I have a CV carb that I want to fit to replace the original Keihnin. What do I do where the CV vents back into the motor as the Kehnin vents via a tube into the crancase? Any advice appreciated. Is this a job I should be attempting? Cheers Burnzi

EDIT just found my answer Thanx again Kiwidave

what year bike are you fitting it up to??

Hi kickinon thanx for ur reply I have an 87 FXSTC. Standard with the original kehnin carb. This motor doesnt have the "Breathers" in the head, mine bolts in with I think 1/4 inch bolts, the CV carb I have came off a 95 fatboy so it has the hollow bolts that send the gases back in to the motor to be burnt?? (Probably a wrong description) Jus wonderin what happens here with the tubes out the back of the air cleaner do i disconnect em leave em or what?? Any education welcome Burnzi

i fitted a cv to my 87 flstc 7 years back l dont have the bike any more,
you can still use the standard aircleaner , you dont have to block off the holes in the backing plate,but thats up to you , it wont matter in the running of the bike
, l used a differant aircleaner & backing plate l cant remember what now, what l do remember is l left the hole on top of the carb open (small brass tube) & it ran poorly,
but ran great when l blocked it off, l run cv's on all my old bikes they are easy to tune ,cheap, & run great, so l get a bit confussed when l have to think back to a particular bike,
but it will run without the polution tubes hooked up, Have you got the imfo on drilling out the soft cover plate? on the bottom of the carb.? before you install it? so you can adjust the mixture if needed,

Yep got the info about drillin out the cover jus dont know if my knowledge is up to it. Im gunna fit the 95 Aircleaner and backing plate, so hopefully no dramas, If its not runnin right I will take it to the guy that services it. Thanx again kickin appreciate ur advice. Cheers Burnzi

Sorry mate too many red wines I jus replied on Shazzas, I dont hog her facebook wots the go with her hoggin the forum. U probably figured that out anyway Thanx Burnzi

well at least it made me sound like I knew what I was talkin about LOL, thanks Burnzi for the cop out, you could have made me sound good I'm a repco chick after all, know a bit a bout cars, not to much about bikes LOL just a hungarona LOL

It will have no effect whatsoever.
Just fit the cover with the usual 1/4 bolts, using a suitable washer to ensure retention.
Typically there would be rubber blanks to cover the 1/4 bolts, and to ensure that the cover does not a gap at that point, and seals effectively.
You could just use the breather tubes, and leave them connected to the a/c element, if you wanted. At least that way you would avoid the 1/2 bolt look.
The breather ports in the heads are exit only, utilising a one way "umbrella" valve.

Thanx again Dyna appreciate ur input. Livin along way from a mechanic or shop has its drawbacks, thank god for the knowledge u guys have. Cheers Burnzi