Swapping a 670 ROTAX Engine into a 1996 SKI-DOO Formula SLS 500

[@KR-qs3rt]

Thanks for doing sled videos in the summer.. Us snow freaks can never get enough of a good thing. And it's always fun learning the tricks and Idiosyncrasies of each different type of brand.. Great job on this one as always. Thanx again.

[@StreetersGarage]

Glad you like them!

[@nathanielkeck4915]

the 500 that came in those had tons of power, gonna fly now! also those sleds are SUPER rare

[@StreetersGarage]

Not sure about the rare factor. I routinely see them for sale in my area and they typically have a bad engine.

[@snowking55]

Nice job on the transplant Tom. Sounds like a lot of work to get the engine lined up, but it's necessary. It looks like the drive clutch is awful close to the secondary, but I'm not that familiar with Skidoo. Great to see someone wrenching on sleds during the summer, it helps take your mind off of the heat.

[@StreetersGarage]

Thanks Ken. I’m waiting for the alignment tool to come in. Wait till you see how much slop / adjustment is built into these sleds. It’s concerning. Lol

[@mykelgreene911]

That sled must haul balls down the trail!

[@StreetersGarage]

Should be a rocket!

[@kennethfarquhar8518]

My 670 H/O absolutely hauled ass . Had a 700 after the just couldn’t touch it .

[@StreetersGarage]

Nice! The 670 is a great engine

[@CooperMine-e9d]

Is there any way you could make a video on how to adjust your secondary clutch? I can’t find any videos on that style clutch. It would be much appreciated thanks!

[@StreetersGarage]

I no longer have the sled unfortunately

[@ourkid2000]

Wait, if you have to take the ring gear off to align everything, how do you get the ring back on without screwing up the work you just did?

[@StreetersGarage]

With the ring gear off the clutch and the clutch installed. You do the alignment and lock down the engine mounts so nothing moves. You’ll then remove the clutch again, reinstall the ring gear and install the clutch again. It helps to have a spare clutch without the ring gear as well.

[@jaywood1763]

What motor plate did you use ?

[@StreetersGarage]

670. It drops right in to the existing bolt holes in the bulkhead

[@JosephNichols-p7f]

Can you pls help me I need help with adjustments for my carb my sled idals at 7000rpms and runs rough I don't know what my gas jet and air screw need to be set at and the top for my throttle canbel

[@StreetersGarage]

7000 or 700?

[@JosephNichols-p7f]

@@StreetersGarage it idals between 6-7 rpm more on 7 it idals rough I took the belt off and put the parking break on every time I start it or it takes of

[@JosephNichols-p7f]

@@StreetersGarage I have the air screw at ona & half turns and the idal screw out at one and a quarter of a turn on the throttle cables are out almost all the way on the top of my carbs

[@StreetersGarage]

Ok. Take a look at this video. It walks you through the entire process of synchronizing the carbs. Even though it’s a Polaris the principle is the same. Skidoo wants you to set the slide height from the engine side of the carb with a .080 drill. Air screw should be around 1 3/4 and 2 turns. Out from lightly seated. kzbin.info/www/bejne/h2jaipysZb53n68si=72c6Pybz6CABxbiJ