Kawa-Bunga! A Project Sled for 27

[hermie]

Looks like that set-up would really cut back on engine vibration through the chassis. Very interesting set up. Personally I always liked the Kawasaki invaders. Ran good for back in there day. I remember the next door neighbor to my grandparents had a couple of Invaders while I was on a Johnson rotary and a scorpion stinger 3. I was trying to talk my grandparents into getting one but that didn't go anywhere.

 

[skiroule]

Looks like that set-up would really cut back on engine vibration through the chassis. Very interesting set up. Personally I always liked the Kawasaki invaders. Ran good for back in there day. I remember the next door neighbor to my grandparents had a couple of Invaders while I was on a Johnson rotary and a scorpion stinger 3. I was trying to talk my grandparents into getting one but that didn't go anywhere.

I think you might make a good point here. This sled has a smooth feel to it and some of that may be due to improved vibration dampening.

I haven’t run into anyone that owned an Invader or knew someone that had one that doesn’t say these were very fast for the time-period. The Intruders are not in the invader’s league but they’re no slouch either. When you get on the throttle and that motor starts pulling from all three carb jets, it’s still fun (that’s right, the carbs on the Intruders used a third jet, in addition to the pilot and main).

Rear suspension is removed and even though all the chassis bolts/nuts I've encountered are SAE, the suspension mount bolts are metric. Strange.

 

[euphoric1]

3rd jet?

 

[skiroule]

3rd jet?

Yes, I guess Mikuni called them “Powerjet” carbs but Kawasaki used the term “Econojet”. As I understand it, the goal was to improve mileage while maintaining performance.

The main and pilot jets operate as they normally do on Mikuni’s. The third jet (aka econojet) is a somewhat different type jet and is located in the bowl. This jet feeds fuel directly into the carb venturi via a line from the bowl. The rate of fuel delivered through this jet is determined by the air flow through the carb.

According to Kawasaki, this jet only comes into play over ½ throttle and is most effective at wide open throttle. I’m not sure where the economy aspect comes in but maybe it’s below ½ throttle because it allows for a smaller main jet, which usually comes into play earlier at about ¼ throttle. The smaller main can be seen in the specs, which are as follows:

LH cylinder: pilot – 25, econojet – 130, main – 140
RH cylinder: pilot – 25, econojet – 120, main – 140

This is a concept that I had never heard of before I bought this sled.

On a somewhat humorous note, Kawasaki doesn’t call the choke a choke. They call it a “Enrichener Circuit.” Very impressive sounding.

 

[heckler56]

On a somewhat humorous note, Kawasaki doesn’t call the choke a choke. They call it a “Enrichener Circuit.” Very impressive sounding.

In today’s world they might have called it “Viagra Circuit”

 

[euphoric1]

Technically.... a plunger type choke set up is more of an enrichener more so than a choke because you are not "choking off" the air supply to privide a fuel charge required for starting, where as an enrichener is only providing an "enriched" fuel charge for starting, so in retrospect...Kawasaki had it right LOL! "3rd" jet sounds more like and attempt to help with midrange slump round slides were notorious for, better fuel economy as result of not having to lay into throttle as hard to get past it in a 2 jet system?