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BIKELAND > FORUMS > ZX12R ZONE.com > Thread: zx12r rod bolts... NEW TOPIC NEW POLL POST REPLY
Y2KZX12R


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posted February 09, 2006 04:47 PM        
What the hell is it?

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osti33


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posted February 09, 2006 04:49 PM        
Hell if I know...
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Y2KZX12R


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posted February 09, 2006 04:51 PM        
Fish, are we gonna get some virous or somthing?
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your car is slow


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posted February 09, 2006 05:00 PM        
hes probably using a different regional version of windows (or whatever he is posting on)...i dunno...its just your browsers interpretation of a character.
____________
Do not taunt happy fun ball!

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Big Al


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posted February 09, 2006 05:21 PM        
I don't know I have dell a with win 98
never had any problem posting on anything. Don't see anything funny on my moniter

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speedfab


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posted February 09, 2006 06:36 PM        
It's this message board's interpretation of a character it does not recognize because he typed his post using another program and cut and pasted the text into a text box on Bikeland. Thus his apostrophe ends up looking like a New York taxi driver's name.

Now how bout them rod bolts? I tighten them til they're loose again, then back off a smidge.

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osti33


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posted February 09, 2006 06:45 PM        Edited By: osti33 on 9 Feb 2006 18:46
quote:
Now how bout them rod bolts? I tighten them til they're loose again, then back off a smidge.


LOL! Me too. Tighten up until they crack then back them off a half a turn.

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big al


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posted February 10, 2006 10:09 AM        
Speedfabs right I was having trouble with my internet, kept losing my post so I used word and pasted.
I'm bad!!! I'll never do it again!!! Gave myself a 15 min timeout!!!!!!!!!

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Y2KZX12R


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posted March 07, 2006 05:39 PM        
Ok, well, the rod failure mystry maybe solved.
All 4 of my rods need resizing.
They are all distorted about the same .0012" total. .0006 each way. Think of measuring a shallow x across the cap parting line with a ID bore guage.

This is NFG. Its sure to pinch for a while with new bearings. In this case the engine would need 1500 miles before you could beat on the engine. (gee remember the extended breakin)
So this could explain any spun rod bearings people may have had. But NOT a cleanly snapped rod on an unheated/unspun rod bearing.

Funny thing is... the oil clearances were perfect in all directions on the bearings with 18,000 miles on them. So the bearings conformed to the rod journal nicely. Either the rods were out like this when they were torqued the first time at the factory, or the caps walked during the last 18,000 (hard) street miles.

Anyway, CHECK THOSE RODS ON REBUILDS !!! And have them resized if theres any doubt.

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gunner


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posted March 07, 2006 06:36 PM        
Question................Jim when you do the resize do you use the new bolts torqued to spec or the old bolts? If the new ones are used wouldn't this be like useing the bolts twice?
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Y2KZX12R


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posted March 07, 2006 07:01 PM        Edited By: Y2KZX12R on 12 Mar 2006 05:10
Yea it is, kinda. You dont go 100% of the spec to resize thou. So when you torque to yield all the way its the first time the bolts will have seen the full stretch.
Dimple drill the bolts on both ends to give repeatability when checking the stretch with a rod bolt stretch guage. Then cut the caps and rods, and press in the new bolts. Oil the threads and seats and go 1-7/8 flats. This stretches the bolts to about .011" Then resize to 1.5748-1.5751 for standard bearings. We chose 1.575" and thats the same as they all were measuring top to bottom (known as "the oil gap") before machining, or 1.5752-1.5754 for the O marked oversized rods.

Now they are within .0001"

See the thread on the 1375 build-up.

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BIKELAND > FORUMS > ZX12R ZONE.com > Thread: zx12r rod bolts... NEW TOPIC NEW POLL POST REPLY

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