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Offline petrorabbit

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Re: Gearing - Z900 - version 2.0
Reply #20 on: June 11, 2019, 03:47:11 PM
still idk from what i can see my videos the bike can do 60kmph at 7K rpm in first, second is roughly 88-90 at 7K rpm.
I would add one tooth at the back and i wouldn't mind lol

and the bike can EASILY be started in second gear


Offline Jim

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Re: Gearing - Z900 - version 2.0
Reply #21 on: June 11, 2019, 09:58:28 PM
*Originally Posted by petrorabbit [+]
still idk from what i can see my videos the bike can do 60kmph at 7K rpm in first, second is roughly 88-90 at 7K rpm.
I would add one tooth at the back and i wouldn't mind lol

and the bike can EASILY be started in second gear

Ain't gonna do 60 MPG in first gear at 7000 RPM with stock sprockets.
Last Edit: June 11, 2019, 10:00:45 PM by Jim

Offline petrorabbit

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Re: Gearing - Z900 - version 2.0
Reply #22 on: June 12, 2019, 02:05:46 AM
i don't know about that when the tank is empty i fill it up  :034:

Offline Jim

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Re: Gearing - Z900 - version 2.0
Reply #23 on: June 12, 2019, 02:37:46 AM
*Originally Posted by petrorabbit [+]
i don't know about that when the tank is empty i fill it up  :034:

LOL, that was suppose to be MPH.

Offline Scim77

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Re: Gearing - Z900 - version 2.0
Reply #24 on: June 12, 2019, 10:10:35 AM
Petrorabbit's first posting seems to include an error in the units.  60kmph ????   

It should be either mph or kph.  60kph is about 38mph and the Z would do that in first gear at just under 7000rpm on standard gearing, reaching about 55mph in 1st gear at 9500rpm.

With a 16T front sprocket, 9500rpm will give you just under 60mph.
Who in their right mind would design a vehicle that falls over when it stops?

Offline Jim

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Re: Gearing - Z900 - version 2.0
Reply #25 on: June 12, 2019, 10:49:35 AM
I missed the K. KPH would make sense.

Offline petrorabbit

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Re: Gearing - Z900 - version 2.0
Reply #26 on: June 12, 2019, 12:16:07 PM
lol yeah kmph = kph

Offline zeta

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Re: Gearing - Z900 - version 2.0
Reply #27 on: May 21, 2020, 07:15:08 AM
Wikipedia:
The SI representations, classified as symbols, are "km/h", "km h−1" and "kmh−1". Several other representations of "kilometres per hour" have been used since the term was introduced and many are still in use today; for example, dictionaries list "km/h", "kmph" and "km/hr" as English abbreviations.

Abbreviations for "kilometres per hour" did not appear in the English language until the late nineteenth century.

The kilometre, a unit of length, first appeared in English in 1810,[3] and the compound unit of speed "kilometers per hour" was in use in the US by 1866.[4] "Kilometres per hour" did not begin to be abbreviated in print until many years later, with several different abbreviations existing near-contemporaneously.

1889: "k. p. h."[5]
1895: "km:h"[6]
1898: "km/h"[7]
1899: "km./hr." [8]
1900: "kms./hr."[9]
1902: "k.m.p.h."[10]
1903: "KMph."[11]
1910: "km ph"[12]
1911: "K.P.H."[13]
1914: "km. hr."[14]
1915: "km/hour"[15]
1915: "km.-hr."[15]
1916: "km. per hour"[16]
1921: "kms/hr."[17]
1922: "Kmph"[18]
1927: "kmph."[19]
1933: "KPH"[20]

Offline Josh

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Re: Gearing - Z900 - version 2.0
Reply #28 on: June 19, 2020, 02:19:38 AM
The stock gearing is spot on for me. I don't commute though.  Lucky to live in an area of curvy roads. Due to the lack of wind protection, I find the Z900 sketchy above 115mph or so. I would not want taller gearing

Offline RockyMtnZ

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  • Town / City: Morrison, CO
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Re: Gearing - Z900 - version 2.0
Reply #29 on: June 26, 2020, 09:39:45 PM
Old thread, I know...

I'm looking at different gearing options, and have two questions.

1. 17-41 requires no chain modification, but "the rubber cushioning had to go." You can keep it with 16-41. Why does it "have to go" with the 17-41 arrangement?

2. How do I determine, for a particular set of sprockets, whether the chain will need to be shortened or lengthened?

BTW, here's a quick table I put together with engine speeds for a handful of combinations:

       15-44     16-43     16-41     17-41   
50    3350      3050      2900      2750
60    4000      3700      3500      3300
75    5000      4600      4400      4150
85    5700      5200      4950      4700

Speeds are in MPH. RPM are rounded to the nearest 50.

Thanks!

2020 Z900 (Blue/Silver)

Previous bikes: 1970 Honda CB100; 1972 CB175; 1973 CB350; 1975 CB550; 1977 CB750; 1978 Yamaha 750 Triple; 1980 Goldwing; ... 1995 Honda 750 Nighthawk; 1999 Suzuki SV650; 2002 Honda 750 Nighthawk; 2012 Suzuki DL1000 V-Strom; 2010 FJR1300; 2014 Super Tnr ES; 2016 FJR1300ES; 2018 Ducati Monster 797; 2016 FJR1300ES; 2018 Moto Guzzi V7 III Milano.

IBA# 56124. Three SS1Ks, one BB1500, one BBG; placed 9th in MERA's 2014 Five & Dime 5-day rally (Solo class).