Does anyone know where to find a p-85 that will fit the 07 800R with the ring gear or have any drawings or dimensions that I could use to build one.
Thanks.
Thanks.
P-85 for a Skidoo
- Thread starter Silent Bob
- Start date
B
badass1000
Well-known member
the p85 has to be cut for the taper. the end of the ski doo crank has a different taper then the end of the polaris crank.
sorry I do not know much more then that. Maybee do a search on this forum and the old one. I know I have read posts on how to do it and who to do it. Post up how it works. I am kind of interested.
sorry I do not know much more then that. Maybee do a search on this forum and the old one. I know I have read posts on how to do it and who to do it. Post up how it works. I am kind of interested.
I to would be interestd in how to do this as I have a p-85 on the bench and a pos 07 clutch on the sled that will never pull the same rpm no matter what I have done to it.
I have tried a search many times for P-85 and this post doesn't even show up????
Contact Bill Loftin at Wilderness sports in Id. or Micro-Bellmont, either can set you up with clutch, taper and balance.
I ran one of those about 6 yeas ago on my 800 summit and it doesnt work!! the crank is balanced for the led slug TRA out on the end. if you put a P85 on you not will be able to pull as much weight as you think either, it has the same effect as lightining your flywheel broke the crank twice before we figured out what was happening we eventually ended up making a billit stainless spider to get the weight back + ring gear but then started breaking the clutch off right at the the spider threads even after it was balanced. dont do it!!!!!
try this
Send a PM to "HMFNW" he has researched it a lot and is currently doing it right now, he may have some different insight for you?
Send a PM to "HMFNW" he has researched it a lot and is currently doing it right now, he may have some different insight for you?
Winterbrew--Relay your experiance with the P-85 on a 07 800R.
WB seems to have his 07 800R rocking--he has a clutch kit that makes those 07's clutch issues--disappear!! I rode that thing--and it seriously rips!! Tried getting him to swap sleds with me---NO GO
. I was bummed.
H20SKE...
WB seems to have his 07 800R rocking--he has a clutch kit that makes those 07's clutch issues--disappear!! I rode that thing--and it seriously rips!! Tried getting him to swap sleds with me---NO GO
. I was bummed.H20SKE...
This does work(sort of). I know, I did it all last year. Here's the thing that I found out though. Use a brand new p85, I tried reserecting an old junk yard dog of a clutch and it gave me nothing but troubles. And at the end of the season, when I was in the back of the back bowl of old friend, my clutch decided to take a dump. My rollers wore right out and wouldn't allow it to dis-engage (that was a fun ride out)
Having said all that though, at the start of the season, when all was new and working correctly and dialed in, it worked awsome.
This year I will be running a brand new tra 3 and hope that that p85 didn't *** up my crank too bad, it already had 2 thou runnout when I put it on, prolly something like 4 now. Hopefully it will last the season.
Having said all that though, at the start of the season, when all was new and working correctly and dialed in, it worked awsome.
This year I will be running a brand new tra 3 and hope that that p85 didn't *** up my crank too bad, it already had 2 thou runnout when I put it on, prolly something like 4 now. Hopefully it will last the season.
Winterbrew--Relay your experiance with the P-85 on a 07 800R.
WB seems to have his 07 800R rocking--he has a clutch kit that makes those 07's clutch issues--disappear!! I rode that thing--and it seriously rips!! Tried getting him to swap sleds with me---NO GO
H20SKE...
Thanks for the complement Paul. I ran a P-85 on my '07. It worked very good...BUT! It is about 6 lbs lighter than a TRA7, sled will have ALOT of vibration, even with spin balance. As for crank life, it is very possible it will be shorter with less mass. I did have a failure shortly after going with the P-85, perhaps it was a coincidence, no way to tell for sure. I didn't see any CLEAR gains over a PROPERLY tuned TRA, so IMO it's not worth the risk and the hassle to go to the P-85. I can recommend a good settup for either, PM me if you need details.
Polar primary
If some of you riders are flat landers you might try the Polar primary from Polar Motorsports. They don't seem to have any issues out on the trail.
This will be my second season using the Polar primary in the mountains in BC. I have broke just about everything on the clutch but they design a cure and the clutch keeps lasting longer each time. I have the latest and greatest Polar on the sled now and ready to run.
I don't agree with a light clutch weight causing crank problems as light flywheels on bikes never hurt anything. Most race applications have as light a flywheel as possible, just enough to start the vehicle. In any case the Polar is at least as heavy as the TRA now, and Polar will drill the fixed post to bolt on the TRA ring gear as well. I don't use the ring gear.
The Polar is an amazing in the increase in performance, and you just run whatever stock secondary you have. Set up is easy and it doesn't need any adjustment when I ride from 2,800 ft to 9,000 ft.
Anyway if Polar has beefed up the primary enough I'm thinking BRP should get all the mountain sleds delivered with Polar primary clutches. Certainly would stop all the clutch tuning problems BRP has had.
If some of you riders are flat landers you might try the Polar primary from Polar Motorsports. They don't seem to have any issues out on the trail.
This will be my second season using the Polar primary in the mountains in BC. I have broke just about everything on the clutch but they design a cure and the clutch keeps lasting longer each time. I have the latest and greatest Polar on the sled now and ready to run.
I don't agree with a light clutch weight causing crank problems as light flywheels on bikes never hurt anything. Most race applications have as light a flywheel as possible, just enough to start the vehicle. In any case the Polar is at least as heavy as the TRA now, and Polar will drill the fixed post to bolt on the TRA ring gear as well. I don't use the ring gear.
The Polar is an amazing in the increase in performance, and you just run whatever stock secondary you have. Set up is easy and it doesn't need any adjustment when I ride from 2,800 ft to 9,000 ft.
Anyway if Polar has beefed up the primary enough I'm thinking BRP should get all the mountain sleds delivered with Polar primary clutches. Certainly would stop all the clutch tuning problems BRP has had.
H
HPJUNKIE
Active member
* I think Polar is on the right track, but come on, no adjustment needed in a 5000+ ft elev change...
S
shortstop20
Well-known member
That's what I was thinking. I have three different size weights I use between sea level and 10,000 ft.
I've been thinking about buying an XP as I really like the sled but hearing so many stories about badly fluctuating RPM's and very erratic clutching(even from riders that ride the same elevation most of the time)has me concerned. Especially considering I ride anywhere between sea level and 10K+ feet as I said. I don't get to ride out west more than 2-3 times a year and if I can't have the sled setup good for 7-10K feet before the end of the year I'd be pissed. It's taken me about 1 trip for each elevation to get my Poo setup how I want it. Easy cheesy tuning on a P85.
I've been thinking about buying an XP as I really like the sled but hearing so many stories about badly fluctuating RPM's and very erratic clutching(even from riders that ride the same elevation most of the time)has me concerned. Especially considering I ride anywhere between sea level and 10K+ feet as I said. I don't get to ride out west more than 2-3 times a year and if I can't have the sled setup good for 7-10K feet before the end of the year I'd be pissed. It's taken me about 1 trip for each elevation to get my Poo setup how I want it. Easy cheesy tuning on a P85.
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True. I test run at the feild at the house to check RPM. 2800' at PG Airport.
Our mountain trail starts 3400' and after 4 hours we are on the shoulder of Mt Sir Alexander (10,720') with no adjustments. At about 9,600 feet I'm starting to see RPMs down around the 7900 to 8100 range.
People have to realize the TRA is a very very old design that has serious limitations.
It's just French pride that is standing the way of getting over it and moving on to a better design.
