Jump to content

Recommended Posts

Posted

So here's the deal. I have a 99 Formula Deluxe 670, and I have been thinking about doing a little work to it. The engine is bullet-proof so I don't want to fiddle with it, but I was thinking of upgrading the clutching. My plan is for a new variable helix and spings. I want to try and get it to launch at 5800rpm or so. I am open to any other ideas you guys might have.

Posted
So here's the deal. I have a 99 Formula Deluxe 670, and I have been thinking about doing a little work to it. The engine is bullet-proof so I don't want to fiddle with it, but I was thinking of upgrading the clutching. My plan is for a new variable helix and spings. I want to try and get it to launch at 5800rpm or so. I am open to any other ideas you guys might have.

 

As I've said before I'm way out of touch, but isn't that a pretty violent engagement for a trail sled? We barely kicked in that high with the track sleds back in the day.

 

JF

Posted
As I've said before I'm way out of touch, but isn't that a pretty violent engagement for a trail sled? We barely kicked in that high with the track sleds back in the day.

 

JF

 

 

Cmon John...out of touch??? i thought he was talking about a Formula Firebird ... :dunno:

Posted

its designed as a trail sled but it still has all the same bits and peices as the mxz and the formula 3, just set up for a smoother ride.

5800rpm might be a little high but thats why I'm looking for imput.

Posted

ok from my expierence 2-300 rpm over stock and a good clutch set up will give you great results and still be reliable ,that 5800 will eat belts up pretty good and will make for a pretty poor riding sled, if you want similar performance to the formulas and mxz's change the to one lower gear in the chain case

Posted

ya 5800 is wayy to high, i've had race sleds in the past and they didnt engage that high, usually around the 5000mark. thats probably the highest you want it to engage. i say find a clutch kit and put it to the recommended settings then do as ecmiley says and change the gear in the chaincase(top gear) you probably have something like a 22 tooth gear in there. i believe you can drop down to a 19 without changing the chain. most 440 snocross sleds run the 19tooth, it'll drop your top end by a bit but off the line you'll be flying! go on dootalk and find out what the best clutch kit is for your sled and the best price. good to hear you want to do clutching and not something dumb like a sweeet ca for it haha!

Posted

So your just wanting to sit there and dig holes? My cat had some work done to it and ended up taking off at about 6grand and it was a pain in the ass.. Woke up the whole neighbourhood trying to take off, try to pull anything and it just dug holes, Tries to throw passengers off the back on take off. So i played around and got it back to 4500 and its perfect.

Posted

Terry and I both have 500 Skidoo's with identical approx 3/4" paddle tracks.. I can drive up just about anything (with two on and pulling the cutter) and pull away on any surface without spinning the track. Terry gets stuck on flat ground.. solo... and I believe that is from his clutch being set to engage at too high an RPM (and we're gonna fix that right Terry?)... 5800rpm.... like has been said you're gonna dig holes!

Posted

cool..thanks guys. Checked out dootalk, lots of good info on there. I'll let you know how it turns out once we get some solid ice here.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Recent Topics

    Popular Topics

    Upcoming Events

    No upcoming events found

×
×
  • Create New...