cush drive?

[timwilky]

Not on mine, the Bros mille. done 5000 miles, but the sprocket can move a couple of mill within the wheel, clunking.

To me this is indicative a goosed cush drive. What is the org opinion.

I have told him to ask on a prillia forum

[punyXpress]

Ask Gr33K - it may be the same as a Falco

[Dangerous Dave]

Check to see if the rear axle is done up to the specified torque and as you know check the cush drive rubbers.

[kwak zzr]

you'll get abit of play but it shouldnt be much, 5000 miles dont seem much.

[ThEGr33k]

Your right Dave. Its the same setup as mine.

That does sound a little odd! My rubbers were very solid when I stripped my wheel to change the sprocket. And 5K miles... WTF! Can you move it with your hand? Got pic? Do you mean in and out movement or back and forward? if its in and out then thats what danger dave said. The drive is only held in with the wheel axel and bolt.

Cheers.

Oh and best Prilia forum imo http://www.apriliaforum.com/forums/

Cheers,

Nick

[timwilky]

The movement is radial.

He is a mechanical numpty. I hate to admit he is my brother in that respect.

He had to be recovered at the weekend off the motorway with a flat rear. He said he could not find any puncture, took the wheel off and dumped it in water looking for air leaks. Non found so he put the wheel on, rode up to my house for me to torque up.


He told me to use 95Nm. Which I personally think to be a tad on the low side.

I might just nip down to his place at the weekend and pull the wheel off to check if he has installed it correctly.

[ThEGr33k]

The movement is radial.

He is a mechanical numpty. I hate to admit he is my brother in that respect.

He had to be recovered at the weekend off the motorway with a flat rear. He said he could not find any puncture, took the wheel off and dumped it in water looking for air leaks. Non found so he put the wheel on, rode up to my house for me to torque up.


He told me to use 95Nm. Which I personally think to be a tad on the low side.

I might just nip down to his place at the weekend and pull the wheel off to check if he has installed it correctly.

I thin that would be a good idea. I honestly cant think of anything that could cause that from my inspection. Unless he has taken something out :S

http://apriliayorkshire.co.uk/pictures/82874952.gif

As you can see its fairly fool proof design.

Good luck with the issue! :cool:

[jimmy__riddle]

radial movement is usually just a worn cush drive, but i dont think it should be worn after 5k! but i guess it depends on the state of the rest of the drive train, loose chain etc.

[timwilky]

I take it part 6 above are rubber bushes that sit over the sprocket pillar bolt heads and into the cush rubbers. The sort of movement he is experiencing would be indicative of these either failing or missing.

When I tried to explain the sprocket/carrier would simply lift out of the wheel he expressed surprise. I therefore assume he had not even tried to remove it whilst the wheel was off. Like I said he is a mechanical numpty.

[ThEGr33k]

LOL.

Yes you are right and its a real git to pull it out... hence he wouldnt know unless he tried. Well unless the rubbers are missing or damaged. But then it would probably just fall out. I hope he isnt meaning movement asin from chain stretch I.E. the wheel moves without moving engine. From what you say you cant be sure.


Please share the findings. Will be interesting to know what you find! :D


Out of interest what model is it? (year etc).

I take it part 6 above are rubber bushes that sit over the sprocket pillar bolt heads and into the cush rubbers. The sort of movement he is experiencing would be indicative of these either failing or missing.

When I tried to explain the sprocket/carrier would simply lift out of the wheel he expressed surprise. I therefore assume he had not even tried to remove it whilst the wheel was off. Like I said he is a mechanical numpty.

[timwilky]

It is a 2003 RSV, one previous owner the local firearms team sergeant. Bike is very clean, looks to be original chain/sprocket and little stretch.

This is radial movement of the sprocket/carrier relative to the wheel. IE, I can get hold of the sprocket with the bike neutral and turn it a few degrees. There does not appear to be any lateral (cannot shake it back/forth) movement.

[ThEGr33k]

Hmph indeed it is odd. Well let me know the finding aye. :D

is it the RSV-R? Those are the nicest RSV's made, the 2003 R. :D Radial brakes and the lot Yum. :D

It is a 2003 RSV, one previous owner the local firearms team sergeant. Bike is very clean, looks to be original chain/sprocket and little stretch.

This is radial movement of the sprocket/carrier relative to the wheel. IE, I can get hold of the sprocket with the bike neutral and turn it a few degrees. There does not appear to be any lateral (cannot shake it back/forth) movement.

[jimmy__riddle]

This is radial movement of the sprocket/carrier relative to the wheel. IE, I can get hold of the sprocket with the bike neutral and turn it a few degrees. There does not appear to be any lateral (cannot shake it back/forth) movement.


that definately sounds like the rubber is worn

[punyXpress]

Riding in too high a gear would also beat the living $hit out of them - or lifting the front too much.
Is it on its second, third, fourth rear tyre? :confused:

[Dangerous Dave]

Ah... that explains it, old bike low mileage and don't forget rubber perishes. Check the cush drive rubbers, I am sure (without looking at it myself) that these will need replacing.

[ThEGr33k]

Ah... that explains it, old bike low mileage and don't forget rubber perishes. Check the cush drive rubbers, I am sure (without looking at it myself) that these will need replacing.


Still though mine hasnt... and it might only just be 5 years old. Still though you are probably right.

[timwilky]

Ok feedback from the brother.

I had managed to find somebody who sells the rubbers for £0.89 each (apriliaspares.com) so mail ordered 5.

In the mean time he has removed the rear wheel. It turns out all the bolts holding the sprocket on are only nipped up. as in the sprocket is turning slightly. What ever numpty fitted this sprocket has obviously never heard of a torque wrench.

[ThEGr33k]

Ok feedback from the brother.

I had managed to find somebody who sells the rubbers for £0.89 each (apriliaspares.com) so mail ordered 5.

In the mean time he has removed the rear wheel. It turns out all the bolts holding the sprocket on are only nipped up. as in the sprocket is turning slightly. What ever numpty fitted this sprocket has obviously never heard of a torque wrench.

Or some strength in the arm... :rolleyes:

I didnt think it would be the rubbers tbh, mine are in top shape. Glad you have found the issue! :D

[timwilky]

right to finish off this thread.

The brother has just brought up his wheel. the problem was

http://www.twsoft.co.uk/sv/cush.png

The bolts that hold the cush drive carrier (1) were loose. The carrier was transmitting the drive through the locating pin (3). I guess all the heavy throttle/ engine brake etc has then elongated the locating hole within the carrier (2).

So it is about £100 for a new carrier. We are trying to get away with new cush rubbers (£5 for a set of 5) and properly thread lock and torquing the carrier to the wheel. If it is heavy throttle action that loosened it, time will tell and a new carrier will be required.

2 of the 5 pins that hold the sprocket and locate into the cush drive were also loose.

Now I wonder, was it Aprilia who did this out of the factory? an enthusiastic amatuer mechanic? or the local dealer?

Whatever, whoever, it is too late. But from Aprilia forums it appeas to be a common problem

[ThEGr33k]

right to finish off this thread.

The brother has just brought up his wheel. the problem was

http://www.twsoft.co.uk/sv/cush.png

The bolts that hold the cush drive carrier (1) were loose. The carrier was transmitting the drive through the locating pin (3). I guess all the heavy throttle/ engine brake etc has then elongated the locating hole within the carrier (2).

So it is about £100 for a new carrier. We are trying to get away with new cush rubbers (£5 for a set of 5) and properly thread lock and torquing the carrier to the wheel. If it is heavy throttle action that loosened it, time will tell and a new carrier will be required.

2 of the 5 pins that hold the sprocket and locate into the cush drive were also loose.

Now I wonder, was it Aprilia who did this out of the factory? an enthusiastic amatuer mechanic? or the local dealer?

Whatever, whoever, it is too late. But from Aprilia forums it appeas to be a common problem

Ouch! Think I may check mine then! Cheers. :D

[punyXpress]

Ouch! Think I may check mine then! Cheers. :D
Surely not a smidgen of doubt entering the invincible Falco equation?? :confused:

[ThEGr33k]

Surely not a smidgen of doubt entering the invincible Falco equation?? :confused:

No... No movement. I figured though that if some numpty had put it together wrong :(

My bike has just passed the 18K mile mark. :cool: