Chain Case Upgrade to 2017 or newer -- warning

[Mills]

If you are upgrading your chain case to a 2017 or new inner case and bearing, you will also have to get the (11) torx-drive screws that secure the inner case to the chassis. Previous years used an M6 x 1.0 x 20 button head cap screw. The 2017 and newer cases use an M6 x 2.0 x 24 self tapping button head cap screw. It is the same as used to secure the oil tank to the outer chain case cover.
You can try to source the screw outside of Yamaha but good luck finding them anywhere. Even Fastenal, McMaster-Carr and Grainger are telling me they cannot get them.

 

[cannondale27]

If you are upgrading your chain case to a 2017 or new inner case and bearing, you will also have to get the (11) torx-drive screws that secure the inner case to the chassis. Previous years used an M6 x 1.0 x 20 button head cap screw. The 2017 and newer cases use an M6 x 2.0 x 24 self tapping button head cap screw. It is the same as used to secure the oil tank to the outer chain case cover.
You can try to source the screw outside of Yamaha but good luck finding them anywhere. Even Fastenal, McMaster-Carr and Grainger are telling me they cannot get them.

Cool thanks! Wonder why they did that? Stronger case maybe?

 

[Mills]

Since the M6 x 2.0 x 24 bolts are the same as those used to secure the oil tank to the outer case so they could eliminate the old one and take advantage of a higher volume and thus lower cost for the newer screw. Also, they are self tapping so no more time, equipment, people needed to tap the holes in the inner case. I am a product designer by trade and would also do this to make the same product but make it cheaper with a higher profit margin.

 

[cannondale27]

Since the M6 x 2.0 x 24 bolts are the same as those used to secure the oil tank to the outer case so they could eliminate the old one and take advantage of a higher volume and thus lower cost for the newer screw. Also, they are self tapping so no more time, equipment, people needed to tap the holes in the inner case. I am a product designer by trade and would also do this to make the same product but make it cheaper with a higher profit margin.

But is it the same? No. Could a guy just drill case to reuse old bolts?

 

[cannondale27]

I like the flange nut spreading the load. They come loose so is some forces there

 

[Mills]

But is it the same? No. Could a guy just drill case to reuse old bolts?

The old bolts/threads are fine thread and both the old and new a M6 diameter so I don't see how you could tap the newer course 2.0 thread and make it the older fine 1.0 thread. Either you are going to have to get the bolts that came with the case you buy or order part number 8JP-RA283-00-00 from Yamaha to get the bolts needed to secure 2017+ inner case to your older chassis.

 

[Mills]

I like the flange nut spreading the load. They come loose so is some forces there

The bolts I am talking about are those that thread directly into the case. I believe you are talking about those that go through the case and have a nylok nut to secure them.
Look up the "Track Drive 2" schematic for a 2017 'Winder or Viper. The screw I am talking about is Item #38.

 

[cannondale27]

The bolts I am talking about are those that thread directly into the case. I believe you are talking about those that go through the case and have a nylok nut to secure them.
Look up the "Track Drive 2" schematic for a 2017 'Winder or Viper. The screw I am talking about is Item #38.

Oh ok Got ya. Thanks

 

[STAIN]

I would just tap the case and replace those cheap-#*$&@ bolts with real ones. I did that on my 14 Viper when I changed that inner case.

 

[cannondale27]

I would just tap the case and replace those cheap-#*$&@ bolts with real ones. I did that on my 14 Viper when I changed that inner case.

I usually agree with you but in this case no. Those bolts are not ever removed. I will tap the case for the self tappers as far as I can without a bottoming tap and then run them in with red Loctite. Oil tank is same thing. cheap bolts yes but if installed right they will never need to be removed.

 

[Mills]

If you go to a 2017 Viper or 'Winder parts schematic and choose the "Track Drive 2" schematic you will need (1) of Item #1, (2) each of Item #'s 16, 17, 18 ,19 and then you need to get (24) of the M6 x 2.0 x 24mm bolts Item #38. The bolts that thread into the inner case securing it to the chassis and those that secure the outer case cover/oil tank to the inner case were changed from M6 x 1.0 x 20mm used on the pre-2017 chain cases to the M6 x 2.0 x 24mm. 2017 was the first year they used this new bolt in the chain case. All other internal parts and the outer cover that the oil tank is bolted to are the same back to 2014.

 

[cannondale27]

If you go to a 2017 Viper or 'Winder parts schematic and choose the "Track Drive 2" schematic you will need (1) of Item #1, (2) each of Item #'s 16, 17, 18 ,19 and then you need to get (24) of the M6 x 2.0 x 24mm bolts Item #38. The bolts that thread into the inner case securing it to the chassis and those that secure the outer case cover/oil tank to the inner case were changed from M6 x 1.0 x 20mm used on the pre-2017 chain cases to the M6 x 2.0 x 24mm. 2017 was the first year they used this new bolt in the chain case. All other internal parts and the outer cover that the oil tank is bolted to are the same back to 2014.

Oil tank always has had self tappers. Are these different?

 

[Mills]

They are the same as the self tappers for the oil tank. Yamaha is now using them to secure the outer chain case cover to the inner case and the inner case to the chassis. The bolts that pass through the tunnel and tabs of the inner case that have nylok nuts from pre-2017 sleds will still work on the 2017+ inner cases.

 

[cannondale27]

They are the same as the self tappers for the oil tank. Yamaha is now using them to secure the outer chain case cover to the inner case and the inner case to the chassis. The bolts that pass through the tunnel and tabs of the inner case that have nylok nuts from pre-2017 sleds will still work on the 2017+ inner cases.

No kidding! They did that way back in 12,13. Wonder why they went back?

 

[Mills]

The microfiche for the 2014 -2016 Track Drive 2 schematic that I am looking at show the M6 x 1.0 x 20mm bolts and then the M6 x 2.0 x24mm bolts for 2017+. I am using the schematics from Babbits Online.

 

[cannondale27]

The microfiche for the 2014 -2016 Track Drive 2 schematic that I am looking at show the M6 x 1.0 x 20mm bolts and then the M6 x 2.0 x24mm bolts for 2017+. I am using the schematics from Babbits Online.

Yes but in 12/13 they used self tappers.