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Let the mods commense

445 Views 23 Replies 5 Participants Last post by  DIVINECHAOS1991
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Well, with the fuel &ignition programmer, she gets warm. So rad relocate and snorkles. I'll figure out how to mount the windscreen to it. Clutch spring and shimmed already.
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dont need a windsheild where u going now lol. nice bike.
dont need a windsheild where u going now lol. nice bike.
Thx. Lol, winter plowing.
Well. Rad relocate and snorkles almost done. Clutch mods done. Belt squeeks now. Lol. Will need rear shocks. Front CV broke (both joints) taking out the seal and bearing... Ugh. And I need to adjust valves.
Belt squeal means that something is wrong with your clutch mods. Could be flopped roller weights. Too many shims if you added shims. Belts worn out of spec.
Dirty Secondary stuck open slightly.
Belt squeal means that something is wrong with your clutch mods. Could be flopped roller weights. Too many shims if you added shims. Belts worn out of spec.
Dirty Secondary stuck open slightly.
Nooo, not squeeks. At slow speeds I can hear the rubber of the belt squeeking as it rotateson the primary. It's not belt slip. Have 1.7 shim. Clutches work. I ran them through the range all works as it should. Belt is brand new.
Clarification does help. I thought squeal was spelled wrong. As the belt breaks in (seats) the squeak will stop.
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Clarification does help. I thought squeal was spelled wrong. As the belt breaks in (seats) the squeak will stop.
Oh, it stopped alright.. belt came apart on me... That was fun to push/winch it a half mile through the woods to the bike trail... Old belt was in good shape yet. Also got some good shoes.
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Well rebuilt my front diff. Bearings and seals. And put one of the canam sealed vents on it. I think that's why I kept breaking front outer cvs. Bad bearings. All the right side. I broke the left getting it out of the woods... So for now it's rear wheel drive. But new tires/rims. 30x11r14 on canam rims. They don't hook and wheelie like those 28” swamp lites. Their a harder compound, so they shouldn't hook. Oddly I've only broken front cvs.... And I have a spare front diff to rebuild.. I took out the locker awhile back.
Definitely something wrong with your clutch if you broke a brand new belt and it was squealing.
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Definitely something wrong with your clutch if you broke a brand new belt and it was squealing.
It wasn't a squeel. Like walking in a freshly polished floor, movement of the rubber squeeks.it was when I was off the throttle and rolling slow. Also it was a $30 belt. The other one didn't do it. Belt had no hot spots or excessive wear. Their was chunks that came off. Ribbed section delaminated then it sucked the threading into the primary. And I could peel the belt apart, can see it in the photo. Just inferior and too cheap. Clutch didn't sound different after the mods. I'll get a better one next time.
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Also it was a $30 belt.
I can't really follow what's going on, but as for a $30.00 belt? You really do get what you pay for.
It wasn't a squeel. Like walking in a freshly polished floor, movement of the rubber squeeks.it was when I was off the throttle and rolling slow. Also it was a $30 belt. The other one didn't do it. Belt had no hot spots or excessive wear. Their was chunks that came off. Ribbed section delaminated then it sucked the threading into the primary. And I could peel the belt apart, can see it in the photo. Just inferior and too cheap. Clutch didn't sound different after the mods. I'll get a better one next time.
For years many members here warned to use only O.E.M. Yamaha belts, this hasn't been talked about much in recent months.
The squishy sound you heard is normal due to the clamping force of the secondary pulley on the belt which holds the primary together.
Years ago I tried Dayco belts before I learned better, I think I got @ 230ish miles on the first one which Dayco replaced at their total expense. The second belt didn't last much longer.
The belt goes through a lot of stress causing rolling and in the following video you can hear the belt when the pulley is turned by hand, this is with a purple spring installed.
For years many members here warned to use only O.E.M. Yamaha belts, this hasn't been talked about much in recent months.
The squishy sound you heard is normal due to the clamping force of the secondary pulley on the belt which holds the primary together.
Years ago I tried Dayco belts before I learned better, I think I got @ 230ish miles on the first one which Dayco replaced at their total expense. The second belt didn't last much longer.
The belt goes through a lot of stress causing rolling and in the following video you can hear the belt when the pulley is turned by hand, this is with a purple spring installed.
Yeah that's the sound I'd hear. Probably 2 tanks on the belt. But we have a lot of clay mud here. And this happended after a really soupy hole
I can't really follow what's going on, but as for a $30.00 belt? You really do get what you pay for.
ADHD thoughts. Lol. Sorry.
Yeah that's the sound I'd hear. Probably 2 tanks on the belt. But we have a lot of clay mud here. And this happended after a really soupy hole
As the belt is shredded in one place I suspect the secondary spring is toooo weak and the primary pulley spun on the belt at that spot.
What's your pulley ratio?
As the belt is shredded in one place I suspect the secondary spring is toooo weak and the primary pulley spun on the belt at that spot.
What's your pulley ratio?
I'll have to check when I get home. But I have the 1.7 worth of shim. Well I'm sure I did that. Because the clutches were Jammed. I rolled it enough to release. Then powered out of the hole, I was hearing the belt come apart.
I'll have to check when I get home. But I have the 1.7 worth of shim. Well I'm sure I did that. Because the clutches were Jammed. I rolled it enough to release. Then powered out of the hole, I was hearing the belt come apart.
With shim alone you're going down the right path, but you're still in the kiddy pool if you want to play in the clay :)
As you increase the c.v.t. shim equivalents to magnify the engine torque produced at the primary pulley for increased pull on the belt you're going to need changes to other parts of the drive line.
I use a purple spring with a 3.54 ratio because in my area we have adobe mud and sharp rock which create great amounts of traction to the tire patch, so between the primary pulley and the tire patch something needs to slip just before an axle breaks or the final drive in the transmission breaks. I use stock axles to protect the transmission.
If you want to know/understand your system and the changes created by different c.v.t. mods I suggest going back to stock (removing the shim) and determine the stock pulley ratio, then after you add c.v.t. mods you can calculate the percentage of change in the pulley ratio to understand the gain in torque to the belt which then requires other mods such as a stiffer secondary, maybe required by taller tires.
All a.t.v. models have system limits so the trick is to know when to get off the gas and use the winch.
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With shim alone you're going down the right path, but you're still in the kiddy pool if you want to play in the clay :)
As you increase the c.v.t. shim equivalents to magnify the engine torque produced at the primary pulley for increased pull on the belt you're going to need changes to other parts of the drive line.
I use a purple spring with a 3.54 ratio because in my area we have adobe mud and sharp rock which create great amounts of traction to the tire patch, so between the primary pulley and the tire patch something needs to slip just before an axle breaks or the final drive in the transmission breaks. I use stock axles to protect the transmission.
If you want to know/understand your system and the changes created by different c.v.t. mods I suggest going back to stock (removing the shim) and determine the stock pulley ratio, then after you add c.v.t. mods you can calculate the percentage of change in the pulley ratio to understand the gain in torque to the belt which then requires other mods such as a stiffer secondary, maybe required by taller tires.
All a.t.v. models have system limits so the trick is to know when to get off the gas and use the winch.
And now I'm running 30x10 14. I can feel the extra weight. Deff need to change the clutch up again. Im running cryptids. They are a hard tire so they don't "bite" as hard but they have more traction. The swamp lites wear fast. And I got a good deal on these. I can feel the clutch slip some. I do believe my last belt was due to not enough airflow so the belt got too hot.
And now I'm running 30x10 14. I can feel the extra weight. Deff need to change the clutch up again. Im running cryptids. They are a hard tire so they don't "bite" as hard but they have more traction. The swamp lites wear fast. And I got a good deal on these. I can feel the clutch slip some. I do believe my last belt was due to not enough airflow so the belt got too hot.
Its not the tire weight that causes the drag, its the longer tire circumference.
Yes air flow is important for cooling.
The deal is: the surface of the belt to the primary pulley is like a clutch plate to a flywheel. When adding taller tires to a truck a stock clutch spring may not be strong enough to prevent mating surface slipping. Have you ever heard a 'truck mudder' complain his tall tires are toooo heavy? They just change the gear ratio and go on, which is like what we do by changing the pulley ratio.
I added taller tires to my 660, raised the pulley ratio, can added a bunch of extra gear (weight) to the 660 and still outrun other stock bikes on stock tires, and I don't have any internal engine mods.
https://flic.kr/p/fSRxHz As for your old belt, if that was from heat the belt would have been frayed around the total length by the heat weakening the entire belt as the belt turned. I think your secondary was stopped and the primary remained turning.
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