2019s

[newtron]

His rear wheels are 8.5 inches and mine are 7.5. Does that change the ratio?

 

[ROCKERDAN]

No

Same gears 137 and 129.

 

[fatchance]

^^^^^They are not driven. No effect.

 

[ROCKERDAN]

Dave and Ben will be able to see what stock boost is on srx next yr.....I doubt its any different then other winders.

 

[newtron]

Ok

Well the srx will be safe from gearing out then stock. No way it’ll do 128 mph even with 1 inch track unless it’s perfect conditions on ice

 

[Motorhead]

His rear wheels are 8.5 inches and mine are 7.5. Does that change the ratio?

No.
Maybe Bro is not telling all. May have also added a tooth to top sprocket with his tune.

Your turn to kick it up a notch.

 

[ROCKERDAN]

I would like to see YAM talk about updates....even if they are for 19s....It would be nice to know.

-Belt/clutch updates
-ROV
-Oil tank seal/gasket
-coolant hose shroud
-sight glass problems

Im sure there are other items that people would like to see addressed but these are the ones I seem to see happening most.


In 18, cat/yam added a oil hole to our top gear, there was nothing i ever saw in print about this update. Will YAM update others items finally? And not talk about it? They sure did not change anything with ROV or oil tank seals, or any clutch updates whatsoever.....I think Cat got new clutch updates in 17, so at least it seems cat is looking out for their brand, but YAM has done no updates for belt blowers.

Would be nice to know for guys like me who want to know about updates or fixes. Hard to decide what I want to do when there is no info moving ahead. I dont mind fixing all these issues myself, but would like to know if cat/yam are even considering working on fixes.

Hard to walk away when I love so much about this sled, but I would like to have a certain level of confidence when going on a trip. Not much confidence as of now.

Dan

 

[HMTurbo]

My brothers Ltx 137 inch track taps out at 128 mph gps

My 129 rtx taps out at 122 gps.

The 137 has a higher ratio then the 129 I take it.

He's just getting more shift to a higher ratio in his clutching or less slippage. 5-6 mph is only like .06 different shift ratio at 9000 rpm. (no slippage)

http://www.turboaddictionparts.com/catalog/snowmobilecalculator.html

 

[newtron]

I am up 1 tooth now. I’m good for over 130.

I do all his work so I know what’s done.
He is at 270 hp so it’s definitely hitting OD.

Maybe the gps wasn’t working. Lol

No.
Maybe Bro is not telling all. May have also added a tooth to top sprocket with his tune.

Your turn to kick it up a notch.

 

[newtron]

He's just getting more shift to a higher ratio in his clutching or less slippage. 5-6 mph is only like .06 different shift ratio at 9000 rpm. (no slippage)

http://www.turboaddictionparts.com/catalog/snowmobilecalculator.html

Makes sense to me

 

[HMTurbo]

Makes sense to me

His larger rear wheels can add some efficiency but most likely not the difference you are seeing.

Don't think of the track as a wheel. Its outside circumference has nothing to do with final drive ratio. That calculation stops at the drivers.

 

[newtron]

His larger rear wheels can add some efficiency but most likely not the difference you are seeing.

Don't think of the track as a wheel. Its outside circumference has nothing to do with final drive ratio. That calculation stops at the drivers.

His was tuned higher than mine at the time so its making sense

So for everyone here, what is the calculated mph fully shifted out with 21/41 gears?

 

[hibshman25]

I would like to see YAM talk about updates....even if they are for 19s....It would be nice to know.

-Belt/clutch updates
-ROV
-Oil tank seal/gasket
-coolant hose shroud
-sight glass problems

Im sure there are other items that people would like to see addressed but these are the ones I seem to see happening most.


In 18, cat/yam added a oil hole to our top gear, there was nothing i ever saw in print about this update. Will YAM update others items finally? And not talk about it? They sure did not change anything with ROV or oil tank seals, or any clutch updates whatsoever.....I think Cat got new clutch updates in 17, so at least it seems cat is looking out for their brand, but YAM has done no updates for belt blowers.

Would be nice to know for guys like me who want to know about updates or fixes. Hard to decide what I want to do when there is no info moving ahead. I dont mind fixing all these issues myself, but would like to know if cat/yam are even considering working on fixes.

Dan

You can bet I will be working on solutions for some of those issues. As usual, I have some unique ideas!

 

[SumpBuster]

You can bet I will be working on solutions for some of those issues. As usual, I have some unique ideas!

Travis, I'd like full gyro control, then there's no need for the rov!!

 

[ROCKERDAN]

His was tuned higher than mine at the time so its making sense

So for everyone here, what is the calculated mph fully shifted out with 21/41 gears?

I think Ive heard gps speeds of 126mph w/stock gears and enough HP.