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Author Topic: Con Rod length  (Read 1070 times)

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Offline mlinder

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Con Rod length
« on: June 26, 2007, 10:12:59 AM »
Anyone know, offhand, the conrod lengths of the cb750 and cb350t?
Can't find em on google.
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Offline Sam Green Racing

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Re: Con Rod length
« Reply #1 on: June 26, 2007, 12:39:38 PM »
Don't know the actual lenths but the CB350t is 12.4mm shorter, hole center to hole center.

Sam.
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Offline mlinder

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Re: Con Rod length
« Reply #2 on: June 26, 2007, 01:21:08 PM »
Quote from: SamCR750 on June 26, 2007, 12:39:38 PM
Don't know the actual lenths but the CB350t is 12.4mm shorter, hole center to hole center.

Sam.

Well then, all I need to find out is how long the cb750 con ro dis and I'll be set :)
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Offline Sam Green Racing

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Re: Con Rod length
« Reply #3 on: June 26, 2007, 01:39:44 PM »
What are you trying to do ?

The 12.4mm is the diference in the stroke of the two motors.

The little end (piston pin) is the same in both but I'm not sure about the big end (crank journal) size.

Sam. ;)
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JMR Racing CB750A street ET drag bike

Offline mlinder

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Re: Con Rod length
« Reply #4 on: June 26, 2007, 01:43:41 PM »
Quote from: SamCR750 on June 26, 2007, 01:39:44 PM
What are you trying to do ?

The 12.4mm is the diference in the stroke of the two motors.

The little end (piston pin) is the same in both but I'm not sure about the big end (crank journal) size.

Sam. ;)

I'm looking at piston velocity.
Yes, the stroke is .5" different.

That doesn't mean the con rod is .5" different though...
That's what I was looking for, actual con rod length.
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Offline Sam Green Racing

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Re: Con Rod length
« Reply #5 on: June 26, 2007, 02:00:25 PM »
Not knowing the journal size of the 350, you will have to take the measurements from the top of the bigend eye and the bottom of the small end eye, this is were the 12.4 diference is.
Dissregard what I said about hole center to hole center.

Sam. ;)
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C95 sprint bike.
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CB95 race bike
CB92
RS 175. sprint/land speed bike
JMR Racing CB750A street ET drag bike

Offline mlinder

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Re: Con Rod length
« Reply #6 on: June 26, 2007, 02:08:21 PM »
Quote from: SamCR750 on June 26, 2007, 02:00:25 PM
Not knowing the journal size of the 350, you will have to take the measurements from the top of the bigend eye and the bottom of the small end eye, this is were the 12.4 diference is.
Dissregard what I said about hole center to hole center.

Sam. ;)

Yes, but I don't have either conrod handy with which to measure... I was hoping someone did :)
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Offline Sam Green Racing

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Re: Con Rod length
« Reply #7 on: June 26, 2007, 02:32:43 PM »
The CB350 rods are the same as the CL/SL350s and the CB360/CJ360T, any of these will do.

Sam. ;)
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C95 sprint bike.
CB95 hybrid race bike
CB95 race bike
CB92
RS 175. sprint/land speed bike
JMR Racing CB750A street ET drag bike

Offline Sam Green Racing

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Re: Con Rod length
« Reply #8 on: June 26, 2007, 02:33:52 PM »
Might be better asking on the other bikes forum.

Sam. ;)
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CB92
RS 175. sprint/land speed bike
JMR Racing CB750A street ET drag bike

Offline mlinder

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Re: Con Rod length
« Reply #9 on: June 26, 2007, 02:34:46 PM »
Aye, but I need the length of the cb750 conrod as well.
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Offline merc2dogs

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Re: Con Rod length
« Reply #10 on: June 26, 2007, 03:22:10 PM »


pm or email sparty?

going by the posts he's been making regarding crank head etc, he may be in a position to do a measurement for you.

ken.
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