seen a few of the diagrams, but I believe that they're for CA only in 88-89)
- There is an additional charcoal element that is screwed into the air filter taking roughly 1/4 of the available filter space (left rear corner area of the filter is where the charcoal element is fastened) - usually NOT installed if someone priced the CA-only air filters:shock:
- The Dead-Giveaway would be to look at the emissions label (a "Vehicle Emissions Control Information Label" is required for all US models) that'll be affixed to the right side of the frame usually at the front edge of the space covered by the battery cover. The label would indicate if the bike was certified to the US emissions or to California emissions
If it all comes down to being unknown still, you could have a dealer run your VIN, Frame, or Engine's number (VIN probably best) to see what market it was built for.
If memory serves me correctly, the CA models also have a carbon canister that is plumbed to collect these evaporative emissions as in - line to the fuel cap, line to that funny metal pipe (the cab float bowl vents) and probably one to the air filter box. The intent of that canister is to use a weak vacuum in the canister to "draw" HC emissions from the connected systems into the carbon media in the canister, then on the bike's next start allow the stored HC vapors to be drawn into the engine's intake for combustion/conversion into some other pollutant (heat, noise, power, etc)
As for leaving the hoses disconnected being a "trouble" for the bike... I don't believe that it would have major impacts, HOWEVER... The calibration of the computer and jetting should address the flow of gasses that will be entering from the evaporative canister (ok really ought'a, but I have none of the running code for the computers or specs on CA-specific carb changes). I'd suspect that on the grand scheme of things, I'd suspect that as long as you do not un-cap any vacuum source you'd be OK (the canister 'prolly has a temperature or vacuum-level sensitive control on however it's routed back to the intakes)...
That said, I'm blaming the disappearing polar ice shelf on you two guys :cooldevil: