Mikuni CV Yamaha BS34 Carbs on a SF?

Laverda SF

Laverda SF

Hero member
Is it feasible and use air filters Vs the open mouth spitting dirt breathing Dellorto VHB30A's on a 71/72SF ?

From my experience there is no way to use an air filter or velocity cones with Dellorto VHB30A's with 2 into 1 pipes with 32 Main jets.

Mind you she's preforms great but rather dirty and spits back thru the carbs at idle with a fuel stand off and has no dust protection with the VHB30A's.

Been running her like that for some 40 years with frequent oil changes - BUT could them Mikuni CV Yamaha BS 34's solve this fuel standoff and dirt ingestion?
 
If it ain't broke .......
Besides, if it's taken you 40 years to see a possible problem from dirt ingestion, by the time you'd sorted it, you'll be too dead to ride it.
 
Chrisk: You're probably right but I'll die wondering ;o)

Besides I do have a set of them BS34's on hand and always thought they would work with cones and filters.

Is it worth the effort at this late state - That is providing members of this forum think it will work ;o)
 
Are they off a 2 stroke or 4 stroke?
Jetting, needles likely a mile out.
Then you have inlet adaptors to fabricate, cables to make and so on.
 
Grant: The carbs are off this bike:
4722397305_3edfd424e9_o.jpg


Can't remember if it was a 450 or 550 but does look somewhat like an SF - LOL

Granted they will require cable, mounting fabrication and jetting and they are somewhat of a SU Vacuum CV Carb.

As a matter of fact it's electronic ignition with minor fab will work on a SF and the bars fit perfect but do a need little hack sawing off the ends.

I do have the throttle and cables from it.

Should have kept the rims but the chain was on the wrong side - Didn't think until later all I had to do was turn the back wheel around ;o)
 
Don't do it. It's seriously not worth the hassle.
Those carbs have no aftermarket support inso far as needles, springs, needle jets are model specific to those carbs - and alternatives were never available.
 
Thanks Greg - Never considered that - For sure a NO GO for me now and don't have to die wondering if it would have ;o)

Don't any of you tell me that's not an interesting idea.

Reggie: Yes an SF can do wheelies going down hill - Evel Knievel proved it - LOL.

So, anyone interested a nice clean set of Mikuni CV Yamaha BS34 Carbs for their SF ?

Love this forum considering all the shit I get into ;o)
 
Didn't ride her last year as I'm into Jeeping. A current PIC will look the same except I've new BT 45's skins mounted - Considering the cost of insurance, don't know if I'm going to ride her this year either as I'm getting deeper into muck with the Jeep ;o)

I've been riding for some 45 years - It don't thrill me as much as it use to, been over them roads time and time again becomes boring, and not getting any younger to bully her around the way I want to either.

Wish I had never lost my old 66 Leyland Land Rover.

For Reggie: If can't pull of a wheely with an SF in 1st or 2nd - Then you don't know how to tune a SF. Not saying you need a strong tale wind like I wheel ;o)
 
Laverda SF said:
Didn't ride her last year as I'm into Jeeping. A current PIC will look the same except I've new BT 45's skins mounted - Considering the cost of insurance, don't know if I'm going to ride her this year either as I'm getting deeper into muck with the Jeep ;o)

I've been riding for some 45 years - It don't thrill me as much as it use to, been over them roads time and time again becomes boring, and not getting any younger to bully her around the way I want to either.

Wish I had never lost my old 66 Leyland Land Rover.

For Reggie: If can't pull of a wheely with an SF in 1st or 2nd - Then you don't know how to tune a SF. Not saying you need a strong tall tale wind like I wheel ;o)
Click to expand...

Fixed  :D
 
2 years now and loving that Jeep - Wish she was a Land Rover or heaven forbid a Toyota Land Cruiser.

As far as "It's Jeep a Thing" wash your mouth - That Jeep gets me back to my roots at about 3000 to 5000 ft above sea level in the bush with clean water, fish exists and logging has a tough time getting there and diamond drillers are just about to blow mountains apart for minerals - What's left of it today.

Don't need that Asphalt Warrior at my age. Been there did that.

We're off topic but us old Breganze Rider's know when it's time to dismount.

----------------------

It's my Birthday to day Jun16th and thought I was 69 but turning 68  - Another year before the BIG ONE !
 
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