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how to change a conrod

how to change a conrod

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Old 09-23-2009, 04:42 PM
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anybody have any vids on how to do it? Bout to change the rod on my ninja. Advice? never done it before.
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Old 09-23-2009, 04:45 PM
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Make sure your piston is TDC when removing the backplate. Take off/install your wrist pin clips inside a plastic/ziploc baggy.


Two lessons i learned the hard way.
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Old 09-23-2009, 04:47 PM
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Originally Posted by Cory Kerber View Post
Make sure your piston is TDC when removing the backplate. Take off/install your wrist pin clips inside a plastic/ziploc baggy.


Two lessons i learned the hard way.
i take it, that they fly off

what kind of tool do i need to get the clips off? I have some old pistons to practice on.
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Old 09-23-2009, 04:55 PM
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x-acto knife, small flathead screwdriver, pick, anything of that nature.
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Old 09-23-2009, 05:01 PM
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There's a guide on RB's website...

http://www.rbproducts.com/mainEn.php...ncept%20engine

You're actually not supposed to re-use the clips. Oh ya, make sure to wear some eye protection. I had one go flying into my eye the other day.
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Old 09-23-2009, 05:04 PM
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Yep I second the eye protection. Luckily I blinked!

Originally Posted by WeatherB View Post
There's a guide on RB's website...

http://www.rbproducts.com/mainEn.php...ncept%20engine

You're actually not supposed to re-use the clips. Oh ya, make sure to wear some eye protection. I had one go flying into my eye the other day.
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Old 09-23-2009, 05:13 PM
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Nah, I've been re-using the g-clips for so long without any problems. Get a pair of tweezers to make things easier. Cheers
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Old 09-23-2009, 05:18 PM
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i am like one of the fastest guys to work on a motor,
i blew a con rod in my grenade (i know i know shut up)
and i pulled it apart put a new con rod on it and got it running while the truggy 5min qual was going and i had it ready in time to run a worm up but it was short lived as i stalled because i left a 2mm chunk of alum in the bearing.
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Old 09-23-2009, 07:25 PM
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Take the Wrist pin clips off IN A zip loc bag....you'll thank us later.
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Old 09-23-2009, 07:46 PM
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Originally Posted by Integra View Post
Take the Wrist pin clips off IN A zip loc bag....you'll thank us later.
Now that is a good tip..
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Old 09-23-2009, 07:56 PM
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Originally Posted by dreaux View Post
anybody have any vids on how to do it? Bout to change the rod on my ninja. Advice? never done it before.
Take the cooling head off along with the "button" (combustion chamber)

As stated move the piston to near top dead center and remove the back plate.

Rotate the piston to BDC and remove the sleeve.

Take a sharpie and put a dot on the rod just above the crank pin as well as the exhaust side of the top of the piston. (You will appreciate this later)

Once again rotate the crank to TDC (or there abouts) and slide the rod off of the crank pin and remove the assembly out the top.

Also as stated put the assembly in a clear plastic baggy to remove the clips and to re install them.

Notate the rounded portion of the crank pin bushing as this will go against the crank fillet. (Check reference against the one that was removed) assemble the same way it came out again checking your dot on the piston for exhaust side reference.

Reassemble in reverse as stated above.




Any questions feel free to PM or email


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Old 09-23-2009, 09:46 PM
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Originally Posted by Integra View Post
Take the Wrist pin clips off IN A zip loc bag....you'll thank us later.
yes and also use the bag when installing those clips too
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