cat 500cc free air

[sno-dogg]

ok guys i'm going to do a Cat F/A 500cc suzy motor and was wondering if you guys have any tips on the rebiuld ,motor is all apart  now and is missing a few parts,cdi box ,and carbs and PTO block (jug) are these motors one or two ringed pistons? never had a cat F/A before, had a 400 F/A rotax many years ago and it's a 1 ring piston,,so any info would be great..

[Vintagesleds.com]

[duane]

Run the stator that you can still get cdi's for

[sno-dogg]

ok ,what fits??

[moose17n]

what model engine is it? give me the numbers off the motor tag if you can-moose

[kyot]

What year ?
4 port or 6 port motor ?

[sno-dogg]

sorry guys it took so long to get to get back to you ,comp crashed big time and it took 3 days ti get it back on line .but as you can see i'm back and i will get the info off the motor ..the year of the motor i do not know but i'm thinking 76 or 77 not sure dont play with cats much..dont know how many ports will check that too ..got work in the shop tonight taking a clutch off a 77-78 screw-on 340 TnT...so i will get all info that i can get .ok..

[sno-dogg]

ok guys need more info on this type of motor ..Pros and Cons please  ..would like to know more about it before putting money in it...

[Cheetah73]

i'm back and i will get the info off the motor ..the year of the motor i do not know but i'm thinking 76 or 77 not sure ...dont know how many ports will check that too .....so i will get all info that i can get .ok..

when are you going to get the info the guys need in order to help you???

[77chris]

76-77 F/A cats had the Spirit 500 with 4 port cylinders.  If needed, L.A. sleeve has options to sleeve these cylinders.

[sno-dogg]

Arctic Cat Spirit  ,,,series 500F A.....bore 70mm,,stroke 65mm....manufactured by suzuki motor co.ltd..made in japan....i see 6 ports in cylinder,,7 if you count the 2 ports for the intake...i'v no clue on year i just got the motor no sled sorry guy can't help you were..still want the Pros and Cons of these motor ,i hear good and bad things about them so i'd like to know what you think the Pros and Cons are ..

[twinrotor]

I dont like the fact that they chatter the crank bearing surfaces in the crankcase. CDs are hard to find for the newer version. They always started good but seem to run a little rich in the mid range.

[sno-dogg]

good to know..forgot to add that it's a duel mik set-up or it was the guy i got it from kept the carbs ..only reason Y i took the motor is it was a package deal or i did get the 73 440 rotax with what looks like a new power block clutch....

[sno-dogg]

what else guys?

[kenneykole]

500cc free air seems to be a good engine to me, and its good for racing. I have few el tigres, one 76 and two 79 and 80 el tigre 5000 with 500cc free air, and never had any problem. So dont have any cons. 
The older el tigre like 76 to 77 has 4 ports,  and 78 to 81 added two more ports stock for better high rpm and more power, also has bigger fins for better cooling. If you see 6 ports inside, well its could be from between 78 to 81. They are fast and 78-81 500cc has 62 to 65hp. older 500 has probably around 55hp.

[sno-dogg]

yup it' has 6 ports ..the carb port is split in two Y?? ,, as you can see i know very little about cats ,the late cat i had was 8 years ago and it was my first cat.it was a lynx 2 with a 340 kawy ..that sled pee me off big time took me 6 months to find out the crank casing was no good ..stilling it would run great ,take it for a ride and you'd just get back to the shop ,did every thing you could think off and nothing worked so i changed cases and the problem was gone and man that little sled moved right out..sold it to a 10 year old and he fried it that spring ,he drove it all day in +10c as you can guess motor was done..also had a 72-73 panther 440 i think never got to ride that one sold it before i even got it running, oh well thats life .now i'm working on a deal for two pantara's for $80 .i'm told they are free air sleds ,looked quick at one body but it had no motor , the other has motor a 500cc F/A.missing flywheel and starter plate, but i'v not seen it so i'm going on info that i was told ..