Topic: rod transplant cb750>>>>cb500-550

[Lykowsky]

Hi, was digging long and there is still no answer for my question, thinking about some custom rods for cb500>>550 and came across cyclexexchange yoshi super rods which fits cb750 i quess, guy in there promissed me to find out but i wanted to do my own research but as hell can't find any measurements table or similar showing these.

is here anybody who could put some usefull data on the table??

thanks
rob

[DavePhipps]

GSXR1000 rods wil fit, Differrent stroke and wristpin size though
http://forums.sohc4.net/index.php?topic=63228.0
What exactly are you wanting to do? Longer stroke, shorter, lighter?

[Lykowsky]

But there is one hint, increase stroke we can get by changing crank shaft, what i'm looking for to use Super rods yoshi if them are the same lenght as cb500-550 with 650 crank and 550 pistons matched with 550 barrels, optionally 60-61 pistons to keep rev ability the same but changing a bit characteristic of a torque by 650 crank

[sinister902]

GSXR1000 rods wil fit, Differrent stroke and wristpin size though
http://forums.sohc4.net/index.php?topic=63228.0
What exactly are you wanting to do? Longer stroke, shorter, lighter?

are they longer stroke or shorter stroke?

[Lykowsky]

What i hev found out the 2005-2008 carillo rods for gsxr1000 don't know if them are the same Howell uses in his, but written is there that lenght is 111.00 mm and somebody in howells topic wrote them CB500 are 5mm shorter but still there is missing info about cb750 rods,

What i want to do is to use 550 pistons with cb650 crank, 550 head or if will find any 60-61 pistons bore out 550 barrels and put 650 head on it with mild cam on it.

rob

[iomtt9]

Hi Rob, the company in the UK that make our Rods are called Robson Engineering. They will make any Rod for you,  they are not cheap but cheaper than Carrillos. We have used them in our 500/4s and they have performed well.
The Rods in the pics are ones that we had made for a project for a 498cc Honda/4 based on the old 400/4, but with a 15mm little end instead of the 13mm standard little end. So at least you know what they look like. If you want the address PM me and i will send it to you.
The rods are for sale if any one is building a 400/4 bored out to 498cc.
Col

[Sam Green Racing]

  very nice. 

[Howell]

GSXR1000 rods wil fit, Differrent stroke and wristpin size though
http://forums.sohc4.net/index.php?topic=63228.0
What exactly are you wanting to do? Longer stroke, shorter, lighter?

No different stroke with the GSX-R rods !!!!! , crankshaft is still stock.
But the rods are longer and the piston is shorter above the pin.

[Lykowsky]

GSXR1000 rods wil fit, Differrent stroke and wristpin size though
http://forums.sohc4.net/index.php?topic=63228.0
What exactly are you wanting to do? Longer stroke, shorter, lighter?

No different stroke with the GSX-R rods !!!!! , crankshaft is still stock.
But the rods are longer and the piston is shorter above the pin.

thats what i wanted to know, them guys on xcycleexchange site have some yoshi aluminium super rods are they any worthy?? but i haven't a clue if them are to fit cb750 if yes, that's why i asked about cb750 con rod lenght

[Lykowsky]

At the moment i'm considering to set it in a street bike, but don't mind the engine would be strong. Howell have you got that rough idle in yours cb500??

rob

[mlinder]

Some people are not understanding something, so I will put this out there:

The length of con rods does not affect the length of your stroke. Stroke is the same, regardless of rod length.

Stroke is changed by crank. Specifically, by how far the crankpins are away from the rotational center of the crank.

I know most of you know this already, but some people apparently do not.

[Howell]

Some people are not understanding something, so I will put this out there:

The length of con rods does not affect the length of your stroke. Stroke is the same, regardless of rod length.

Stroke is changed by crank. Specifically, by how far the crankpins are away from the rotational center of the crank.

I know most of you know this already, but some people apparently do not.

I said that before: No other stroke with the GSX-R rods !

[mlinder]

Some people are not understanding something, so I will put this out there:

The length of con rods does not affect the length of your stroke. Stroke is the same, regardless of rod length.

Stroke is changed by crank. Specifically, by how far the crankpins are away from the rotational center of the crank.

I know most of you know this already, but some people apparently do not.

I said that before: No other stroke with the GSX-R rods !

Right... but no other stroke with any other rods, not just the GSX-R.

Some people not getting that.

[Lykowsky]

so is there anyone having info about CB750 rods lenght??

that was straight from the begining that no stroke change with the rods
rob

[Lykowsky]

at the moment waiting for some info from xcycle exchange shop about their yoshi superrods lenght

[mec]

so is there anyone having info about CB750 rods lenght??
rob

my measurements:

cb750 sohc
D=39mm
d=15mm
Br 23mm
L=116mm mitte/mitte

cb900 bol d´or
D=39mm
d=15mm
Br 23mm
L=117,1mm mitte/mitte

cb500 sohc
D=38mm
d=15mm
Br mm
L=106,5mm mitte/mitte

mec

[bear]

Some people are not understanding something, so I will put this out there:

The length of con rods does not affect the length of your stroke. Stroke is the same, regardless of rod length.

Stroke is changed by crank. Specifically, by how far the crankpins are away from the rotational center of the crank.

I know most of you know this already, but some people apparently do not.

I said that before: No other stroke with the GSX-R rods !

Right... but no other stroke with any other rods, not just the GSX-R.

Some people not getting that.

Your a grumpy bugger aren't ya

Brian

[mlinder]

Not really.

[bear]

Hi Rob, the company in the UK that make our Rods are called Robson Engineering. They will make any Rod for you,  they are not cheap but cheaper than Carrillo's. We have used them in our 500/4s and they have performed well.
Col

http://www.robson-engineering.co.uk/about_us/
Looks like quality gear.
I've submitted a Quote request.
Shorter Rods may allowe me to remove the spacer plate under my barrels.
Look forward to catching up with you at PI in January.

Cheers,
Brian