Emissions and fuel delivery

[ta-kid]

Does a 2012 Venture have a Caytilitic converter?Secondly are the Venture motors jetted lean for emmisions?Would richning up the carbs help in anyway.

[MikeWa]

The Venture uses an ais system for emission reduction. There is no power loss associated with this system. So long as yours is not a California model it is probably just fine. (I just have no experience with the California models)

Mike

[allwx]

No cat converters on the Ventures. This is an old fashion design, very old.

 

They "may" be jetted "lean" for whatever reason, but the field elevation where the bike is operated is going to be the big determinant on jetting. You might look around for a carb expert in your neighborhood to find out what they do to bikes to make them run best where you live. I think of the factory setup to be a rough estimate. It is good enough, but probably not the very best. Rather than too-lean, it seems more likely that these Ventures come too-rich, at least so if you live in a mountainous region. There is an article by Goose that describes setting the floats in the carbs, the end result of which is to lean out the mixture. I did this adjustment soon after I got the bike, and my mileage improved markedly, though I could detect no change in how the motor runs.

 

The adjustment is difficult, requires removal and partial disassembly of the carbs, and working on some rather delicate internal parts. It is an adjustment that is straining out a gnat. Won't likely make any discernible difference in operation, but you may notice a fuel consumption improvement. If your bike is running fine as it is, and you aren't a big tinkerer, probably better to do nothing. This might be especially true if you frequently ride into remote areas that are much higher or lower in elevation where you live. In that case you'll want the factory setup because it is a middle-ground kind of thing.

[ta-kid]

Yea I thought they did not have a cat,which is surprising in this world of tough emission standards.I did read some of the carb threads and understand all the issues surrounding the carbs ,since i posted this thread.