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Post by crazypj22 on Jun 29, 2009 20:00:07 GMT -5
Leo, have you checked out how heavy duty Harley spokes are?
40 spokes, 5x4.5mm dia, butted (for comparison, XS is 36spokes 4x3mm, butted)
All the 'heavy' bikes use 16" rims so spokes are also real short which makes wheels stiffer (just as a drum rear gives shorter stiffer spokes)
Using a front hub with long 'thin' spokes on rear increases chances of failure in my opinion
Maybe I'm just paranoid about things breaking but, on a street bike the extra few pounds is pretty meaningless in view of the extra safety margin.
PJ
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Post by xsleo on Jul 1, 2009 3:25:18 GMT -5
I agree that a smaller wheel , larger hub is stronger. The strength may be why Yamaha never built a spoked wheel with a disc brake for the 650.
I understand about the difference on the power pulse difference on the 2 vs 4 cylinder engines. Suzuki and Kawasaki used a cush drive, wouldn't this help smooth out the twin cylinder power pulses enough to be usable?
You can get heavy spokes for most wheels can't you?
From what I have seen of the Kawasaki and Suzuki wheels they used a larger hub, nearly as big as a drum brake hub.
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Post by xsfanatic on Jun 8, 2013 18:04:56 GMT -5
How about fitting a Kawa Z1000 rear wheel from late 70´s?
Looks about the same as XS650 wheel, but has disc brakes on it.
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Post by kopcicle on Jun 10, 2013 1:20:43 GMT -5
I was asked elsewhere so ...  The rear caliper is bone stock 2F0 . I was careful to leave as much of the conversion stock as possible . With the un-modified KZ750B LTD M1 twin 18" disc brake hub and rim the Honda disc centers in the caliper once .200" is taken off the diameter . Now one caution , the disc was "marked" CB200C but I did not take it off myself so I won't swear to it . I'm told that the KZ305 is very similar also so ya pays yer money and takes yer chances . I did turn down one side of the rear hub and I believe it was the sprocket side so the KZ 650 sprocket would fit over the the hub. I'll know more in a week or so . As the project stands the disc is centered in the caliper and the sprockets are so nearly in alignment that I may be able to let it go . I did have to futz with spacers for hours but it fits .start from the caliper bracket and move right to left making the spacers , no two swing arms will be the same. I should say almost fits . I'll have to pull the rim toward the drive side about 3/8" to put it on center line but with all else falling into place I'm far beyond complaining. I had considered the modification of the front hub to carry sprocket and disc but going without the dampener was more than I or the gearbox and transmission could tolerate . I started with a stock 2FO disc swing arm that originally carried a mag wheel and disc . The Wheelmaster , Morrie and James Burkman built the wheel that is going on . the one pictured is the prototype and shop roller . The only complicated process is making the spokes and being able to produce the offset . I've used Morrie and Jim for years so why should I change now ? I strongly recommend you contact them if you attempt this . I've talked about this with Dick several times but the senile old fart forgets what he had for lunch . ~kop |
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