Topic: Conrod's original or not?

[napoleonb]

I hope you folks can help me sort out which conrod is "original".
There are just so many types of them which are all supposed to be original that I am a little confused.
1


2

3


4



Thanks in advance

[kos]

The ones that have "CR750)" on them are not Honda parts. The ones from David Silver look to be OEM.  No rods from Honda have bushed small ends.

The bottom pic shows Carrillo's

KOS

[Bill/BentON Racing]

Pics in 1,not sure.Rods in pic 2 look like K model.Pic 3,part # ending in 970 denoted CR parts.Last pic Carillo's on crank,stock rod next to Carillo? Good Luck,Bill

[Big Jay]

Not Carrillos on the crank.

[Bill/BentON Racing]

Jay,thanks,I haven't had the privilege of owning or installing Carillo's....yet! Any idea what rods are on the crank? And a huge thanks for what you are doing for all the old SOHC bikes! ,Bill

[CR750]

Aan het shoppen Nap ?  ( Inside joke in Dutch )

@Kos: so what you are saying is that the genuine Kit items (all runs) never had cr750 casted in to them ? Because these are coming up frequently, so someone is doing/did these to cash in on the CR750 craze ( either back then or now ?!)

Sander

[kos]

Honda Made CR750 kit rods had nothing cast on them and no Honda rod has ever had bushing in small end. (Wrist pin)

[kos]

Not Carrillos on the crank.

Correct, rods on crank are not Carrillos.

KOS

[Sam Green Racing]

The 2 rods to the right in the bottom 2 pictures below the crank look like Carrillos.

Sam.

[Ricky_Racer]

There were several hundred (thousand?) sets of the rods with "CR750" cast into them made "back in the day."  Although I've never used a set, in the distant past they were described to me by knowledgable builders as "junk."  I remember seeing a bunch of them sold for less than $50/set "way back when."  Remember, YMMV.  RR

[kos]

Rocky Racer is correct...if you look at those "CR" rods they even look bad!


KOS

[napoleonb]

Thanks for all the response guys I am glad there is so much knowledge around here.
The next question for me is what the specifics of a real CR conrod are?
I for one can not tell the difference between a standard conrod and those of David Silver (but because it is David I am sure he's wright)

[MRieck]

There were several hundred (thousand?) sets of the rods with "CR750" cast into them made "back in the day."  Although I've never used a set, in the distant past they were described to me by knowledgable builders as "junk."  I remember seeing a bunch of them sold for less than $50/set "way back when."  Remember, YMMV.  RR

Those CR rods are complete junk. Ricky is 100% correct.

[Jerry Rxman Griffin aka MuthaF'er]

Thanks for all the response guys I am glad there is so much knowledge around here.
The next question for me is what the specifics of a real CR conrod are?
I for one can not tell the difference between a standard conrod and those of David Silver (but because it is David I am sure he's wright)

Are you looking for new rods or just looking for information?

David Silver Spares sells mostly new and NOS parts. Are they saying they have aftermarket or other-than-stock Honda rods? I'd believe what they have to be original stock rods.

Those "CR750" rods are very heavy too. About 10% heavier than stock. Their weights vary too much between rods to balance very well. 375-380gm + or - for both figures. My Carrillos are 318gm. Stocks are ~357gm. RC took stock rods, peened them and bushed the small ends with their mid-level rod getting larger bolts. Then there are RC Golden rods, Yosh Super rods, Cyclex has rods available, APE had Crower make rods for us but they are heavy like those CR750, there are MTC aluminum rods floating around out there. Oh yeah let's not forget Falicon, probably the 2nd best option currently available. What have I left out guys?








etc

[napoleonb]

Thanks Jerry, I am currently just looking for information. I assumed the original CR rods to be much lighter and very well out balanced so therefor a good buy if they came available.
But as I now understand they are not a valuable addition to the engine, just something for your mind or in a cabinet to look at...

[Jerry Rxman Griffin aka MuthaF'er]

Don't confuse those "CR750" rods with real CR 750 rods. They are 2 different animals. I'm not so sure than the original CR750 rods weren't stock rods that were shot peened. Mike MARK McGrew (M3) (KOS) would be the best source for that info. My stock rods have handled my Yoshimura 812 with Yoshimura Daytona cam quite well for 25,000+ miles. No head porting though.    

[kos]

Thanks for all the response guys I am glad there is so much knowledge around here.
The next question for me is what the specifics of a real CR conrod are?
I for one can not tell the difference between a standard conrod and those of David Silver (but because it is David I am sure he's wright)

Are you looking for new rods or just looking for information?

David Silver Spares sells mostly new and NOS parts. Are they saying they have aftermarket or other-than-stock Honda rods? I'd believe what they have to be original stock rods.

Jerry....The David Sliver rods in picture have "970" final part number...so they are real kit rods, unless you think Mr Silver is "miss-labeling" them?


KOS

Those "CR750" rods are very heavy too. About 10% heavier than stock. Their weights vary too much between rods to balance very well. 375-380gm + or - for both figures. My Carrillos are 318gm. Stocks are ~357gm. RC took stock rods, peened them and bushed the small ends with their mid-level rod getting larger bolts. Then there are RC Golden rods, Yosh Super rods, Cyclex has rods available, APE had Crower make rods for us but they are heavy like those CR750, there are MTC aluminum rods floating around out there. Oh yeah let's not forget Falicon, probably the 2nd best option currently available. What have I left out guys?








etc

[Jerry Rxman Griffin aka MuthaF'er]

KOS,

Good info, that's why I deferred to you. Taking a second look at the picture and opening it up I see the -970 and it also looks to be a different color? Different alloy perhaps? Would peening do that?

[Phil]

I live close to David Silver and could ask him for a look, if it helps?  He only had 3, incidentally!!

[Bill/BentON Racing]

Original and not what we want to see!! Anyone guess what its out of and what happened?

It came out @ WFO after 10 minutes of severe abuse!

It was glowing red and went about 10-12 feet!

Sam,the Carillo's will NEVER look like this! ,Bill

[Sam Green Racing]

I don't know what it's out of but it won't be going back in anything other than the bin.

Sam.

[Bill/BentON Racing]

OK,Sam's right,came out of a 4.0L. Ford.Not it's fault,part of the Clunkers For Cash program. Instead of draining the oil and adding sodium silicate,they just drained the oil! Bill

[Sam Green Racing]

Reminder to Bill, don't make same mistake with you know what.

Sam.

[Bill/BentON Racing]

  ,if it happens........hope you on board!Ha Ha,Bill