dual carb swap cyclone

heiner921 · Post by **heiner921** » Sat Dec 19, 2015 11:44 am

looking to do a dual carb swap on a 1976 440 cyclone serial number -70000. i have a parts sled that is a 1976 340 liquifire serial is 70000- Can i use the ones off the 340 liquifire? i know they arent the same and id have to do some jetting. i know the stock 440 cyclone carb is a vm34... what are the 340 liquifire carbs? any help would be great

gpuller · Post by **gpuller** » Sun Dec 20, 2015 8:25 pm

Cyclone/Liquifire all use a VM34 carb. You'd probably have to do some jetting.

Check this link, service manual for Cyclone/Liquifire.

http://www.vintagesnow.com/John_Deere_f ... one_SM.pdf

harleysportster · Post by **harleysportster** » Sun Dec 20, 2015 9:18 pm

The Liquifire swap is common. The 340 carbs use the same carb body. Jet the carbs using the 76 liquifire carb specs as a starting point.

Sent from my XT1080 using Tapatalk

heiner921 · Post by **heiner921** » Mon Dec 21, 2015 10:43 am

[quote="harleysportster"]The Liquifire swap is common. The 340 carbs use the same carb body. Jet the carbs using the 76 liquifire carb specs as a starting point.

should i use the 340 or 440 liquifire specs?

gpuller · Post by **gpuller** » Mon Dec 21, 2015 11:49 pm

You should start with the 440 jetting.

heiner921 · Post by **heiner921** » Tue Dec 22, 2015 10:10 am

can anyone give me jets sizes for the 440? or a place where i can find that info?

gpuller · Post by **gpuller** » Tue Dec 22, 2015 1:28 pm

heiner921 wrote:can anyone give me jets sizes for the 440? or a place where i can find that info?

I posted a link to the service manual, its in there.

heiner921 · Post by **heiner921** » Tue Dec 22, 2015 3:47 pm

thank you

heiner921 · Post by **heiner921** » Thu Dec 24, 2015 8:51 am

How are you mounting coils and cdi box? They are mount on a plat that bolts to the single carb intake. Obviously won't work with the dual carb setup. And on the l/c motor they are mounted right to the case

harleysportster · Post by **harleysportster** » Thu Dec 24, 2015 9:28 am

Here is a picture of one of the members here of his conversion. He modified the bottom of the coil mounting plate.

JDT · Post by **JDT** » Thu Dec 24, 2015 9:31 am

However you chose to mount the ignition system make sure it is bonded (grounded) to the engine case.
This can be done with direct mounting metal to metal or by use of a grounding strap if you chose to remote mount it from the engine.

heiner921 · Post by **heiner921** » Sat Dec 26, 2015 10:46 am

harleysportster wrote:Here is a picture of one of the members here of his conversion. He modified the bottom of the coil mounting plate.

do you know the member who did this? i have a few more questions for him...

harleysportster · Post by **harleysportster** » Sat Dec 26, 2015 12:41 pm

His name is Eric Anderson aka... 427cobra. I believe he has since sold the Cyclone. He does pop in and out occasionally.

dual carb swap cyclone

dual carb swap cyclone

Re: dual carb swap cyclone

Re: dual carb swap cyclone

Re: dual carb swap cyclone

Re: dual carb swap cyclone

Re: dual carb swap cyclone

Re: dual carb swap cyclone

Re: dual carb swap cyclone

Re: dual carb swap cyclone

Re: dual carb swap cyclone

Re: dual carb swap cyclone

Re: dual carb swap cyclone

Re: dual carb swap cyclone