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I converted an 03 800 to an 03 900 and went to the dealer for gearing.
He looks up the part numbers and comes up with 15 wide top gear and 13 wide bottm gear for 26/41.
I checked browns and found the same thing.
Does any one know how come :dunno:
 

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Originally posted by skyboz@Oct 8 2005, 09:35 PM
Does that mean the bottom gear just sort of "floats around" on the shaft?
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no, it's solid with nut and washer and aligned with usual shimming technique, this allows a very slight (.050'') vs old tolerance of .030'' variable in alignment and the chain will have less tendency to ''climb'' end plates creating ''jump offs'' as it would without near perfect alignment as required before if using both 15T wides top and bottom, the factor that allows this is the lower being 13T wide has more tooth contact with chain and distributes load more efficiently(not breaking teeth)allowing less weight and cost :cn:
 

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I've been using 13W top and bottom for the most of two seasons. When I updated gearing to 26/41 on my early build thats what the dealer put in. Dealer said I wouldn't have any issues and that the 13W is plenty strong - not to mention lighter. No issues yet.....
 

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That's very interesting info! :smiley-faces7: I've never heard of that before but if it works, what the hell, right? Can this be done on my ZL SS? Less rotating weight!
 

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Originally posted by skyboz@Oct 11 2005, 11:02 AM
Is this typical on higher HP sleds? It seems like you could apply it to almost any sled.  :fluffy:
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Yes, but perhaps only a 900's torque exceeds the strength of the 13W top gear.
13W top and bottom must suffice for the smaller /less torquey applications.
 

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All I can say is mine has seen many races from a dead stop to WOT. No issues yet. Could just be luck.
 

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My early build ZR9 has 13w gears and chain. They looked good when I pulled them out for the 26/41 gears. My ZRT 600 with the 13w stuff had issues because of the high engagement... I don't know if torque is a huge issue if you don't slam it in at 5000rpm plus..
 
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