19/43 gering hows the top end

[94fordguy]

i did 18-40 on my 05 900 166 and it woke it up big time and i can still run 85-90 on the trails if i want , but i ussually run 70

I thought I read somewhere that the 166 isn't meant to be run at high speeds, that it can start to tear itself apart, is there any truth to that if you were to maintain a ground speed of 75 MPH on the trail for a prolonged amount of time?

A lot of guys say they have no troubles with the 18T top gear but when you look at one that is a nasty bend radius and less teeth in contact with the chain. I'm running 19/43 (2.26) right now and I'm thinking of going to 20/45 (2.25) just to make sure.

What kind of top speed can you get with a combo of 19/43? I am looking to set up my sled at 19:43, but I still want to be able to run at at least 70-75MPH on the trail when the opportunity presents itself. I realize the 166 is not exactly a trail racing track, but my buddy likes to scoot down the trail on his M1 and I don't want to have to have it pinned just to keep 70MPH if I gear down.

Would 19/43 be a safe choice to still be able to carry decent trail speed?

My 02 800 is set at 19/41 and it has just a touch more go than I need most of the time(80-85MPH) but I don't want to be slowed down by a huge amount, its pretty good how it is.

Thanks

 

[guidoxpress]

Seth..

my 18/40t on my 166 is great..i can still pull 70-75mph..YES you can delaminate your track if you maintain a constant high speed...but i dont think i have ever held 70mph for more then 5-10 seconds..you can safely cruise at 60-65 with no worries...

maybe someone will confirm how "long" you can fly at higher speeds before complete destruction...but i wont be trying it, lol..

also make sure you get a good helix as well..it will complete what your looking for..go with the team 719 or 720 helix combo...i promise, its the best you will find...

run the red/pink team secondary spring as well..regardless of your altitude..or you can play with the red/black, black/white...but red/pink seems to be the popular choice

 

[diamonddave]

My 06 900 166 sure likes the 19/42 combo. It has plenty of top speed but I usually kick it on the trails. I don't trust the bongwater drinkers comin at me enough to take my 166 into blind corners at 70, unless we're breakin fresh tracks in the morning then hi speed sliding counter steers on a 166 can be interesting and fun. Hi speed trail riding is a mid-west thing anyway.

 

[94fordguy]

My 06 900 166 sure likes the 19/42 combo. It has plenty of top speed but I usually kick it on the trails. I don't trust the bongwater drinkers comin at me enough to take my 166 into blind corners at 70, unless we're breakin fresh tracks in the morning then hi speed sliding counter steers on a 166 can be interesting and fun. Hi speed trail riding is a mid-west thing anyway.

hahaha, in my scenario I wasn't refering to running corners as if I was on a race track, we get some good straightaways on a couple trails we have and that is more to what I was referring too, I can't stand people who go into blind corners like that, it's just plain dangerous when you think about it.

All I meant to ask was if I can safely hold 70-75for a mile or two at a time b4 slowing back down to 55ish and if 19/43 would have me screaming to do it, it looks like I will be pretty safe from the sound of it

 

[Rick!]

hahaha, in my scenario I wasn't refering to running corners as if I was on a race track, we get some good straightaways on a couple trails we have and that is more to what I was referring too, I can't stand people who go into blind corners like that, it's just plain dangerous when you think about it.

All I meant to ask was if I can safely hold 70-75for a mile or two at a time b4 slowing back down to 55ish and if 19/43 would have me screaming to do it, it looks like I will be pretty safe from the sound of it

I had 19/43 in my 05 900 with an SLP system and some really hard engine mounts. It worked ok in the hills but lacked ground speed before going vertical but was way better than stock. Belts lasted way longer with this gearing. If I would have clutched it better maybe it would have got some ground speed back.

It would go about 78-81mph at low elevations for about 45 seconds to a minute and then you could feel it nose over and the belt would explode. This pattern repeated several times so I stopped holding the throttle taped for any length of time. YMMV.

 

[diamonddave]

hahaha, in my scenario I wasn't refering to running corners as if I was on a race track, we get some good straightaways on a couple trails we have and that is more to what I was referring too, I can't stand people who go into blind corners like that, it's just plain dangerous when you think about it.

All I meant to ask was if I can safely hold 70-75for a mile or two at a time b4 slowing back down to 55ish and if 19/43 would have me screaming to do it, it looks like I will be pretty safe from the sound of it

The gearing will definately allow for those speeds. Krat had a spreadsheet for gearing, etc. and I just deleted it off my puter. If you search his posts, you'll find it

 

[Dogmeat]

19/43 hows the top end on the 900rmk lossing 4t how much will this hurt the top end will it bring up my rpm? 900 rmk 151 2.4track I run 7550 on the rpm now

I lost about 3 mph was all .... which more than made up for what I gained on the bottom end.

 

[INDEEP]

http://www.racenssr.com/calc.htm

 

[RKANYZ]

can you run the stock chain with 19/42's?

 

[94fordguy]

can you run the stock chain with 19/42's?

yup

 

[guidoxpress]

nope

can you run the stock chain with 19/42's?

sorry to inform you..but a 19/42 gear combo will NOT fit on an 05 900 with the stock chain..ONLY 06 with a smaller chaincase will it work stock

i believe you will have to get around a 92pitch chain..but do not quote me on the pitch...but i do know the 19/42 will not work..

your best bet is to go 19/39, or 18/40 using stock chain..

i will look up some past threads on the samething and see what info i can find for you...

hopefully others will chime in also for some help...

PLEASE USE THE 900 SUB-FORUM WE HAVE FOR THESE QUESTIONS PLEASE

 

[94fordguy]

sorry to inform you..but a 19/42 gear combo will NOT fit on an 05 900 with the stock chain..ONLY 06 with a smaller chaincase will it work stock

i believe you will have to get around a 76pitch chain..but do not quote me on the pitch...but i do know the 19/42 will not work..

your best bet is to go 19/43, or 18/40 using stock chain..

i will look up some past threads on the samething and see what info i can find for you...

hopefully others will chime in also for some help...

PLEASE USE THE 900 SUB-FORUM WE HAVE FOR THESE QUESTIONS PLEASE

I am going to have to disagree with you on this one Sean,

According to the Polaris 2005 Deep Snow Service Manual page 7.2 on gearing combos, both a 19/42 combination (2.21) and a 19/43 combination (2.26) can be accomplished with a 74p chain.

 

[guidoxpress]

I am going to have to disagree with you on this one Sean,

According to the Polaris 2005 Deep Snow Service Manual page 7.2 on gearing combos, both a 19/42 combination (2.21) and a 19/43 combination (2.26) can be accomplished with a 74p chain.

Seth.

LOL..no worries, we can agree to disagree..but im right HAHA..if i had a 42T i would install it to prove it..

here is a link on some gearing questions from jan 09..
http://900club.takeforum.com/2007/11/12/gearingchain-length-chart-for-the-2005-900rmk/page1/

BTW..the pic above of the gearing combos is for 7.92" chaincase on the edge chassis..and the 06+ IQs..the 05 have a 11.35" chaincase...(74p chain for 06, and 90p for 05..stock)

i would go with 19/39 or 18/40 if you wanna keep your stock chain, this will keep your clutches the coolest with the least amount of belt heat..BUT, be advised you may have to adjust your clutching to accomadate the gear change..(too much load on motor, less weight....less load on motor, add more clutch weight)..

 

[94fordguy]

Seth.

LOL..no worries, we can agree to disagree..but im right HAHA..if i had a 42T i would install it to prove it..

here is a link on some gearing questions from jan 09..
http://900club.takeforum.com/2007/11/12/gearingchain-length-chart-for-the-2005-900rmk/page1/

BTW..the pic above of the gearing combos is for 7.92" chaincase on the edge chassis..and the 06+ IQs..the 05 have a 11.35" chaincase...(74p chain for 06, and 90p for 05..stock)

i would go with 19/39 or 18/40 if you wanna keep your stock chain, this will keep your clutches the coolest with the least amount of belt heat..BUT, be advised you may have to adjust your clutching to accomadate the gear change..(too much load on motor, less weight....less load on motor, add more clutch weight)..

Ya Sean, you are correct. After making that post I did some more studying on the manual and searching around the forum and came to the same conclusion... just strange that the manual wouldn't post a gear set chart for the 05 900s... that was what really threw me through a loop.

I understand the whole gearing and clutching relationship, it was just that the chaincases had different center to center dimensions and that is what lost me, I didn't realize that was where the bust came in.

I learn something new every day, lol

 

[sleddude]

Seth.

LOL..no worries, we can agree to disagree..but im right HAHA..if i had a 42T i would install it to prove it..

here is a link on some gearing questions from jan 09..
http://900club.takeforum.com/2007/11/12/gearingchain-length-chart-for-the-2005-900rmk/page1/

BTW..the pic above of the gearing combos is for 7.92" chaincase on the edge chassis..and the 06+ IQs..the 05 have a 11.35" chaincase...(74p chain for 06, and 90p for 05..stock)

i would go with 19/39 or 18/40 if you wanna keep your stock chain, this will keep your clutches the coolest with the least amount of belt heat..BUT, be advised you may have to adjust your clutching to accomadate the gear change..(too much load on motor, less weight....less load on motor, add more clutch weight)..

I think the new chain case for 2006 to current is the 8.373 which would include the 06 900. Anyone have a chart for the gearing options?

 

[sleddude]

Krats chart

His chart works good. Pretty cool.

http://www.snowest.com/forum/showthread.php?t=123432

 

[rmk-rider]

I have an 03 700 rmk with a 144 track. Could I still use the stock chain and fit 19-40 gears on it. How would that effect the bottom and top end? Could I go to 19-41 with the stock chain? What would a 40 tooth gear cost?

Thanks