-
down shifting to brake could potentially loosen the bolt holding sprocket then working pulley back and forth
-
Very Active Member
-
Very Active Member
Originally Posted by fatboy
down shifting to brake could potentially loosen the bolt holding sprocket then working pulley back and forth
On a spline shaft!?!?
-
yes mikey not everybody use the trans for a brake
-
Active Member
Is it possible the motor mounts are off just a tiny bit making the pressure on the sprocket a little off to one side and causing undue wear?
Juice
Happy owner of 2014 White RTS - SE6
-
Very Active Member
Originally Posted by fatboy
the only diff in the two sprockets is the white coating
You did a metallurgy test on an old one and a new one, and found them the same?
2018 RT Ltd - Asphalt Metallic - East Valley of Phoenix
2018 RT Ltd Chrome - Champagne Metallic - Lake Stevens, Wa
(Champagne/Hooker) Magic Mirrors, 360 LED head lights, BajaRon sway bar, H&R springs and shock adjusters, dash cam, foam grips, third brake light 4 LED strobe for 7 seconds and then on steady, rear LED turn signals/8 ohm 50W resistors, sequential turn signals on front fenders, Vredestein and PPA Orb wheels on front and General out back, and driver backrest.
Things that move between machines: Ikea sheep skins, Zumo XT GPS, and extra tools. Hooker is going to be my summer trike up North; and Hookie my winter trike down South.
(Asphalt/Hookie) Elka shocks on front - BajaRon sway bar, OEM driver's backrest, LED headlights, dual USB with voltmeter, dash cam, foam grips - Magic Mirrors - front tires Vredestein Quatrac SL on PPA ORB Chrome wheels.
-
Active Member
Originally Posted by fatboy
down shifting to brake could potentially loosen the bolt holding sprocket then working pulley back and forth
I guess maybe. If that is the case it need to be addressed in the engineering department no way their parts should be failing at 5175 miles with mild downshifting.
-
Very Active Member
-
Originally Posted by fatboy
the only diff in the two sprockets is the white coating
The white pulley(updated version) has a slightly different tooth profile to eliminate the whining sound from, believe it or not, air being trapped between cog and belt. The Smoaks You Tube video discusses this……..mines quieter.
-
Very Active Member
Originally Posted by bikerchris1270
The white pulley(updated version) has a slightly different tooth profile to eliminate the whining sound from, believe it or not, air being trapped between cog and belt. The Smoaks You Tube video discusses this……..mines quieter.
But that has little to do with the spline wear on the earlier pulleys. Unless they changed something in the casing material the spline stripping out may still be present. (It is only a different color? I think not!)
2018 RT Ltd - Asphalt Metallic - East Valley of Phoenix
2018 RT Ltd Chrome - Champagne Metallic - Lake Stevens, Wa
(Champagne/Hooker) Magic Mirrors, 360 LED head lights, BajaRon sway bar, H&R springs and shock adjusters, dash cam, foam grips, third brake light 4 LED strobe for 7 seconds and then on steady, rear LED turn signals/8 ohm 50W resistors, sequential turn signals on front fenders, Vredestein and PPA Orb wheels on front and General out back, and driver backrest.
Things that move between machines: Ikea sheep skins, Zumo XT GPS, and extra tools. Hooker is going to be my summer trike up North; and Hookie my winter trike down South.
(Asphalt/Hookie) Elka shocks on front - BajaRon sway bar, OEM driver's backrest, LED headlights, dual USB with voltmeter, dash cam, foam grips - Magic Mirrors - front tires Vredestein Quatrac SL on PPA ORB Chrome wheels.
-
Very Active Member
Originally Posted by fatboy
the only diff in the two sprockets is the white coating
Correct that. The only visible difference is the white coating. My guess is they either changed the steel that is used for them, or the heat treat process after the splines are cut. Or, maybe the supplier did not heat treat the earlier ones correctly, or had a batch not properly heat treated. There may have been no way to know for certain what sprockets were or were not properly heat treated. Maybe the splines are now cut for a tighter fit.
2014 Copper RTS
Tri-Axis bars, CB, BajaRon sway bar & shock adjusters, SpyderPop's Bumpskid, NBV peg brackets, LED headlights and modulator, Wolo trumpet air horns, trailer hitch, custom trailer harness, high mount turn signals, Custom Dynamics brake light, LED turn signal lights on mirrors, LED strip light for a dash light, garage door opener, LED lights in frunk, trunk, and saddlebags, RAM mounts and cradles for tablet (for GPS) and phone (for music), and Smooth Spyder belt tensioner.
-
you do not want the metal in the pulley hardened enough to wear the splines on the crank then you have a big problem believe it or not the spyder knows down shifts that wont hurt its self
-
Very Active Member
-
Very Active Member
Originally Posted by fatboy
you do not want the metal in the pulley hardened enough to wear the splines on the crank then you have a big problem believe it or not the spyder knows down shifts that wont hurt its self
That's the balancing game the designers have to play. The pulley needs to be soft enough to be the sacrificial piece and hard enough not to wear down.
2014 Copper RTS
Tri-Axis bars, CB, BajaRon sway bar & shock adjusters, SpyderPop's Bumpskid, NBV peg brackets, LED headlights and modulator, Wolo trumpet air horns, trailer hitch, custom trailer harness, high mount turn signals, Custom Dynamics brake light, LED turn signal lights on mirrors, LED strip light for a dash light, garage door opener, LED lights in frunk, trunk, and saddlebags, RAM mounts and cradles for tablet (for GPS) and phone (for music), and Smooth Spyder belt tensioner.
-
if the bolt backs of from the torque of using the trans as a brake it does not matter how hard it is
-
Very Active Member
Originally Posted by fatboy
if the bolt backs of from the torque of using the trans as a brake it does not matter how hard it is
Looks like it would do the same thing when it auto downshifted then.
-
the auto downshift is not using the compression of the engine as a brake
-
Very Active Member
Originally Posted by fatboy
if the bolt backs of from the torque of using the trans as a brake it does not matter how hard it is
The only way downshifting will loosen the bolt is for the sprocket to have rotational movement with respect to the shaft. The red dust is the result of fretting. Industrial installations contend with the same issue. The two most common causes of fretting, from what I read, is misalignment of the mating splines, or rotational vibration. In applications where there isn't a flywheel to counteract changes in rotational speed there is a good possibility of rotational vibration. That may be what is causing the Spyder sprockets to wear. Or, maybe the sprocket tooth configuration that was causing the belt whine may have been inducing rotational vibration in the sprocket.
In any case fretting is not subject to an easy solution, and has been the focus of many engineers in industry. It's far to complicated for us mere Spyder riding mortals to solve. I'm an engineer and I had difficulty understanding some of the discussions about spline fretting.
2014 Copper RTS
Tri-Axis bars, CB, BajaRon sway bar & shock adjusters, SpyderPop's Bumpskid, NBV peg brackets, LED headlights and modulator, Wolo trumpet air horns, trailer hitch, custom trailer harness, high mount turn signals, Custom Dynamics brake light, LED turn signal lights on mirrors, LED strip light for a dash light, garage door opener, LED lights in frunk, trunk, and saddlebags, RAM mounts and cradles for tablet (for GPS) and phone (for music), and Smooth Spyder belt tensioner.
-
Very Active Member
-
Very Active Member
Originally Posted by IdahoMtnSpyder
The only way downshifting will loosen the bolt is for the sprocket to have rotational movement with respect to the shaft. The red dust is the result of fretting. Industrial installations contend with the same issue. The two most common causes of fretting, from what I read, is misalignment of the mating splines, or rotational vibration. In applications where there isn't a flywheel to counteract changes in rotational speed there is a good possibility of rotational vibration. That may be what is causing the Spyder sprockets to wear. Or, maybe the sprocket tooth configuration that was causing the belt whine may have been inducing rotational vibration in the sprocket.
In any case fretting is not subject to an easy solution, and has been the focus of many engineers in industry. It's far to complicated for us mere Spyder riding mortals to solve. I'm an engineer and I had difficulty understanding some of the discussions about spline fretting.
Fretting corrosion is not that difficult to contend with. You either redesign the interface of the joint to prevent movement, or you apply a lubricant and accomplish maintenance events to clean and inspect the splines for wear, if no wear is indicated, relubricate the splines and correctly reassemble.
As I have mentioned previously, the pulley is a wear item, same as sprockets with a chain. Can Am should not recall, but rather publish a service bulletin advising the service intervals for inspecting the splines.
-
Very Active Member
Originally Posted by PMK
Fretting corrosion is not that difficult to contend with. You either redesign the interface of the joint to prevent movement, or you apply a lubricant and accomplish maintenance events to clean and inspect the splines for wear, if no wear is indicated, relubricate the splines and correctly reassemble.
As I have mentioned previously, the pulley is a wear item, same as sprockets with a chain. Can Am should not recall, but rather publish a service bulletin advising the service intervals for inspecting the splines.
I just inspected mine and re-lubed it at 10K miles, appear as good as new with lube apparent when I took it apart.
2018 RT Ltd - Asphalt Metallic - East Valley of Phoenix
2018 RT Ltd Chrome - Champagne Metallic - Lake Stevens, Wa
(Champagne/Hooker) Magic Mirrors, 360 LED head lights, BajaRon sway bar, H&R springs and shock adjusters, dash cam, foam grips, third brake light 4 LED strobe for 7 seconds and then on steady, rear LED turn signals/8 ohm 50W resistors, sequential turn signals on front fenders, Vredestein and PPA Orb wheels on front and General out back, and driver backrest.
Things that move between machines: Ikea sheep skins, Zumo XT GPS, and extra tools. Hooker is going to be my summer trike up North; and Hookie my winter trike down South.
(Asphalt/Hookie) Elka shocks on front - BajaRon sway bar, OEM driver's backrest, LED headlights, dual USB with voltmeter, dash cam, foam grips - Magic Mirrors - front tires Vredestein Quatrac SL on PPA ORB Chrome wheels.
-
Active Member
Last edited by Chasinsparks; 05-05-2021 at 07:37 PM.
Reason: Maybe to controversial
-
Very Active Member
The best substitute for brains & knowledge is....................silence.
-
Very Active Member
-
Very Active Member
Originally Posted by fatboy
the auto downshift is not using the compression of the engine as a brake
You need to tell my RTL that, when I am coasting to a red light I sure feel every change and the associated speed decrease.
Posting Permissions
- You may not post new threads
- You may not post replies
- You may not post attachments
- You may not edit your posts
-
Forum Rules
|