For support please email or pm Christopher christopher@snowestonline.com



Upgrade to Premium
Polaris: GEN 1 and older 1998 and older, all models in the Gen 1 Indy chassis and older chassis models
Reply
 
Share Thread Tools Display Modes
  #1  
Old 03-14-2018, 09:09 PM
Rob97 Rob97 is offline
Currently: Not set.
Join Date: Feb 2018
Location: La Pine
Basic Member
Age: 27
Posts: 12
Thanks: 2
Thanked 0 Times in 0 Posts
Rep Power: 0
Rob97 has a brilliant futureRob97 has a brilliant futureRob97 has a brilliant futureRob97 has a brilliant futureRob97 has a brilliant futureRob97 has a brilliant futureRob97 has a brilliant futureRob97 has a brilliant futureRob97 has a brilliant futureRob97 has a brilliant futureRob97 has a brilliant future
Default 96’ ultra sp 680 gearing questions.

Have a 96’ ultra sp 680 that I’m trying to dial in. I Am jetted for my elevation (5000-10000) properly clutched also forgot my weight right now have been switching to much for setup (8200 max rpm) have been playing with Polaris blue and arctic cat yellow/green seeing what is working better. Cat gives a higher engagement but also bogs slightly under 10mph and the Polaris engagement is a little lower with less bog but still low on power under 10 mph which makes for poor off trail riding. Sled has a big wheel kit and a 136”x1.5” track with an 8 tooth driver and currently has 21T 35B for gearing which is where I think my problem is. Was running a 20T 35B which was slightly better but not much.

This was someone else’s mod sled back in the day that I picked up super cheap because it needed a rebuild and I had a fresh bottom end laying around. So the sled has a freshly trued crank with fresh top end. Clutch was fully rebuilt also at the time with all new roller, bushings, and springs also shimmed for new belt clearances.

Any input greatly appreciated, will be playing with different gearing setups a few times a week due to having about any gear setup available.

Thanks for your time everyone.
Reply With Quote


Rate this post: Yes | No
  #2  
Old 03-15-2018, 10:34 AM
ultra800 ultra800 is offline
Currently: Not set.
Join Date: Jan 2008
Posts: 37
Thanks: 1
Thanked 3 Times in 3 Posts
Rep Power: 0
ultra800 has a reputation beyond reputeultra800 has a reputation beyond reputeultra800 has a reputation beyond reputeultra800 has a reputation beyond reputeultra800 has a reputation beyond reputeultra800 has a reputation beyond reputeultra800 has a reputation beyond reputeultra800 has a reputation beyond reputeultra800 has a reputation beyond reputeultra800 has a reputation beyond reputeultra800 has a reputation beyond repute
Default Gearing

Put a 39 on the bottom! Have the clutch shimmed too .015- .020 gap between the belt. sink the carbs

Last edited by ultra800; 03-15-2018 at 10:37 AM.
Reply With Quote


Rate this post: Yes | No
The Following User Says Thank You to ultra800 For This Useful Post:
Rob97 (03-15-2018)
  #3  
Old 03-15-2018, 10:52 AM
Rob97 Rob97 is offline
Currently: Not set.
Join Date: Feb 2018
Location: La Pine
Basic Member
Age: 27
Posts: 12
Thanks: 2
Thanked 0 Times in 0 Posts
Rep Power: 0
Rob97 has a brilliant futureRob97 has a brilliant futureRob97 has a brilliant futureRob97 has a brilliant futureRob97 has a brilliant futureRob97 has a brilliant futureRob97 has a brilliant futureRob97 has a brilliant futureRob97 has a brilliant futureRob97 has a brilliant futureRob97 has a brilliant future
Default

carbs have been synced, belt clearance was shimmed to .015 during rebuild. have the chain case apart now and hunting for a 39 bottom in our box of gears here.

Thanks for the reply i will let you know how the 39 bottom works out should be going out again this evening for a ride and testing. having snow at the house would make this much easier.
Reply With Quote


Rate this post: Yes | No
  #4  
Old 03-15-2018, 10:23 PM
Rob97 Rob97 is offline
Currently: Not set.
Join Date: Feb 2018
Location: La Pine
Basic Member
Age: 27
Posts: 12
Thanks: 2
Thanked 0 Times in 0 Posts
Rep Power: 0
Rob97 has a brilliant futureRob97 has a brilliant futureRob97 has a brilliant futureRob97 has a brilliant futureRob97 has a brilliant futureRob97 has a brilliant futureRob97 has a brilliant futureRob97 has a brilliant futureRob97 has a brilliant futureRob97 has a brilliant futureRob97 has a brilliant future
Default

Couldn’t find a 39 bottom. Ended up inspecting secondary and found the spring not into its retainer spot of the sheave not the helix. Had excessive casting markings preventing the spring from seating fully in its whole. Cleaned the clutch inspected buttons put together. Also found a Polaris red primary that I tested out. Engagement was much better and max rpm is right. I did a sharpy test mark in the clutch to see how high the belt is riding to see if I could Change gearing anymore and the belt is running about .5” from the top of the clutch so limited in my gearing options but am happy with the set up. Great low end now and 80mph top end which is fast enough as I use it as a mtn sled.
Thanks for the input to all.
Reply With Quote


Rate this post: Yes | No
  #5  
Old 03-16-2018, 12:46 PM
sno*jet sno*jet is online now
Currently: Not set.
Join Date: Dec 2007
Age: 38
Posts: 1,578
Thanks: 321
Thanked 289 Times in 212 Posts
Rep Power: 16885180
sno*jet has a reputation beyond reputesno*jet has a reputation beyond reputesno*jet has a reputation beyond reputesno*jet has a reputation beyond reputesno*jet has a reputation beyond reputesno*jet has a reputation beyond reputesno*jet has a reputation beyond reputesno*jet has a reputation beyond reputesno*jet has a reputation beyond reputesno*jet has a reputation beyond reputesno*jet has a reputation beyond repute
Default

why the 8 tooth drivers? what pipes are on it?
i would put in 9 tooths or swap in a 2" paddle and 19/39 gears since its used for mtn riding.
Reply With Quote


Rate this post: Yes | No
  #6  
Old 03-16-2018, 07:52 PM
Rob97 Rob97 is offline
Currently: Not set.
Join Date: Feb 2018
Location: La Pine
Basic Member
Age: 27
Posts: 12
Thanks: 2
Thanked 0 Times in 0 Posts
Rep Power: 0
Rob97 has a brilliant futureRob97 has a brilliant futureRob97 has a brilliant futureRob97 has a brilliant futureRob97 has a brilliant futureRob97 has a brilliant futureRob97 has a brilliant futureRob97 has a brilliant futureRob97 has a brilliant futureRob97 has a brilliant futureRob97 has a brilliant future
Default

Stock pipes, in my experience the 9 tooth driver on a larger lug track will hit the bulkhead. This is just a back up spare sled so keeping budget low. Will take a set of 19-39 and try them. Am almost happy enough with it to leave it but will try that gear setup and see how it goes and let you know. Going to ride Sunday so will let you know Sunday evening.

Thank you for your input.
Reply With Quote


Rate this post: Yes | No
  #7  
Old 03-17-2018, 07:36 AM
mtnclimber19's Avatar
mtnclimber19 mtnclimber19 is online now
Currently: C'mon and snow already!
Join Date: Mar 2008
Location: Sheridan, wy
Age: 39
Posts: 345
Thanks: 55
Thanked 105 Times in 53 Posts
Rep Power: 7705570
mtnclimber19 has a reputation beyond reputemtnclimber19 has a reputation beyond reputemtnclimber19 has a reputation beyond reputemtnclimber19 has a reputation beyond reputemtnclimber19 has a reputation beyond reputemtnclimber19 has a reputation beyond reputemtnclimber19 has a reputation beyond reputemtnclimber19 has a reputation beyond reputemtnclimber19 has a reputation beyond reputemtnclimber19 has a reputation beyond reputemtnclimber19 has a reputation beyond repute
Default

I might have a 39 tooth gear that I would be willing to part with cheap if you're interested.
Reply With Quote


Rate this post: Yes | No
  #8  
Old 03-23-2018, 01:13 AM
sno*jet sno*jet is online now
Currently: Not set.
Join Date: Dec 2007
Age: 38
Posts: 1,578
Thanks: 321
Thanked 289 Times in 212 Posts
Rep Power: 16885180
sno*jet has a reputation beyond reputesno*jet has a reputation beyond reputesno*jet has a reputation beyond reputesno*jet has a reputation beyond reputesno*jet has a reputation beyond reputesno*jet has a reputation beyond reputesno*jet has a reputation beyond reputesno*jet has a reputation beyond reputesno*jet has a reputation beyond reputesno*jet has a reputation beyond reputesno*jet has a reputation beyond repute
Default

Quote:
Originally Posted by Rob97 View Post
Stock pipes, in my experience the 9 tooth driver on a larger lug track will hit the bulkhead. This is just a back up spare sled so keeping budget low. Will take a set of 19-39 and try them. Am almost happy enough with it to leave it but will try that gear setup and see how it goes and let you know. Going to ride Sunday so will let you know Sunday evening.

Thank you for your input.
so its a single pipe then on an sp i believe.
ive had an sks and rmk '96, both fit 1.5 with 9 tooths easy, maybe sp has a large bulkhead cooler? what track do you have exactly
Reply With Quote


Rate this post: Yes | No
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Thread — 96' 680 Ultra Thread Starter — the4x4kid Forum — Polaris (Swapmeet) Replies — 10 Last Post — 06-07-2010 10:52 PM
Thread — 96 680 ultra slp triple pipes tuning questions Thread Starter — born2sled Forum — Polaris: GEN 1 and older Replies — 2 Last Post — 10-12-2009 05:41 AM
Thread — 680 Ultra Fuel Questions?? Thread Starter — phoenixcattleco Forum — Performance/Modified Replies — 15 Last Post — 02-12-2009 10:32 PM
Thread — Need some help on an 680 Ultra!!!! Thread Starter — Mr. Redrock Forum — General Snowmobiling Replies — 9 Last Post — 04-21-2008 09:17 PM
Thread — 96 ultra 680 Thread Starter — PoWdErJuNkIe91 Forum — Polaris Replies — 3 Last Post — 12-29-2007 05:23 PM

All times are GMT -6. The time now is 03:37 AM.

no new posts