big_ry_ry
Expert
I have a 2005 Rs Venture, my shocks in the back are fine when riding alone, when I ride double I find my sled bottoming out. It does not hit hard but enough to want to upgrade. I am a big rider myself, about 320 pounds and then a person in the back is a little to much for some rough trails. I have the settings in the back on hard. Any suggestion? Some one said maybe new springs? Again any suggestions?
you have 2 problems with the venture first the spring invest in the heavy duty one there about a 100 dollars in quebec and i think for you a shock with more damping would be a perfect setting i will had a shock with an ajustable damping that would be fabulous but lets keep dreaming on my venture i put the heavy duty one and i find it limit i weight 170 pnds and my wife 145 went you it slow bump i meen wave on the trail it bottom easy even with the heavy duty but it help a lot
towing
Expert
Hi guys
The rear end bottomming was really an issue on the RsVenture last season, there is many things that has been try.
In my case, i weight 160lbs and my wife 120lbs with gears (we always ride togethers) and it was bottomming really easylly and it was worse as the season goes on.
Yamaha installed me on warranty a set of heavyduty coil springs and with all the setting to the max the situation became acceptable for me
. In your case, it will help but you will have to do more than that...
A warning here for those who want to try a stiffer rear shock, the upper support of this shock is on the weak side... i know one case where this upper support tear from the skid and drive right trough the track jamming and warping the all thing.
a bad job... It happened few weeks after installing the stiffer shock. :ORC This try had been made by the dealer so all the repairs had been covered it may be not always the case...
So, this support and also the support for the rear coil spring end (the one with the 3 position black plastic cam) need to be reinforced on all 2005 RsVenture. In this last case, i know many cases where this support also break. When this happened, the rear end fall down and the end of the coils spring bite througt the track jamming the whole thing :shock: . Some peoples can be injured when those breaking case happen. I will post more in detail if yamaha do nothing for that...
We have a guy here in quebec who developed a bigger rear cam for the coil spring. It seems to work pretty well. His web site is in french but i let the link, you will be at least able to see some picture of it. You will need to reinforce the braket to install this safely...
http://www.starsuspensions.com/cameventure.htm
If you need translation for the french, just ask me...
Bye
Alain
The rear end bottomming was really an issue on the RsVenture last season, there is many things that has been try.
In my case, i weight 160lbs and my wife 120lbs with gears (we always ride togethers) and it was bottomming really easylly and it was worse as the season goes on.
Yamaha installed me on warranty a set of heavyduty coil springs and with all the setting to the max the situation became acceptable for me
. In your case, it will help but you will have to do more than that...A warning here for those who want to try a stiffer rear shock, the upper support of this shock is on the weak side... i know one case where this upper support tear from the skid and drive right trough the track jamming and warping the all thing.
a bad job... It happened few weeks after installing the stiffer shock. :ORC This try had been made by the dealer so all the repairs had been covered it may be not always the case...So, this support and also the support for the rear coil spring end (the one with the 3 position black plastic cam) need to be reinforced on all 2005 RsVenture. In this last case, i know many cases where this support also break. When this happened, the rear end fall down and the end of the coils spring bite througt the track jamming the whole thing :shock: . Some peoples can be injured when those breaking case happen. I will post more in detail if yamaha do nothing for that...
We have a guy here in quebec who developed a bigger rear cam for the coil spring. It seems to work pretty well. His web site is in french but i let the link, you will be at least able to see some picture of it. You will need to reinforce the braket to install this safely...
http://www.starsuspensions.com/cameventure.htm
If you need translation for the french, just ask me...
Bye
Alain
Jack_Shaft
TY 4 Stroke Junkie
Alain,
Although the larger cam will make the springs resistance go up, it's not really designed to work in that range. Overstressing the spring like that will cause the spring to fail more quickly. With that said, if the spring is designed to last for 3000hrs at 50% load, it would probably last for 1500hrs at 100% load... in which case it would not bother us.
Now, if the spring is designed to last for 200hrs at 50% load, then we load it to 100% and it decides to last for only 100hrs, that could be a concern...
Although the mod may work very well, the real solution would be to design/buy a different spring.
Although the larger cam will make the springs resistance go up, it's not really designed to work in that range. Overstressing the spring like that will cause the spring to fail more quickly. With that said, if the spring is designed to last for 3000hrs at 50% load, it would probably last for 1500hrs at 100% load... in which case it would not bother us.
Now, if the spring is designed to last for 200hrs at 50% load, then we load it to 100% and it decides to last for only 100hrs, that could be a concern...
Although the mod may work very well, the real solution would be to design/buy a different spring.
towing
Expert
Yes Jack_Shaft, it is a possibility that these cams overstress the springs. At this moment, i have no feed back of someone who have long term test with these cams...
The base of the problem with the bottoming on the Rsventure is the rear end height. With me and my wife on the sled(less than 300lbs), the distance between the spring coil and the rubber bump on the skid was around 4" on a total skid travel of around 8---8.5", too low. I have now with the cargo ones around 4.5---5". We should have a minimum of 5---5.5" to give a decent rear skid travel and it is the spring job to do this...
Is the real solution is to put stiffer spring that will raise the rear but will be stiffer in the whole rear travel (rigidity curve) Or modify the starting point with biggers cams because it was badly desingned at first ???? I don't know the answer by now...
I eared that the Rsventure TF springs were stiffer than the standart version, maybe it is the way to go or check a what they install on the 2006 sled
Alain
The base of the problem with the bottoming on the Rsventure is the rear end height. With me and my wife on the sled(less than 300lbs), the distance between the spring coil and the rubber bump on the skid was around 4" on a total skid travel of around 8---8.5", too low. I have now with the cargo ones around 4.5---5". We should have a minimum of 5---5.5" to give a decent rear skid travel and it is the spring job to do this...
Is the real solution is to put stiffer spring that will raise the rear but will be stiffer in the whole rear travel (rigidity curve) Or modify the starting point with biggers cams because it was badly desingned at first ???? I don't know the answer by now...
I eared that the Rsventure TF springs were stiffer than the standart version, maybe it is the way to go or check a what they install on the 2006 sled
Alain
Jack_Shaft
TY 4 Stroke Junkie
TF springs are stiffer, but they're wayyy shorter 
I already went towards that route, won't work. Since the RS Venture 144" has one big long skidframe, the rear torque arm is mounted a fair distance back on the rail. The RS Venture TF has a two piece skidframe so the rear scissors is almost at the same position as a 121-136" sled, just with a rear flip-up section attached.
I agree with you that the RS Venture sits too low when riding two-up. I wish there was an easy way to have the thing start out with more travel... perhaps longer stroking rear scissors? Could work.
I already went towards that route, won't work. Since the RS Venture 144" has one big long skidframe, the rear torque arm is mounted a fair distance back on the rail. The RS Venture TF has a two piece skidframe so the rear scissors is almost at the same position as a 121-136" sled, just with a rear flip-up section attached.
I agree with you that the RS Venture sits too low when riding two-up. I wish there was an easy way to have the thing start out with more travel... perhaps longer stroking rear scissors? Could work.
towing
Expert
Good to know Jackshaft,
We will forget the TF springs.. :ORC
Aventure in an other post remind me about an inexpensive trick with PVC tube that someone try with succes last season. I don't remember to had seen info on that here but we had a post on that on the CMIQ french forum.
The coil of the spring have an inner diameter of around 2.25" and sit on an around 1.25" shaft. A wise guy put some short lenght of pvc tube between the shaft and the coil to fill the gap and at the same time modify the angle of the spring tips that make the same effect as a bigger cam. If i remember right, he was putting two short lengh(the width of the coil) of tube with different diameter inside each other (1.5" and 2" by example) on each coils.
Some sceptics can allow that it will limit the travel because it will lower the coil of the spring by the thickness of tube you put and it is precisely the coils that limit the fully compress skid when they hit the rubber bumps of the rails, and it is true. But in fact, it will raise the skid way more than the thickness of tube you put so it work great
I don't have the exacts diameter he use but what is important is that the the tube you use don't get skeeze in the coil (as it will get smaller) when the skid is fullly compress. If this happen, it is dangerous that the springs tips bent and ruin what you are trying to do.....
I had forgot this trick, it is by far the most inexpensive thing it can be done to improve rear suspention, less than 2$. I think i will try it
Alain
We will forget the TF springs.. :ORC
Aventure in an other post remind me about an inexpensive trick with PVC tube that someone try with succes last season. I don't remember to had seen info on that here but we had a post on that on the CMIQ french forum.
The coil of the spring have an inner diameter of around 2.25" and sit on an around 1.25" shaft. A wise guy put some short lenght of pvc tube between the shaft and the coil to fill the gap and at the same time modify the angle of the spring tips that make the same effect as a bigger cam. If i remember right, he was putting two short lengh(the width of the coil) of tube with different diameter inside each other (1.5" and 2" by example) on each coils.
Some sceptics can allow that it will limit the travel because it will lower the coil of the spring by the thickness of tube you put and it is precisely the coils that limit the fully compress skid when they hit the rubber bumps of the rails, and it is true. But in fact, it will raise the skid way more than the thickness of tube you put so it work great
I don't have the exacts diameter he use but what is important is that the the tube you use don't get skeeze in the coil (as it will get smaller) when the skid is fullly compress. If this happen, it is dangerous that the springs tips bent and ruin what you are trying to do.....
I had forgot this trick, it is by far the most inexpensive thing it can be done to improve rear suspention, less than 2$. I think i will try it
Alain
big_ry_ry
Expert
shocks
Thanks for the information, I agree that the shocks were great in the beginning, after about 300 miles they really started to loosen up. I dont want this to get even worse this winter. I fiqure i have untill december to get the shcoks ready (trails open after deer hunting) so i want this to be a nice ride.. It seems that maybe stiffer springs may be the way to go...Any suggestions on brand.. This is my first new sled so i really want to take care of it.. A lot better than my 1976 john deere...I will also check with my dealer, I would rather pay a little more to have them install it and be warranted through them. This was a concern when i bought the sled, i know i am a big guy, when i bought it i had them check into a heavier spring but they said noting was availble at that time. So maybe things have changed....Thanks everyone for the infomation, it is greatly appreacited..
Thanks for the information, I agree that the shocks were great in the beginning, after about 300 miles they really started to loosen up. I dont want this to get even worse this winter. I fiqure i have untill december to get the shcoks ready (trails open after deer hunting) so i want this to be a nice ride.. It seems that maybe stiffer springs may be the way to go...Any suggestions on brand.. This is my first new sled so i really want to take care of it.. A lot better than my 1976 john deere...I will also check with my dealer, I would rather pay a little more to have them install it and be warranted through them. This was a concern when i bought the sled, i know i am a big guy, when i bought it i had them check into a heavier spring but they said noting was availble at that time. So maybe things have changed....Thanks everyone for the infomation, it is greatly appreacited..
