Quick change sprocket
- Thread starter RODOLFO
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Did you have to machine the flange or any other part to get the fitment/alignment correct?
To do any of these combinations of components correctly, some modifications will probably be necessary. You have the flange, the drive pins and the carrier that mate to create a fit and by fit I’m referring to an assembled unit. Once that’s done,you assemble the flange spacer then the flange then toque to spec. There is no way to alter chain alignment so if it’s off due to mixing components you will need to mod the spacer thickness. You will also, if you want to do it right potentially have to “step” the spacer to maintain the correct clearance between the base of the flange and the base of the carrier so when torqued to spec allows the “Cush” design to do what it is supposed to do. If this clearance is not correct, you will wear a groove in the back of the aluminum flange were it contacts the steel spacer. You want the back of the flange to bottom on the spacer and the carrier to have 1.5mm clearance.
So in my case, yes I put the axle/drive spacer in the lathe and machined it to give me the clearance I wanted for the flange/carrier interface and also to give me perfect chain alignment.
So in my case, yes I put the axle/drive spacer in the lathe and machined it to give me the clearance I wanted for the flange/carrier interface and also to give me perfect chain alignment.
Usually if you stick to one mfg, you should be OK still need to verify alignment. You will notice it quickly on an aluminum sprocket if it’s out. Again adding a shim or reducing the thickness of the rear spacer is the solution if it’s out.
Here is an example of a parts incompatibility. CNC Ti flange, AEM aluminum flange. You can see that the length inserted into the carrier is longer on the AEM than the CNC so with the AEM flange the flange base will seat on the spacer first giving the correct clearance on the carrier. With the CNC flange, the carrier will seat on the spacer first and when torqued, will wear a groove in the aluminum carrier. This setup needs an a step space machined into the face of the spacer to get the correct clearance.
Here is an example of a parts incompatibility. CNC Ti flange, AEM aluminum flange. You can see that the length inserted into the carrier is longer on the AEM than the CNC so with the AEM flange the flange base will seat on the spacer first giving the correct clearance on the carrier. With the CNC flange, the carrier will seat on the spacer first and when torqued, will wear a groove in the aluminum carrier. This setup needs an a step space machined into the face of the spacer to get the correct clearance.
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So no Cush?
I wonder how that affects driveability. I guess it could be a race only setup or do other manufacturers not have a cush equivalent?
Pretty simple setup. I’m wondering how the aluminum drive pins will hold up/wear. The inner sleeve of the Cush drive bumper is steel and that is constantly banging clockwise and counterclockwise on the drive pin. For the street, something I would definitely keep an eye on.
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My setup using AEM parts:
I hadn't seen that carrier/flange setup from Sitta before, looks cool.
I hadn't seen that carrier/flange setup from Sitta before, looks cool.
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Where did you find this for sale?
- Joined
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WRS.it
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