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View Full Version : Allright you Old sled buff's, What did i find??--Pics now



MTS
07-21-2008, 10:59 PM
Hey,

Got a find here from the dump, It appears to be an Old yamaha Free air twin, dual carb's, Piston port motor, i can only find one number stamped on it, The recoil case assembly is gone,,,dont know if the numbers would been on there, Cant find any Displacement numbers either, i would take a pic but the usb ports on the ol pc are cooked, Anyone have any ideas...??

MTS
07-22-2008, 12:41 AM
Narrowed it down to either a 333 or a 340...? its 356 as it sits,, Not 100% on the Free air thing, too much stuffs missing, dose look like it had a cowling or something bolted to the heads,

trimoto.125
07-22-2008, 07:03 PM
Here is a fast and easy way to tell if your engine is a free air or a fan cooled.
I I
If the cylinder head fins are running parallel to the ski's I IIIIII I its a free air.
I I


If your cylinder head fins are running diagonal like this. //// //// Its a fan cooled.

MTS
07-22-2008, 09:11 PM
kinda figured that, so it is a Fan cooled, Still cant find much, least 340 yamaha's with 2 carbs and 2 pipes...Looks like it will run, no exsessive play, gona clean the carbs and find a coil, n bolt her to the bench..heh

lndy650
07-23-2008, 03:22 PM
its probably an enticer engine??

MTS
07-23-2008, 08:58 PM
i always thought they where sing pipe and carb motors...?? been a while since iv messed with this old sled stuff =P

Jason Hall
07-25-2008, 03:18 PM
It could be an old 433. They had 2 carbs 2 pipes.

MTS
07-30-2008, 11:52 PM
PICS!!

http://img180.imageshack.us/img180/6891/hpim1373eg1.jpg
http://img378.imageshack.us/img378/7038/hpim1374qd5.jpg

350x'inNY
07-31-2008, 05:34 PM
I'm a new pup to vintage sleds... but I've seen a similar engine on an old early 70's Arctic Cat ElTigre... ???

trimoto.125
07-31-2008, 11:19 PM
I'm almost sure it's a 1971 ish yamaha sl338 engine.Oil injected.

http://vintagesleds.com/bs/index.php?PHPSESSID=554c200bf2f64df9b981623f97436f 08&topic=17650.0

trimoto.125
07-31-2008, 11:20 PM
I'm a new pup to vintage sleds... but I've seen a similar engine on an old early 70's Arctic Cat ElTigre... ???

The old eltigres only had the free air type engines and the liuid cooled ones.