please explain

[98ninja]

trawling ebay and found this
http://cgi.ebay.com/ebaymotors/TPO-Hond ... dZViewItem

another sham?
or is it real? and how does it work?

[Neka79]

i had my 929 apart more times than i care to remember, and id be fucked if i can think of anywhere they would go.... the exhuast valves in the 929 are 4 valves in 4 pipes...

im guessing its sum Californian thing..they have weird emissions..

[Ratmick]

You can get those for the Hornet as well, it's quite a common mod in the US, although the Oz guys that have tried it say it doesn't make much/any difference.

I gather the US model, specifically the California variant, may have much more stringent emissions controls than the Australian model. I think these plates bypass the system.

Mick

[98ninja]

https://www.tpoparts.com/products/55

recognise that part?

[Gosling1]

Any motorcycle sold in California has different emission controls from the other 48 states ( or 49, whatever) - in the US, they refer to all the other bikes as '48 state' bikes, which means that they are much the same as the ones you and I get here in Oz. Not like the Californian models at all.

The Californian model ZX12R for example, had a charcoal canister in the underseat area !! as part of the emissions controls.

Those 'block-off' plates replace the standard reed-valve outlets which are located in the exhaust side of the cam cover. Don't know exactly how these work, but I believe they allow a one-way flow of engine vapours (which may or may not have some form of oil mist in it), up through the reed-valves and back into the emission system.

Its as ugly as a hatful of arseholes, and the yanks have been doing emission control valves like this on road bikes for decades - back as far as the KZ1000J of 1980 !

Its not really much of a horsepower advantage on the street, but for racing its pretty much a standard performance modification over there.

A lot of current kawasaki models have the KLEEN system fitted from stock, this is probably Kawasaki's version of the same thing that Honda use, or a variation on the theme.