Gear down 09 XP
- Thread starter bluefinger
- Start date
I guess it is hard to tell anything with gearing and clutching in this Spring snow. I am running the 19 right now and it feels as if I have lost some track speed. I am only getting 45mph out of it going uphill in the heavy snow. I don't want to go back to the 21 because of belt heat, I was thinking of splitting the difference and running the 20.
I had my 08 running sweet then I wrecked it. I know that the clutching is different on the 09 so I am contemplating putting my modified 08 clutching back in over the summer.
If you do go to a 20 let me know how it works out compared to the 19?? Its is tough to tell in these heavy snow conditions though. I rode saturday in 3' of incredible fluff pow and went back sunday to half the pow and setting up quickly... 45 mph in the steep/deep is pretty good!! Many guys are happy with 40-42...
My clutching is stock... thats my summer project just not sure what to run for optimum performance??
Xrider, I would put a 20 in. You have alot less track to turn and should see good results with the 20... Good luck!
Might have to wait until next season. I can't remember what I have for my clutch setup, it's laying on my workbench now.
S
SylvanLaker
Well-known member
Yup, don't care what anyone else says, My XP outpulls others and I have the 19t gear in there. It is set up only for deep snow. I don't care if track speed is down on the flats. You don't reach high shift ratios like that under deep snow load. 90 kmh vs 65-70 inthe deep snow..
'09 xp 163" stock gearing and my '08 163" with the 20 tooth. I have NOT found an '09 to out perform my '08 yet. I do have the camo extreme too but my belts are way cooler then the '09.
Rode with and '09 163" with 19 tooth gear and I have to be honest. Dissapointing to see that thing go. Does NOT work. If you climb in the steep and deep and like to boondock only go down 1 tooth. 2 is too many IMHO.
Chaz
Rode with and '09 163" with 19 tooth gear and I have to be honest. Dissapointing to see that thing go. Does NOT work. If you climb in the steep and deep and like to boondock only go down 1 tooth. 2 is too many IMHO.
Chaz
I think what XP174 was saying is you want to run at a 1:1 ratio under your most common full load. This leaves you the overdrive ratio for the trail home.
Some are missing the boat here...if you gear down you drastically change the torque sensing range of the drive system which requires extensive tuning in both the primary and secondary to work properly. JMHO...good luck.
Tech tip form Snow tech mag.
For what it's worth this is straight out of the new snow tech mag.
The Ski-doo summit xp 154 models came from the factory with 21/45 (2.14) gearing in the chaincase. This has been found to be possibly too tall for machines operated aggressively in deep snow or at extreme elevations. For these environments, changing the gearing to a lower ratio like 21/49 (2.33) like the 163" summit comes with improves the performance and drive belt durability. A 19/45 (2.36) ratio could also be considered, but is not as ideal as the larger diameter 21-tooth upper ( in combination with the 49-tooth lower).
For what it's worth this is straight out of the new snow tech mag.
The Ski-doo summit xp 154 models came from the factory with 21/45 (2.14) gearing in the chaincase. This has been found to be possibly too tall for machines operated aggressively in deep snow or at extreme elevations. For these environments, changing the gearing to a lower ratio like 21/49 (2.33) like the 163" summit comes with improves the performance and drive belt durability. A 19/45 (2.36) ratio could also be considered, but is not as ideal as the larger diameter 21-tooth upper ( in combination with the 49-tooth lower).
X2....yep, the lower the gearing the easier it upshifts, also the secondary doesn't get as much load from the track. Clutching changes are almost mandatory with gearing changes unless your setup is not correct to begin with.
That commentary is based on the fact that the stock chain is not optimal with the 19 tooth upper gear setup (creates a pretty big dogleg w. the tensioner). That said, Ski-Doo changed out thousands of these on the '08s (including mine) under warranty, without replacing the chain. And, I haven't heard of any issues related to that setup so far.
I just installed a 19 tooth on my '09 154, which has a DJ kit as well. Way better than stock in every respect IMO (aside from top end speed), especially on long climbs in deep snow. Sled just goes and goes.
R
Red-eye
Well-known member
My stock 08 xp runs a 20/45 with a 154 track, have hit 49 mph track speed in the steep and deep. today it ran run after run at 60 deg F and I could put my hand on the clutches ,Aligned my clutches (4 mil out) and now run a Supertorquer CRA clutch kit with 52 grams and on clicker 1 (8300 rpm)This sled rocks! ( i weigh 215 naked )
Murdock Your lost
Get a copy of Olaf Aaen's clutching book. You should be able to google it and get a copy online.
Get a copy of Olaf Aaen's clutching book. You should be able to google it and get a copy online.
Can you add to the chain if you put on a 49 lower gear or do you have to buy a new one?
J
johnny be bad
Well-known member
i tried both!!! liked the 20 better! 19 slowed it down to much!
gears
163 guys have 21/49....ONLY at 9000' or higher and /or rider weighs 250++ lbs should he gear to 20/49
154 guys have 21/45...stock gearing is correct for low elevation 0-3000'...20 top for everyone else...NOW the 19 is tough, I will agree it works BUT only if riding style matches...IMHO a 154 guy that wants the lower ratio run a 20/47 and this is for 9000' or higher and/or 250 lb rider....
146 guys have 23/45 (2008) and 21/45 (2009)...IMHO the 2009 gear is spot on...BJ
BTW- anything OT says is pure "over the shoulder tuning" not to be confused with "the guy who does it for living"....Slim said it best..."I stayed at the Holiday INN last, let me reclutch your sled"...LOL
163 guys have 21/49....ONLY at 9000' or higher and /or rider weighs 250++ lbs should he gear to 20/49
154 guys have 21/45...stock gearing is correct for low elevation 0-3000'...20 top for everyone else...NOW the 19 is tough, I will agree it works BUT only if riding style matches...IMHO a 154 guy that wants the lower ratio run a 20/47 and this is for 9000' or higher and/or 250 lb rider....
146 guys have 23/45 (2008) and 21/45 (2009)...IMHO the 2009 gear is spot on...BJ
BTW- anything OT says is pure "over the shoulder tuning" not to be confused with "the guy who does it for living"....Slim said it best..."I stayed at the Holiday INN last, let me reclutch your sled"...LOL
Just a reminder the whole gearing down theory has been over played by the the likes of BJ and others for years. Here's another thought....some of you guys should clean out your chaincase more often. Running clean oil can give your sled an edge as well.
OT
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I think if I were to say something like that, it would be an embarrassing and insufficient comment on its face.
that is about as informative as "use oil in your chaincase, not water"
