GPZList Digest, Vol 181, Issue 1

Fri Oct 17 17:51:47 PDT 2025

JT 45T rear sprocket 
JT 17 T front sprocket
530 chain 112 links


> On Oct 17, 2025, at 5:15 PM, Paul Heim <pmheimjr at gmail.com> wrote:
> 
> I still have mine, but need to do some work on it. I’ve not messed with the chain or sprockets but I have noted Mr. Zeller’s advice!
> Regards,
> Paul
> Sent from my iPhone
> 
>> On Oct 17, 2025, at 5:50 PM, Rickard Olsson <richie at webhackande.se> wrote:
>> I still got mine too, but lately I've been riding a fast triple black BMW
>> R1200 GSA.
>> 
>> The Geeper has been in the garage, in need of some TLC. I'll get around to
>> it, one of these days.
>> 
>> / Richie
>> 
>>> On Sat, 18 Oct 2025, 00:45 dominatr37, <dominatr37 at optonline.net> wrote:
>>> 
>>> Hello, guys. I'm still here and I still have my GPZ. I have 5 other bikes
>>> besides it. Ralph L Angelo JrAuthor of Cool Stuff
>>> Http://tinyurl.com/ralphsamazon2
>>> -------- Original message --------From: "William P. Zeller" <
>>> bill at cherryriver.com> Date: 10/17/25  5:06 PM  (GMT-05:00) To: Ralph <
>>> DOMINATR37 at optonline.net> Subject: Re: GPZList Digest, Vol 181, Issue 1
>>> Bill-Good to hear from you.Regrettably, I parted with my GPZ a while back
>>> for inexplicable reasons.  Still a mystery as it was running and going
>>> flawlessly.My stock chain went 48,000 miles on a diet of PJ-1 Blue Label.I
>>> replaced it with the then-current EK VX-2 X-ring chain.  I did not replace
>>> the sprockets, as they looked fine to me.The EK chain had 58,000 miles on
>>> it when I sold the bike, still spinning on the OEM sprockets.  The chain
>>> was still quiet-running, virtually kinkless, and still within the specified
>>> stretch limit on the 21-link test.And the sprockets were still
>>> decent-looking.Needless to say, it's been all EK VX-series X-ring chains
>>> ever since.Bill ZellerLemont, IL(FJR1300, CBR11 Blackbird these days, a
>>> worthy replacement for the ZX)On 10/17/2025 2:00 PM,
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>>> GPZList digest...">>> Today's Topics:>>     1. Chain & sprockets (William K
>>> Denton)>>>
>>> ---------------------------------------------------------------------->>
>>> Message: 1> Date: Fri, 17 Oct 2025 14:47:34 -0400> From: William K Denton <
>>> wkdenton at verizon.net>> To: GPZ List <gpzlist at lists.micapeak.com>>
>>> Subject: Chain & sprockets> Message-ID: <
>>> 05379042-98DB-4E92-91AB-FC93FD044366 at verizon.net>> Content-Type:
>>> text/plain; charset=utf-8>> Hello list,>> I hope I’m not the only person
>>> left on this list that actually owns a GPZ 1100 in North America lol.>> So,
>>> I turned 40,000 miles a couple weeks ago and it’s time for new chain and
>>> sprockets and I’ve come up against a little situation that I’m sure you all
>>> already know the answer to.>> First, about the chain:> My chain is the
>>> original stock EK50UV – XX112L, manufactured by Enuma in Japan.> On the
>>> Enuma website, it says that EK50 chains are “generically equivalent to 520
>>> chains”, i.e. 5/8” pitch and 2/8” width between the inner plates. Well, I
>>> verified the 5/8” pitch value, but when I measured the chain width, it
>>> measures 3/8” between the inner plates, which would make it a 530 chain,
>>> not a generically equivalent 520 chain as Enuma’s website claims. Please
>>> explain. Also looking for experience based replacements for the OEM
>>> chain.>> Drive (front) 17T Sprocket:> This sprocket is NLA from momma Kaw,
>>> so I’m looking for generic equivalents for this item that are otherwise
>>> identical to the OEM piece.>> Driven (rear) 45 T Sprocket:> Although this
>>> sprocket is still available from momma Kaw, I’m thinking that there are
>>> other equivalent alternatives to the $119 OEM piece. Experience based
>>> suggestions encouraged and appreciated.>> That is all, and I appreciate any
>>> insight and recommendations based on your own experiences. I look forward
>>> eagerly to your replies.>> Best regards,> Bill Denton> Yardley, PA>
>>> 267-980-7788> WKDENTON at VERIZON.NET> Lazarus CycleWorks> We Breathe New
>>> Life into Old Bikes>> Sent from my iPhone>>> End of GPZList Digest, Vol
>>> 181, Issue 1>
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