Hey guys,
Got my internet in the garage so have almost everything here I need.
Question, does anybody have any information on putting twin mikunis and CDI on my JDX4 340/5?
What I would hope to end up with is a quasi/295s for my X4. Probably need a donor engine from a 340 cyclone to get most of the CDI parts (also need a fan guard in decent condition for the engine...anyone?), and I am assuming that the mikuni specs of the 295s would be a good start to the carb set-up.
Any thoughts?
Thanks
Robin
1972 Ski-Doo Olympique 300
1972 Arctic Cat 340 Cheetah
1974 JDX4
1976 340 Cyclone
1977 Ski-Doo 340E Olympique
1978 Kawasaki 440 Intriguer
1978 Kawasaki 440 Invader
1980 Porsche 924
1985 Ski-Doo Formula Plus
1987 Polaris Indy Sport
2002 Lincoln LS V8
Thank God for big garages...and tolerant wives!.
awesome project !! you will need to make or find 295/s intake manifolds i used the liquifire dual carb set-up no reason those couldnt be made
Attachments
2-1-11 047.JPG (178.91 KiB) Viewed 386 times
jdx4 013.JPG (156.06 KiB) Viewed 386 times
jdx4 012.JPG (158.02 KiB) Viewed 386 times
certificate recipiant of the 12 vintage challenge !! on a 78 liquifre 440,
certificate recipiant of the 13 vintage challenge !! on a 340/s
certificate recipient of the 14 vintage challenge !! on a 78 liquifire 440
joe forgot the certificates for the 2015 vintage challenge
crossed the start/finish line twice at the 2013 and 2014 I500 on a 78 liquifire 440
Cool sled!
I think the CDI is a pretty straight up deal, get a cyclone and bolt it on , but the carbs I am a little more concerned about getting right. I am not exactly sure what the difference is between my 340/5 and the 340rs engine internally (the specs look indentical) maybe bearing sizes etc, so do I go with the VM34's and the 340/s set-up or do I assume that the 340/5 engine/exhaust does not flow as well and go with the VM32's of the 295/s . ..does it really matter? To be quite honest, I understand that I would probably be better off just going with a single carb, but I look at it this way, would I have put a 2 barrel carb on my 1973 Mach 1 (RIP) if I was going to rebuild it from the ground up...ah no.
Any more thoughts?
Robin
1972 Ski-Doo Olympique 300
1972 Arctic Cat 340 Cheetah
1974 JDX4
1976 340 Cyclone
1977 Ski-Doo 340E Olympique
1978 Kawasaki 440 Intriguer
1978 Kawasaki 440 Invader
1980 Porsche 924
1985 Ski-Doo Formula Plus
1987 Polaris Indy Sport
2002 Lincoln LS V8
Thank God for big garages...and tolerant wives!.
the porting on the rs motors is more aggressive but i think it will run fine with 2 34s on it if you have them the 340/s jetting would be a great place to start like i said before tho the intakes may be tough to find and you may just have to make them otherwise it should be a fairly strait foreward deal making the intakes could be done but matching up a flang on the jug end but just using some tubing on the carb end to use a spigot type mount like the sportfires ive seen it done this way on jr dragsters and go-karts with no problem this would eliminate the 2 bolt carb boots too which have been known to leak just my thoughts wade
certificate recipiant of the 12 vintage challenge !! on a 78 liquifre 440,
certificate recipiant of the 13 vintage challenge !! on a 340/s
certificate recipient of the 14 vintage challenge !! on a 78 liquifire 440
joe forgot the certificates for the 2015 vintage challenge
crossed the start/finish line twice at the 2013 and 2014 I500 on a 78 liquifire 440
so have almost everything here I need.
Matt - JDsleds.com Administrator
, but the carbs I am a little more concerned about getting right. I am not exactly sure what the difference is between my 340/5 and the 340rs engine internally (the specs look indentical) maybe bearing sizes etc, so do I go with the VM34's and the 340/s set-up or do I assume that the 340/5 engine/exhaust does not flow as well and go with the VM32's of the 295/s 
. ..does it really matter? To be quite honest, I understand that I would probably be better off just going with a single carb, but I look at it this way, would I have put a 2 barrel carb on my 1973 Mach 1 (RIP) if I was going to rebuild it from the ground up...ah no.