Anti rachet drivers top speed

[snowbeast]

Ok for all you guys that have installed the antirachet doo drivers,has anyone seen decreased top speed because of the extra friction that is possible to have with the doo anti slip drivers. I have heard some folks having problems aligning them up properly to the center of the clip and rod,has anyone have this problem,and can someone show me a pic of the alignment specs to install the doo drivers on the apex shaft. I dont ant to go thru all this alignments troubles and on top of that loose top speed with the drivers installed.

 

[KnappAttack]

Mark the shaft where stock drivers are, find center and do the math to locate new drives. Not hard to figure. Only need them on a boosted application, so any decrease in speed is a mute point. Mike Knapp#17

 

[1000 stroker]

I put them on a Viper last year and like them. No alignment problems and no loss of speed. On the viper I think I gained speed if anything because I could run the track so much looser. So far, I don't see the need on an Apex. I can run my track plenty loose without ratcheting. I think that if you go too loose with the track you will loose speed because the track will balloon so bad. If you have your chassis set right, you should not need the anti ratchets. I swore that I would never own another sled without them after installing them last year. BUT, why do it for no gain. Unless your making a bunch of HP, the stock ones will do fine. FYI, I put them on the Viper because it was a big bore with a 136" so I was worried about ratcheting with the lovely proaction.

 

[n2oiroc]

these measurements are from the outside edge of the driver to ends of the drive shaft. 2.45" speedo side and 4.45" chaincase side. mine pressed on fine, no clearance issues and the track is dead center in the tunnel. center to center of the drivers is 8.875".

 

[Alatalo]

I have installed Ski-Doo extroverts #504152503 (9Tx2.52" pitch) in my RX Warrior (Attak).

I mixed the information from the Yamaha service manual with the information from the Ski-Doo racing manual to figure out the correct positioning. Please referr to the attached picture from the Ski-Doo racing manual, previously posted by member "kmodel".

I ended up with the following measurements (checked after mounting):
The distance from the LH side (speedo side) end of the drive shaft to the LH side of the LH extrovert hub is 60.3 mm (2.37").
The distance from the LH side (speedo side) end of the drive shaft to the centerline of the LH extrovert driver is 113 mm (4.45").
The distance from the RH side (sprocket side) end of the drive shaft to the RH side of the RH extrovert hub is 110 mm (4.33").
The distance from the RH side (sprocket side) end of the drive shaft to the centerline of the RH extrovert driver is 163 mm (6.42").

My drivers seem to be in the correct position according to the Ski-Doo racing manual, they line up perfect inside the tunnel (exactly the same distance to both tunnel sides) and the distance between the track clips and the hyfax is also perfect, both sides and all the way.

Though, I have not compared the top speed to the standard drivers...

Hope this helps and Happy New Year!