running out of threads on the axle collar 86atc250r

[fordnut79@hotma]

OK guts, don't mean to beat this topic to death but look at these pics The hub doesn't seem to be machined to accept a bushing and there looks to be some type of bushing in there already. Its magnetic and I cant scratch it with a hobby knife so I'm thinking its steel. Plus don't want to order a bushing if it wont fit. 34 bucks Canadian.

[bkm]

Alright here it goes. You don't need the spacer against the sprocket flange, the steel part is the splined insert pressed into the sprocket flange for strength. What you need to do is us the threaded/splined collar you have, flat nosed lock nut from an 85/86 atc, and the little sleeve/collar that fits over the snap ring............ or, use the nut you have and locate a longer splined/threaded collar for use with that nut..............or buy a Lonstar antifade. Those are your options.

[fordnut79@hotma]

Thanks guys, your experience and wealth of knowledge is really appreciated!

[HairyJR]

If you decide to replace the axle nut and nut washer the 350x parts are the same. You only gain @ 7mm more thread engagement even though its correct. One other option is to machine a spacer/sleeve ( 40mm ID x 50mm OD x 7mm -10mm thick) placed between the splined threaded sleeve and brake hub.

"HJ"

[Red Rider]

The hub doesn't seem to be machined to accept a bushing and there looks to be some type of bushing in there already.

Looking at the pics of your sprocket hub, like you said, it isn't machined to accept a bushing over it. You can see the wear marks on the aluminum hub where it has been rubbing against the seal. Your axle/sprocket hub must be an older design that didn't have a steel bushing for the wear surface. To satisfy your curiosity about whether or not it is supposed to have a bushing on the sprocket hub, slide your axle into your bearing carrier. If the seal seats around the sprocket hub nicely, then there is no room for a bushing, and therefore wasn't designed to have one. I'm convinced your lack of threads issue is what bkm has been telling you. I'm sorry I lead you down the bushing path, but the current designs have a bushing there, as steel will wear better than aluminum.