Pics - '05 California WR450 AIS (smog) setup
Posted November 09, 2004 - 12:36 PM
If it is anything like the R1 street bike, I removed it and pluged the exhaust hole with a bolt. People sell kits, to do this exact removal.
Posted November 11, 2004 - 05:04 AM
Posted November 11, 2004 - 06:53 AM
Posted November 16, 2004 - 10:19 AM
Posted November 16, 2004 - 12:15 PM
Posted November 16, 2004 - 06:03 PM
Posted November 16, 2004 - 06:41 PM
The AIS is powered from a vacume pulse that is channeled in above one of the intake valves, From what I can tell removing it will not do much for performance unless you have the intake and exhaust port welded up and reshaped to remove the air flow air restrictions.
Posted November 24, 2004 - 02:13 PM
AIS is quite possibly the biggest waste of money forced upon motorcycle manufacturers in the last 15 years. This cost is, of course, subsequently passed on to us, the buyers, for the sake of fooling the “greenies” into thinking our toys are not destroying the environment. Never mind the 1000’s of passenger planes with unregulated emissions that take off everyday, or the nice coal burning power plants around the country, it’s your dirt bike that’s killing the rainforests & feeding global warming… but I digress. AIS is essentially like running a carbonated water line to the outlet of a keg tap, thereby diluting the mixture as it leaves the system, so as to say it has less alcohol in it. The keg still has the same amount of beer, with the same alcohol content, now its just being watered down before it goes into your glass. That 400/426/450cc combustion chamber on your bike is still producing the same amount of “evil environmentally destructive” exhaust gasses that it did without AIS, only now they’re diluting what comes out of the tailpipe with “clean” air from the surrounding environment... that's right, the same air they're moaning about keeping "clean" is the very air injected into the exhaust stream so that what comes out of the tailpipe seems less "polluted", & it messes with the machine’s performance at the same time. The only way your really going to accomplish a reduction in produced emissions it to find a fuel that burns cleaner, or more completely... but that’s a whole different subject. Hopefully the greenies won’t catch onto these tricks & we’ll all be able to keep enjoying our toys without resorting to 150cc 12hp engines that run on used canola oil & have a charcoal canister for an exhaust.
I had to deal with AIS on my 98 Suzuki TL1000R race bike, I was able to have a friend machine some block-off plates out of some titanium scrap & bolt them onto the AIS inlet flanges on the exhaust ports, where the hard piping of the AIS system went. Unfortunately, that didn’t cure the fact that the exhaust ports now have a big “cavity” on one side that impedes flow & doesn’t belong there, but I suppose the resulting performance reduction on a 130hp race bike are negligible at best.
Sorry for the rant gents, this is just something I’ve wanted to “spout off” about for a while now.
We now return you to your regularly scheduled thread…