Going to head West soon and I'm hearing many stories of the wrong gearing. The more I thought about it, the more I got confused as to why BRP would have used the gearing they did. I may have over looked something, but shouldn't the base (stock) gearing be the same as last year (19/45)?? It's the same engine, same primary, different secondary (but it still has to match the range of the primary) and the new 8 tooth 2.86 drivers (22.88") are just a touch larger in circumference than the 9 tooth 2.52 (22.68"). This tells me the gears should be the same as last year and even then, many were happier last year going to 19/47 gears. Then to add to my confusion, the Europe models get a 49 tooth bottom instead of a 45. There are things I don't know, like maybe the secondary is larger diameter for a lower ratio coming to the gear box and maybe the new track turns so easy that it should be able to handle a higher gear. Even then, why should the Summits be geared for 100+ MPH. Maybe someone can help, because I just don't get it???
Summit XP Gearing?? Why So High?
- Thread starter 800Gader
- Start date
Oh crystal ball tell us why BRP has their head up there ___.
95MPH is the top speed... there is no explanation for it. It could explain some of the boggin in deep powder
speedo wrong? lol
or where you driving your 76 ford truck hru the deep pow? which i assume has a 400M with 4v heads on it and a fat roller cam?
but seriously, its odd that they would just release a sled thats so unready for the snow.. any info on how the MXZ are running an there other product besides mountain sleds? not that those other sleds matter anyway lol
or where you driving your 76 ford truck hru the deep pow? which i assume has a 400M with 4v heads on it and a fat roller cam?
but seriously, its odd that they would just release a sled thats so unready for the snow.. any info on how the MXZ are running an there other product besides mountain sleds? not that those other sleds matter anyway lol
N
Nubulin
Well-known member
I would imagine it is the wonderful compromise that stock gives you. The M's are the same way.
If they geared it for 9K, some tool would run his WFO at 500ft and blow it up and expect a new one under warrenty.
You don't honestly expect people to be responsible for themselves do you?
If they geared it for 9K, some tool would run his WFO at 500ft and blow it up and expect a new one under warrenty.
You don't honestly expect people to be responsible for themselves do you?
T
trinitypowder
Well-known member
The fastest my 154 X said is 81 mph. Hard packed trail.
I agree with the weight comment as to why they left the gearing where it was. It does make sense that if you have the same HP and a lighter sled it should be able to pull a taller gear.
And when you added HP to your machine the ultimate goal is to be able to gear the machine higher to get more track speed out of the machine. High track speed, higher highmark.
And when you added HP to your machine the ultimate goal is to be able to gear the machine higher to get more track speed out of the machine. High track speed, higher highmark.
D
diggerdown
Well-known member
Hugh profit potential for BRP, $150 belt!
23/45
Apparently for some reason a few have 23/49? But that's still higher than the 07's.
Exactly!! It's all about the $$. Does anyone honestly think they didn't know this would happen with the combination of taller gears, bigger drivers,track that hooks up harder,less primary weight, steeper ramps and a stiffer primary spring?? SOund like a recipe for 3rd degree burns!!
The 154 comes with a 21-45, while the 163 comes with 21-49....And that the reason for the big speeds on the speedo going down trails...On the hill in the mountains the 154 and 163 benifts from 19-45.
OT
OT
T
trinitypowder
Well-known member
I wouldn't call 81 fast. MY 154X XP won't go over that. My '06 151X went 89 before I dropped the gearing one tooth on top. After that, it did 78. Are guys really getting into the 90's?
They are just following the Poo history and trying to sell more expensive belts! Seriously, if you can get the high speed track spin you will go higher but there is a cost to pay on this setup. Polaris found out and Doo is right behind them like normal
S
Skidooer
Well-known member
I wouldn't call 81 fast. MY 154X XP won't go over that. My '06 151X went 89 before I dropped the gearing one tooth on top. After that, it did 78. Are guys really getting into the 90's?
I hit 95 MPH with 21/45 in perfect conditions.
Now I have 19/45 with hot clutches.
T
trinitypowder
Well-known member
That's impressive. I'll try again tomorrow, but I don't think I'll get 95mph
