Heres my thoughts on the belt drive.

[tukernater]

really,, wouldnt u want your track loose and your limiter tight to keep ski's planted?

yep limiter straps tight and track not very lose it starts to whip under there.Like a wave . Went from 127 to 130.7mph just by tightening track

 

[tukernater]

I've noticed a slight performance increase from a tighter track. The track starts a wave effect on the top side in the tunnel which I feel is robbing power. Just my thought.


Sent from my iPhone using Tapatalk -

Haha just read this

 

[tukernater]

Here
V8 2-Stroke Engine With Electronic Fuel Injection!

 

[POWDERSLUT]

is there vids of this "wave" ? are they takin with the sled on a stand or on snow?

 

[oler1234]

is there vids of this "wave" ? are they takin with the sled on a stand or on snow?

Watch your our buddies when they pull a nice tail stander... You will see it just below the drivers. OR just after the track rounds the back of the rear suspension.

 

[fredw]

I am not able to run my c3 belt drive loose... Running it fairly tight or belt will jump top 27t pulley, been a real issue to overcome but only fix we found is enought tension to prevent jump... Where chain would be much less tension to do the same job, but with much more rotating force that does not work good for spool

As for the track we also have tested that tracks that are to loose do the wave and you actually loose track speed over a higher tension track... Found lots of gains in big drivers and and big wheels over stock stuff

I see there is lots of personal attacks here on lefty...lol last night the mod said no more for someone else... Lets be fair here... He has a good point

same theory as track tension,i run mine as loose as possible with out skippin,looser the track the more power u get to the snow.

 

[tukernater]

Watch your our buddies when they pull a nice tail stander... You will see it just below the drivers. OR just after the track rounds the back of the rear suspension.

Yep That belt is being pushed and pull .

 

[POWDERSLUT]

I am not able to run my c3 belt drive loose... Running it fairly tight or belt will jump top 27t pulley, been a real issue to overcome but only fix we found is enought tension to prevent jump... Where chain would be much less tension to do the same job, but with much more rotating force that does not work good for spool

As for the track we also have tested that tracks that are to loose do the wave and you actually loose track speed over a higher tension track... Found lots of gains in big drivers and and big wheels over stock stuff

I see there is lots of personal attacks here on lefty...lol last night the mod said no more for someone else... Lets be fair here... He has a good point

What about a idler bar or wheel to hold the belt on the top pulley? U can tighten the belt so hard it'll rob lotsa power. Are sleds are two different animals..house cat vs loin..lol. I have run mine so tight that i could actually feel it robbing power,felt like i had my e brake on,,soon after i had the upper bearing seize,heating up the jackshaft so hot that it stripped all the teeth on the aluminum locking collor. i have seen that wave in a wheelie ,but i think that has more to do with letting off the throttle not flapping when the throttle is pinned ..

this is the best vid i can think of that would show any wave.

 

[snopro]

What about a idler bar or wheel to hold the belt on the top pulley? U can tighten the belt so hard it'll rob lotsa power. Are sleds are two different animals..house cat vs loin..lol. I have run mine so tight that i could actually feel it robbing power,felt like i had my e brake on,,soon after i had the upper bearing seize,heating up the jackshaft so hot that it stripped all the teeth on the aluminum locking collor. i have seen that wave in a wheelie ,but i think that has more to do with letting off the throttle not flapping when the throttle is pinned ..

this is the best vid i can think of that would show any wave.
Cory Micku from Slednecks 14 - YouTube

Thanks PS! God I love watching that kid ride! Known him since he was just a knee high. HaHa

 

[POWDERSLUT]

Thanks PS! God I love watching that kid ride! Known him since he was just a knee high. HaHa

that vid would show the wave n i'm not seein it...but hes on it not burpin it

 

[Clode]

This is what an overly loose track does....it gets much worse at high speeds



750hp snowmobile - YouTube

 

[snopro]

This is what an overly loose track does....it gets much worse at high speeds



750hp snowmobile - YouTube

Mr. Rebac's nito methane creation.

 

[Clode]

Mr. Rebac's nito methane creation.

that thing was nuts

 

[snopro]

that thing was nuts

Yeah he choppered it in to the Big Iron Shootout one year. Never did anything with it as they were having problems getting it to run in the cooler temps. Impressive none the less. Lol

 

[teeroy]

Yeah he choppered it in to the Big Iron Shootout one year. Never did anything with it as they were having problems getting it to run in the cooler temps. Impressive none the less. Lol

that vid where he crashed it, he said the fumes from the nitro methane exhaust blinded him....couldn't see or breathe and never saw that dip coming. figured he was doing around 70 mph uphill

 

[Longhairfreak]

This is what an overly loose track does....it gets much worse at high speeds



750hp snowmobile - YouTube

Look at the attack angle on that thing.

 

[snopro]

Look at the attack angle on that thing.

Oh we knew that would give you a woody Kev. HaHa

 

[Great Pumpkin]

Had a 04 king cat with linderman 999 in it. Sled was run one winter with stock drive train. Then had cmx drive installed. This is how it changed. Initial rpm and accelleration did improve. Once wound out top rpm and speed did drop. A simple tightening up of secondary to force back shift solved this issue. Secondary is torque sensing. Didn't want to back shift as fast once belt drive installed. Have helped two guys with c3 belt drives this winter. One on a 925 cat and other 800 cat. Both sleds acted same way. Good get up and go. Drop off once wound out. Increased back shift on both. Problem solved. First thing noticed on all these sleds when finished. Was track would turn when pulling across garage floor. They all dragged before belt drives were installed. As for the adjusting once warm. Any moving object has friction. Friction is heat. Kevlar belts do have a habbit of shrinking when warmed up. Metal does expand. Lets remember that all belt drives sit by the exhaust. All though not huge amounts of heat they do pick up heat from the exhaust. I'm not saying that they are the answer to perfect power delivery. Just what has been seen. As for running loose tracks. Yes they can rob power. Once they start balloning or wave effecting. There is more bends developing in track. The more bend there is in anything rotating the more power it takes to turn. This is why when doing gears. You use the biggest top gear you can for the desired gear ratio. You end up with less bend in chain/belt at slack adjuster. Thus easier to turn.

 

[007sevens]

Had a 04 king cat with linderman 999 in it. Sled was run one winter with stock drive train. Then had cmx drive installed. This is how it changed. Initial rpm and accelleration did improve. Once wound out top rpm and speed did drop. A simple tightening up of secondary to force back shift solved this issue. Secondary is torque sensing. Didn't want to back shift as fast once belt drive installed. Have helped two guys with c3 belt drives this winter. One on a 925 cat and other 800 cat. Both sleds acted same way. Good get up and go. Drop off once wound out. Increased back shift on both. Problem solved. First thing noticed on all these sleds when finished. Was track would turn when pulling across garage floor. They all dragged before belt drives were installed. As for the adjusting once warm. Any moving object has friction. Friction is heat. Kevlar belts do have a habbit of shrinking when warmed up. Metal does expand. Lets remember that all belt drives sit by the exhaust. All though not huge amounts of heat they do pick up heat from the exhaust. I'm not saying that they are the answer to perfect power delivery. Just what has been seen. As for running loose tracks. Yes they can rob power. Once they start balloning or wave effecting. There is more bends developing in track. The more bend there is in anything rotating the more power it takes to turn. This is why when doing gears. You use the biggest top gear you can for the desired gear ratio. You end up with less bend in chain/belt at slack adjuster. Thus easier to turn.

I agree the sled rolls a lot easier. I unload of the deck by backing up till i can lift the front end and push it down the ramp. it will roll right off the ramp and about three - four feet away on hard pack. I also had some clutching problems and am installing a tighter spring to help the problems.

 

[maxwell]

Had a 04 king cat with linderman 999 in it. Sled was run one winter with stock drive train. Then had cmx drive installed. This is how it changed. Initial rpm and accelleration did improve. Once wound out top rpm and speed did drop. A simple tightening up of secondary to force back shift solved this issue. Secondary is torque sensing. Didn't want to back shift as fast once belt drive installed. Have helped two guys with c3 belt drives this winter. One on a 925 cat and other 800 cat. Both sleds acted same way. Good get up and go. Drop off once wound out. Increased back shift on both. Problem solved. First thing noticed on all these sleds when finished. Was track would turn when pulling across garage floor. They all dragged before belt drives were installed. As for the adjusting once warm. Any moving object has friction. Friction is heat. Kevlar belts do have a habbit of shrinking when warmed up. Metal does expand. Lets remember that all belt drives sit by the exhaust. All though not huge amounts of heat they do pick up heat from the exhaust. I'm not saying that they are the answer to perfect power delivery. Just what has been seen. As for running loose tracks. Yes they can rob power. Once they start balloning or wave effecting. There is more bends developing in track. The more bend there is in anything rotating the more power it takes to turn. This is why when doing gears. You use the biggest top gear you can for the desired gear ratio. You end up with less bend in chain/belt at slack adjuster. Thus easier to turn.

except a lubricated chain drive. aluminum is the best dissipating material for heat. so having aluminum housing thats usually covered in snow allows that fluid and chain to always be cold. you can drain the fluid on an XM after riding the piss out of it and the fluid and chain will still be cold. i dont know what this means but i figured id mention it LOL