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Author Topic: Dr. Jekyll and Mr. Hyde ( a pair of KZ400s)  (Read 43799 times)

Offline 7aliveatlast7

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Re: Dr. Jekyll and Mr. Hyde ( a pair of KZ400s)
« Reply #40 on: Jan 18, 2013, 11:15:24 »
^^^ wow...i am waaaay below your level, haha.  interested to see where this goes!

Offline beezerboy

  • Posts: 3
Re: Dr. Jekyll and Mr. Hyde ( a pair of KZ400s)
« Reply #41 on: Jan 19, 2013, 04:45:59 »
I built up a 440 a few years ago & hung around on a 400/440 forum for a while. there was a couple guys building hot rod 440s & they were leaving the balancer off all together.... saves weight & makes RPM changes quicker so they say. just a thought if you want to get really silly.

Offline Nebr_Rex

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Re: Dr. Jekyll and Mr. Hyde ( a pair of KZ400s)
« Reply #42 on: Jan 19, 2013, 10:15:01 »
^^^ wow...i am waaaay below your level, haha.  interested to see where this goes!

I am neither above or below anybody else,but sometimes I take a ride on the short bus.

Offline Nebr_Rex

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Re: Dr. Jekyll and Mr. Hyde ( a pair of KZ400s)
« Reply #43 on: Jan 19, 2013, 10:32:14 »
I built up a 440 a few years ago & hung around on a 400/440 forum for a while. there was a couple guys building hot rod 440s & they were leaving the balancer off all together.... saves weight & makes RPM changes quicker so they say. just a thought if you want to get really silly.

I'm going to leave the balancers in.
I believe the balancers are there to counter the force both pistons rising and falling together.
The rotating assembly should be taken care of by the crank counter weights.
Any gain from removing them will come from freeing up the power it takes to spin the balancers.

Offline beezerboy

  • Posts: 3
Re: Dr. Jekyll and Mr. Hyde ( a pair of KZ400s)
« Reply #44 on: Jan 25, 2013, 05:18:38 »
my understanding is that the chain driven balancers cancel the fore & aft moments that the crankshaft counterweights generate at the 90/270 degree positions. the crank weights on the cheeks are supposed to cancel the pistons' moment

I'd leave them in too if I was going to drive it around very much

Offline Nebr_Rex

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Re: Dr. Jekyll and Mr. Hyde ( a pair of KZ400s)
« Reply #45 on: Jan 26, 2013, 22:35:16 »
What they say is ...
 
  At 0 & 180 the counter balancers and the counter weights on the crank are to split the balance weight to counter the rod and piston,50% & 50%.

  At 90 & 270 they are opposed each other,thus canceling each other out, the weights and balancers.

  If you have ever seen an old John Deere A, B, G, 50,60,70 etc... model tractor idle in neutral without the brake engaged.
 You'll see it will rock forward and back in sync with those 2 big pistons on that big vertical twin.
 That force is what I'm most concerned with.

Offline Nebr_Rex

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Re: Dr. Jekyll and Mr. Hyde ( a pair of KZ400s)
« Reply #46 on: Feb 17, 2013, 22:57:35 »
Progress has been a little slow,electronics are not my strong suite.
But I've come up with something not so complicated that just might work.
The circuit was designed for replacing the ignitor on a Kawasaki KZ series.
It's a lot simpler than the other circuits I tried copying.
Besides the GM style ignition module, there are 2 diodes and 1 resistor.
I'll be reinstalling all the injection plumbing next time I'm home.
There will be pics to follow later.

Offline Nebr_Rex

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Re: Dr. Jekyll and Mr. Hyde ( a pair of KZ400s)
« Reply #47 on: Mar 10, 2013, 11:38:26 »
Made some progress lately.
I used 2 GM sign. modules and received good results.
Not what I'm looking for,but closer.
Tried 2 stock Kawasaki electronic ign. IC ignitor boxes wired up the same also and it didn't work.
Maximum dwell/pulse width was 60% as shown on my meter.
At the typical 43.5 psi and 14 lb. injectors would be just under the target h.p..
Higher fuel line pressure will cover the difference.
Idle pulse width is to high.
I'm leaning to use a combination of a GM module and custom transistor circuit or use the 2 modules and an additional circuit to eliminate one 1 module circuit during idle/low rpm.
The timing will need to be rechecked before that step is taken.
Also I have a Radio Shack pulse width modulator kit to assemble to control the fuel pump.
Which in turn will be getting it's control signal from a Bosch wide band o2 sensor.


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Offline Nebr_Rex

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Re: Dr. Jekyll and Mr. Hyde ( a pair of KZ400s)
« Reply #48 on: Mar 23, 2013, 19:47:29 »
Been side tracked lately.
Doing a tune up and some general maintenance on a 440.
Thought it would be a good way to pick up a couple extra bucks.
Might be helping someone earn a Darwin Award instead.









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Offline Nebr_Rex

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Re: Dr. Jekyll and Mr. Hyde ( a pair of KZ400s)
« Reply #49 on: Mar 23, 2013, 19:56:20 »
Did pick up a parts bike.
KZ440 LTD belt drive.
Everything is there even the air box.
Brakes work,nothing bent.
Tires look good,only flat on one side,might get out a bead bag and hammer and straighten that out.
Would make a really good bike for someone but,no title or keys.



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