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Author Topic: 1972 DS7 The Row Boat  (Read 58051 times)

Offline clem

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Re: 1972 DS7 The Long Road
« Reply #40 on: Mar 13, 2013, 20:49:00 »
Oh and thanks Jp and redbird on the heads up about the rear brakes. The further away(back) from the swingarm pivot, the more it gets amplified. Swagger actually hooked me up with a couple of bits to resolve that issue permanetly ;)
"After every war there are soldiers who refuse to surrender. To this day there are still thousands who cling to their 30+ year old motorcycles, thinking that the war is still on, refusing to concede that the four-strokes have won"

1972 DS7 http://www.dotheton.com/forum/index.php?topic=45886.msg505995#msg505995
1983 CB550sc bobber http://www.dotheton.com/forum/index.php?topic=30599.30

Offline clem

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Re: 1972 DS7 The Long Road
« Reply #41 on: Mar 26, 2013, 22:13:19 »
I finally made some noteworthy progress. I mounted the 2008 EX250 swingarm and wheels. I still need to have the stem from the ZX-6E front end machined down since it is too long, hopefully that can happen this weekend. I am going to have to have some rear shock mounts welded to the swingarm, powder coat the wheel and mount tires. Hopefully after those few things are done I can pull the motor and go through that thing. I have the go ahead to get a building permit to get started on the shed addition. This thing is only 10 x 20 but I'm going to add another 20x 20 onto it! Can't wait.
"After every war there are soldiers who refuse to surrender. To this day there are still thousands who cling to their 30+ year old motorcycles, thinking that the war is still on, refusing to concede that the four-strokes have won"

1972 DS7 http://www.dotheton.com/forum/index.php?topic=45886.msg505995#msg505995
1983 CB550sc bobber http://www.dotheton.com/forum/index.php?topic=30599.30


Offline Swagger

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Re: 1972 DS7 The Long Road
« Reply #43 on: Mar 26, 2013, 23:29:11 »
Secksy!
.....there's no way that little rice cooker is going 100m/h when the work need to get up to those speeds includes a big fuck off fairing shaped like a giant cock. ~Staffy

Weiner tetanus is nothing to scoff at. ~JustinLonghorn

Offline VonYinzer

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Re: 1972 DS7 The Long Road
« Reply #44 on: Mar 26, 2013, 23:29:45 »
Badass man. Keep at it.
Like a river that don't know where it's flowin'
I took a wrong turn and just kept goin'

Offline clem

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Re: 1972 DS7 The Long Road
« Reply #45 on: Mar 29, 2013, 10:14:58 »
I wanted to add a little clarification to this since I haven't posted much detail on the swaps. The DS7 swingarm is 200mm at the pivot. The EX250 swingarm is 205mm at the pivot, thus it had to be cut down on both sides. It actually cuts down to the bearing races on both sides and uses the DS7 thrust washers. The steering stem on the 2001 zx 6e triple is 27mm at the base (part that presses into the triple) and the DS7 is 25mm so I chose to turn the zx 6e triple down the the correct length. The o.d of the zx 6e stem will work with a bearing and race swap. The front wheel from the EX250 will need to have the race bored out as there are no bearings available to match the o.d. of the EX250 wheel and the axle size of the zx 6e. It would have been way easier to use a EX250 front end but the forks were bought before the wheels. I hope that this can help someone else looking to do a similar swap.
"After every war there are soldiers who refuse to surrender. To this day there are still thousands who cling to their 30+ year old motorcycles, thinking that the war is still on, refusing to concede that the four-strokes have won"

1972 DS7 http://www.dotheton.com/forum/index.php?topic=45886.msg505995#msg505995
1983 CB550sc bobber http://www.dotheton.com/forum/index.php?topic=30599.30

Offline Swagger

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Re: 1972 DS7 The Long Road
« Reply #46 on: Mar 29, 2013, 14:40:12 »
So rather than going that route......make an axle (or use an EX axle) to suit and use collars in the forks like the ZX7 forks do. Even easier....have a ZX axle turned to suit the EX bearings. That's going to be loads less expensive than boring the wheel for new bearings. I'm quite surprised no bearings could be sourced....did you try an actual bearing house? Industrial bearing suppliers deal with wacky shit like this all day long....
What are the specs needed for a no-machining solution? Maybe I can help track down bearings.
.....there's no way that little rice cooker is going 100m/h when the work need to get up to those speeds includes a big fuck off fairing shaped like a giant cock. ~Staffy

Weiner tetanus is nothing to scoff at. ~JustinLonghorn

Offline clem

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Re: 1972 DS7 The Long Road
« Reply #47 on: Mar 29, 2013, 17:15:53 »
Swagger, I did look around for bearings but I may have missed it. One of my friends has a mill and said that he could do it no sweat. The main problem is that the od of the wheel races are too close to the od of the axle. I don't know how reliable a bearing that thin would be up front. I didn't even think of axle spacers, thanks for the idea. I'll post up some dimensions this afternoon.
"After every war there are soldiers who refuse to surrender. To this day there are still thousands who cling to their 30+ year old motorcycles, thinking that the war is still on, refusing to concede that the four-strokes have won"

1972 DS7 http://www.dotheton.com/forum/index.php?topic=45886.msg505995#msg505995
1983 CB550sc bobber http://www.dotheton.com/forum/index.php?topic=30599.30

Offline clem

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Re: 1972 DS7 The Long Road
« Reply #48 on: Mar 30, 2013, 11:34:32 »
Swagger the outside diameter of the wheel race is 34mm and the zx 6e axle is 20mm. The closest size bearing that I could find is a 6904-2RS.
"After every war there are soldiers who refuse to surrender. To this day there are still thousands who cling to their 30+ year old motorcycles, thinking that the war is still on, refusing to concede that the four-strokes have won"

1972 DS7 http://www.dotheton.com/forum/index.php?topic=45886.msg505995#msg505995
1983 CB550sc bobber http://www.dotheton.com/forum/index.php?topic=30599.30

Offline clem

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Re: 1972 DS7 The Long Road
« Reply #49 on: Mar 30, 2013, 15:17:27 »
Got to give it up to Swagger, The ZX axle will be turned down. That is the least amount of headache since we will only have to make the threaded collar for one end of the axle. We can also use the EX250 speedo drive, seals and stock bearings. My buddy Don said that will be the quickest route. Did you realize that I was no Machinist? Lol. Thanks for the insight found on this board.
"After every war there are soldiers who refuse to surrender. To this day there are still thousands who cling to their 30+ year old motorcycles, thinking that the war is still on, refusing to concede that the four-strokes have won"

1972 DS7 http://www.dotheton.com/forum/index.php?topic=45886.msg505995#msg505995
1983 CB550sc bobber http://www.dotheton.com/forum/index.php?topic=30599.30