The Friendship Bike - NobleHops restores a 75 Z1

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Re: The Friendship Bike - NobleHops restores a 75 Z1

17 Jul 2015 10:59
#681363
swest wrote: What kind of glue do you use on neoprene?
Steve

Cyanoacrylate variants, aka "Crazy glue". Example:

www.amazon.com/MxBons-Premium-Ring-Glue-Instant/dp/B00IOFVO2G

My next door neighbor has a kit, makes one-offs as needed, so if I get a fattie that will sit in there, I'll glue it to size with that.
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Re: The Friendship Bike - NobleHops restores a 75 Z1

17 Jul 2015 11:02
#681365
spdygon wrote: Yes...no vertical play. Nice and tight.

Yep, that sure looks nice and tight to me. If you're in the mood to do a little more sleuthing, see if you can measure the gap under the top clamp, which is for all intents and purposes, the same as measuring the thickness of the nut I machined.
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Re: The Friendship Bike - NobleHops restores a 75 Z1

18 Jul 2015 07:33 - 18 Jul 2015 07:41
#681485
NobleHops
7.83mm
Are u sure u place the bigger bearing on the bottom and the small on top
If u have them backwards that may be the reason u have that gap.
1982 GS1000sz Katana ( #15...17K Miles)
1982 GS1000sz Katana ( # 297....7100k Miles)
1978 Kz1000 Z1R. 10K Miles1
1978 kz1000 z1r 27k miles
1977 KZ 1000 A ( Project ) 54K Miles
1976 Kz900A4 (Red)21K miles
1976 Kz900A4 ( Red)7500 miles
1974 Z1 900 project
Last edit: 18 Jul 2015 07:41 by spdygon.

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Re: The Friendship Bike - NobleHops restores a 75 Z1

19 Jul 2015 21:53
#681729
Ya, I'm certain they are where they belong. The top bearing would not fit on the stem.

I tucked an oring below the bottom ring and now they're perfect. That was a great idea Steve,
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Re: The Friendship Bike - NobleHops restores a 75 Z1

18 Sep 2015 05:31
#690651
Any updates?

Specifically the fork mods. Looking at tearing into my stockers soon.
1975 Z1 900
1994 KX250 Supermoto
2004 KX125

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Re: The Friendship Bike - NobleHops restores a 75 Z1

18 Sep 2015 06:36 - 18 Sep 2015 16:32
#690666
Kidkawie wrote: Any updates?

Specifically the fork mods. Looking at tearing into my stockers soon.

Howdy Kid,

Not much to report, I have been very busy, so the poor Z1 has been neglected mostly, The mods are of course finished, you saw the posts, were you looking for a riding impression?

You're going to need to lop the tops off those damper rods as I showed prior.

N.
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Last edit: 18 Sep 2015 16:32 by Patton. Reason: rule compliance

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Re: The Friendship Bike - NobleHops restores a 75 Z1

18 Sep 2015 08:51
#690684
Thanks. Yes, was looking for a ride report.

RT calls for an emulator adapter, I believe it's just an aluminum cup. Did you mod the damper rods on purpose? I don't really like permanent modifications. It's my Dads bike and I pretty much preserved it so I'm trying to be as gentle as possible to make it a better rider.

What spring ratio did you go with? Do you know what stock is? I'm pretty good with modern MX suspension, just trying to get my head around the numbers. Might start with just springs and see where I'm at. Thanks again.
1975 Z1 900
1994 KX250 Supermoto
2004 KX125

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Re: The Friendship Bike - NobleHops restores a 75 Z1

18 Sep 2015 08:52
#690685
Also, it's hard to find a bike with those suspension mods WITHOUT frame bracing. Thanks.
1975 Z1 900
1994 KX250 Supermoto
2004 KX125

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Re: The Friendship Bike - NobleHops restores a 75 Z1

18 Sep 2015 09:03 - 18 Sep 2015 09:03
#690688
Also, you can experiment with different weight fork oils. Bel Ray makes fork oil ranging from 2.5w - 30w (see link below) and they can be mixed together to fine tune the forks. I've been using their 15w for many years and it works great. Ed

www.belray.com/bel-ray-high-performance-fork-oil
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Last edit: 18 Sep 2015 09:03 by 650ed.

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Re: The Friendship Bike - NobleHops restores a 75 Z1

18 Sep 2015 09:26 - 19 Sep 2015 10:26
#690694
Kidkawie wrote: Thanks. Yes, was looking for a ride report.

RT calls for an emulator adapter, I believe it's just an aluminum cup. Did you mod the damper rods on purpose? I don't really like permanent modifications. It's my Dads bike and I pretty much preserved it so I'm trying to be as gentle as possible to make it a better rider.

What spring ratio did you go with? Do you know what stock is? I'm pretty good with modern MX suspension, just trying to get my head around the numbers. Might start with just springs and see where I'm at. Thanks again.

Yeah, you kind-of have to lot the tops off because that's where the oil flows. On Honda and Suzuki damper rods you simply drill out the existing holes and add 4 more way down on the rod, and so it is in theory reversible because you can reweld those holes, but who would?

I went with .90 kg springs, not sure what stock is.
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Last edit: 19 Sep 2015 10:26 by Patton. Reason: rule compliance

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Re: The Friendship Bike - NobleHops restores a 75 Z1

18 Sep 2015 09:40 - 18 Sep 2015 10:02
#690696
650ed wrote: Also, you can experiment with different weight fork oils. Bel Ray makes fork oil ranging from 2.5w - 30w (see link below) and they can be mixed together to fine tune the forks. I've been using their 15w for many years and it works great. Ed

www.belray.com/bel-ray-high-performance-fork-oil

Cool Ed, good info. I have a neat chart pertaining to this, just waiting for permission to share it.

N.

EDIT:

Alright, this is pretty interesting. Claimed vs measured viscosities of fork oil:

mahonkin.com/~milktree/motorcycle/fork-oil.html
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Last edit: 18 Sep 2015 10:02 by NobleHops.

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Re: The Friendship Bike - NobleHops restores a 75 Z1

18 Sep 2015 11:09 - 18 Sep 2015 11:10
#690703
Thanks for the info.

I'm going to start with just springs. If I want to go any further I'm going to source a set of spare forks or damper rods first.

I was just finishing up modifying a set of ZRX shocks and found a bad bladder, so I'm trying to source one of those now.
1975 Z1 900
1994 KX250 Supermoto
2004 KX125
Last edit: 18 Sep 2015 11:10 by Kidkawie.

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