Air Pollution Breather Block-off plates

hey jack i bought a complete j top end when iwas down in texas 2 years ago so it was the smog head i also have a early gpz head that is the canadian model and i halso have an 81 kz 1000 j complete bike.

I second that too. I have a set of ape plates. I was told that completely filling those holes makes a decent improvement in performance by some guy who was dragging his bike on the strip. Does anyone know about this? Has anyone else done it? I have my head off of my bike right now and if it would be a noticeable gain I would do it to mine as well however I have no idea about what would be the best way to do this.

dman3998 wrote:

nice plates, what else do you need to do besides block these ports to "DE" smogg these motors? I have a 79 1000 B3.

Thanks

Dman

That's it. Other than that the little can on the base of the block that one of the hoses goes in to could use a nice little angled hose pipe to keep stuff from going in there although I have run mine without I was told it was a really good idea to at least put an air filter over that hole.
You don't even need to get the block off plates, although they look much nicer. You put a hose between the two outlets on top so that they effectively block off the suction.

I'm doing it simply for cosmetic reasons. I can't imagine how it could impact performance.

I would be interested in any perfomance gains as well ... I guess I'll find out soon enough. I'm rebuilding my carbs right now so that should help things too .... plus I'm gonna adjust the valves and cam chain ... so with all of this maintenance any performance gains from the block off plates should prove to be a plus !!!

As for cosmetics ... I think they look great .... much nicer than the ugly rubber tubes !

l0g1c, check your PM's

Gotcha! :woohoo:

So I am interested in this block off...... What do you do with the small vacuume hose comming off the canister/filter? and do you have to rejet or anything?

So, I finally got around to doing some work on the KZ today, and I thought I'd post up a picture for posterity. The plates look f'ing sweet. Thanks again, Dale.