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Author Topic: Dr. Jekyll and Mr. Hyde ( a pair of KZ400s)  (Read 49765 times)

Offline Nebr_Rex

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Re: Dr. Jekyll and Mr. Hyde ( a pair of KZ400s)
« Reply #160 on: Dec 13, 2015, 09:32:48 »
will removing that much material cause the cam chain to have extra slack? will the tensioner be able to take up that much?

Just had another wild idea.
If this does not work I might try machining a pair of custom rods that are longer than original.


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Offline DohcBikes

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Re: Dr. Jekyll and Mr. Hyde ( a pair of KZ400s)
« Reply #161 on: Dec 13, 2015, 11:05:17 »
How does that even remotely relate to this issue?  Serious question.
burning bridges sometimes light the most productive paths

Offline teazer

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Re: Dr. Jekyll and Mr. Hyde ( a pair of KZ400s)
« Reply #162 on: Dec 13, 2015, 11:38:12 »
I suspect that he means going back to stock height barrels and making longer rods to allow for the lower deck height on the Honda pistons.   

The cam chain will probably have enough adjustment in it but it will change cam timing and that will probably need to be adjusted.  Another issue is that the liners were not machined to match the block and may be too long and too large to fit in the crankcases.

And have you worked out the compression ratio?  With that flat top piston it might be a touch low.
« Last Edit: Dec 13, 2015, 11:41:34 by teazer »

Offline DohcBikes

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Re: Dr. Jekyll and Mr. Hyde ( a pair of KZ400s)
« Reply #163 on: Dec 13, 2015, 12:23:45 »
Thank you. My head hurts a little less now.
burning bridges sometimes light the most productive paths

Offline Nebr_Rex

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Re: Dr. Jekyll and Mr. Hyde ( a pair of KZ400s)
« Reply #164 on: Dec 13, 2015, 21:09:53 »
I suspect that he means going back to stock height barrels and making longer rods to allow for the lower deck height on the Honda pistons.   

The cam chain will probably have enough adjustment in it but it will change cam timing and that will probably need to be adjusted.  Another issue is that the liners were not machined to match the block and may be too long and too large to fit in the crankcases.

And have you worked out the compression ratio?  With that flat top piston it might be a touch low.

Bingo!
Compression with a stock head [ not milled ], will be around 7.1/1 .
With a head milled .070 and no base gasket, just some 1194 for a sealant.
The compression ratio jumps up to around 8.5/1 . Which is what I'm
shooting for. As for the barrels I am thinking about an aluminum spacer
to take up the difference.


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Offline Nebr_Rex

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Re: Dr. Jekyll and Mr. Hyde ( a pair of KZ400s)
« Reply #165 on: Dec 13, 2015, 21:13:31 »
Thank you. My head hurts a little less now.

You might want to think about staying away from those company Christmas parties.

Offline DohcBikes

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Re: Dr. Jekyll and Mr. Hyde ( a pair of KZ400s)
« Reply #166 on: Dec 13, 2015, 21:39:17 »
Buy a klx450 motor and be done with this epic
burning bridges sometimes light the most productive paths

Offline Nebr_Rex

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Re: Dr. Jekyll and Mr. Hyde ( a pair of KZ400s)
« Reply #167 on: Dec 13, 2015, 22:05:18 »
Buy a klx450 motor and be done with this epic

No room for growth, they are pretty much maxed out from the factory.
Also I'm no fan of titanium valves and replacing them with stainless steel
and a valve spring change. Besides anyone can buy horsepower. It's more
fun making it. There is a saying that goes " if it hurts don't do it ". And
something about repeating an action and expecting a different result
questions one sanity. You might want to avoid this thread.


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Offline DohcBikes

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Re: Dr. Jekyll and Mr. Hyde ( a pair of KZ400s)
« Reply #168 on: Dec 13, 2015, 22:34:41 »
But then again, I might not.

One can never tell.
burning bridges sometimes light the most productive paths

Offline Nebr_Rex

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Re: Dr. Jekyll and Mr. Hyde ( a pair of KZ400s)
« Reply #169 on: Dec 14, 2015, 09:06:52 »
Well," bless your heart".