CR carbs

[bladeboy]

Hi, I'm thinking of fitting a set of 29mm CR carbs to my 78 cb750, 
Can anyone advise me if it's a good idea or not... Cheers

[Bryanj]

Not for normal road riding no

[Greebo]

Hi, I'm thinking of fitting a set of 29mm CR carbs to my 78 cb750, 
Can anyone advise me if it's a good idea or not... Cheers

I look into this a couple of years ago before building my CB 750 K6 café racer, so I agree with Bryanj stick with the stock carbs especially if its a standard engine [not tuned]
CR carbs can even cause unreliability for race tuned engines, they are also difficult to ajust in situe.
I finished up putting K&N filters on mine [stock motor] along with re-jetting which took a bit of sorting, but it goes like stink now....

[bladeboy]

So stick with standard carbs but re jet them .... I was going to put a yoshi cam in her bad idea or not??? Such a grey area thanks for yr input guys.

[Bryanj]

Yoshi cam on its own don't work, you need to make ignition timing mods and jetting mods plus gearing mods as the power is all at the top of the rev range

[Greebo]

So stick with standard carbs but re jet them .... I was going to put a yoshi cam in her bad idea or not??? Such a grey area thanks for yr input guys.

Don't play around trying to tune the engine you will have a headache with reliability, theses engines dont like tuning, unless its done by a sohc professional specialist & then it would only be good for the track. 

I put K7 carbs on my K6, only because the originals were knackered & I'd got a good set of K7 carbs, fitted 138 main jets, needle is on last notch [bottom]  ignition timing advance 10 degrees, more power & it runs like a dream.

I have a full spare set of K&N filters as new for sale [for the K6 carbs]

[onethumb]

Hi, I'm thinking of fitting a set of 29mm CR carbs to my 78 cb750, 
Can anyone advise me if it's a good idea or not... Cheers

I look into this a couple of years ago before building my CB 750 K6 café racer, so I agree with Bryanj stick with the stock carbs especially if its a standard engine [not tuned]
CR carbs can even cause unreliability for race tuned engines, they are also difficult to ajust in situe.
I finished up putting K&N filters on mine [stock motor] along with re-jetting which took a bit of sorting, but it goes like stink now....



Sorry to hijack but I've got the PhD carbs on my 750 f2 and will be putting cone filters on what jet size should I go to or should I just clean every thing up?
Also is there a rebuild link for the PDFs carbs anywhere?
Thanks again, steve.

[onethumb]

Sorry admin but idiot know how to split the quote thing up. My bad. 




Sorry to hijack but I've got the PhD carbs on my 750 f2 and will be putting cone filters on what jet size should I go to or should I just clean every thing up?
Also is there a rebuild link for the PDFs carbs anywhere?
Thanks again, steve.

[yozzer74]

There's rebuild kits on eBay for them and David silver's do them

[SteveD CB500K0]

Sorry admin but idiot know how to split the quote thing up. My bad. 




Sorry to hijack but I've got the PhD carbs on my 750 f2 and will be putting cone filters on what jet size should I go to or should I just clean every thing up?
Also is there a rebuild link for the PDFs carbs anywhere?
Thanks again, steve.

PhD Carbs?  You need a university education to understand them!

 

[SteveD CB500K0]

Sorry admin but idiot know how to split the quote thing up. My bad. 

It's not particularly intuitive to the modern iOS generation...  I was brought up on Fortran, Algol and HTML so can edit the code in the "quote"

The trick is to remove any unwanted text from within the [quote and /quote] tags - I can't use the full syntax here or it would treat them as quotes!

  You can also edit quotes so that you can quote what the originator never said 

eg

Steve, I think you are a biking god!

[AshimotoK0]

 

PHd  carbs ' They won't let you down, won't let you down again'   

[onethumb]

Bloody hell, I've got to start proof reading my posts from now on.
 

Steve I think you are a biking God.

[SteveD CB500K0]

Clearly my Algol/html stuff is meaningless today as this doesn't work at all using Tapatalk on my iPhone.
Read it on a PC.



Sent from my iPhone using Tapatalk

[UK Pete]

[/quote]

PhD Carbs?  You need a university education to understand them!

 
[/quote]