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9/15/2008
Location
Shelby, NC
US
Edited Date/Time
1/9/2019 9:48pm
So my Yamaha 450FX needs a new rear sprocket. I looked in my parts stash and found two new Renthals....good deal.
Unfortunately the Rethal sprockets are for Kawasaki's. They bolt up just fine, but the large cutout in the center of the kawasaki sprocket (that fits over the hub) is larger on the Kawasaki sprocket- meaning it does not fit tightly against the raised lip on the hub that would seemingly help to stabilize the sprocket. There is a gap of about 2mm between the sprocket and the raised area on the hub (that it should fit tightly against)
Im wondering if I am going to demolish my rear hub...maybe from constantly loosening bolts or?? who knows
any other cheapskates ever run a Kawasaki sprocket on a Yamaha?
Unfortunately the Rethal sprockets are for Kawasaki's. They bolt up just fine, but the large cutout in the center of the kawasaki sprocket (that fits over the hub) is larger on the Kawasaki sprocket- meaning it does not fit tightly against the raised lip on the hub that would seemingly help to stabilize the sprocket. There is a gap of about 2mm between the sprocket and the raised area on the hub (that it should fit tightly against)
Im wondering if I am going to demolish my rear hub...maybe from constantly loosening bolts or?? who knows
any other cheapskates ever run a Kawasaki sprocket on a Yamaha?
The Shop
7.00 for shipping.
Ending up in er because the sprocket sheared off at the wrong time pitching you over the bars, mangling the hub, and the rest of the bike in the wreck to save a few bucks. Priceless. Always travel with mastercard.
Be sure to let your riding buddies know what hospital you want to go to when it malfunctions over a jump.
Pit Row
Had I saw the difference, I would have been weary. Are the renthal sprockets you have 50 or 51 tooth? I may be interested in them if you want to just get a Yamaha speocket.
The bore keeps the sprocket running true, the bolts keep it from rotating ( on the hub )
The bolts are nowhere accurate enough to make it run true. Studs on a car are pressed into a flange and the lugnuts and wheels have matching tapers. Sprocket bolts slip through a hole larger than the bolt and tighten with a nut. One side might locate accurately ( being a flat head bolt ) but the other is not even close to the accuracy you need.
I suppose I will get the correct sprocket.
Not the five pound steel primary drive sprocket lol... I honestly dont think this is a safety issue- more of an ovaled out and trashed mounting hole issue. That is what seems to be at least somewhat likely if I run these sprockets long term, and I dont want to trash my hub...
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