Shimano SL-S434
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Category:  Shifters
Name:  Shimano SL-S434
Brand:  Shimano
Model:  SL-S434
Years:  1988 - ?
Country:  Japan
Weight:  72 grams
Added By: Kommisar89 on 12/06/07
Updated By: Wolfram Verktyg on 08/05/18
Additional Photos - click for full size
Shimano SL-S434Shimano SL-S434Shimano SL-S434Shimano SL-S434Shimano SL-S434Shimano SL-S434
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Shifter Type DowntubeAttachment Style Downtube - Top Mount;
Downtube Braze-on (standard);
Downtube Clamp-On
Shifting Systems6sp Shimano SIS
7sp Shimano SIS
Friction
Lever MarkingsShimano SL-S434 - Mis-strike on some castings marked 8L-8434
Lever MaterialAluminum  
General Information

These shifters are part of one of the Exage groups from the late 80s.  Not sure exactly which one (or maybe more than one variation of the line).

NOTE: There has been some speculation on if these shifters are 6sp or 7sp.  All references that I can find online about this model of shifter indicates that it is a 6sp SIS shifter, however I have had reports from actual owners who have both claimed to have 7sp and 6sp versions of this shifter.  A quick web search turned up several eBay auctions for these shifters with a clearly visible 7S on the side of the black ring which proves that there were 7speed versions of these produced.  Be aware of what you need and what you are buying.

Addendum: There is a mis-strike on the part number cast into the underside of some left levers. The numbers looks like SL-8434 or 8L-8434 instead of SL-S434. Ive seen these incorrect numbers quite often on the internet. See the last 2 pictures that I posted of the part numbers

SL = Shift Lever. The letter "A" or "S" before the numbers usually indicated the lower priced models from the economy groups.

Quality:Rarity:
 
 
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Resources:Reference & ChartsCatalogs
Brand Information(click to expand)

Shimano Model Number Prefix List:

BB Bottom Bracket BL Brake Lever BR BRake
CB Coaster Brake CJ Cassette Joint CN ChaiN
CP Chain Protecto CR Chain Ring CS Cassette Sprockets
DF chain DeFlector DH Dynamo Hub FC Front Crank
FD Front Derailleur FE Fork Ends FH FreeHub
FS Front Suspension HB HuB HD HanDle bar
HP Head Parts (Head Set) HS Handle Stem IF Inter-3 Freehub
LP LamP MF Multi Freewheel PD PeDal
RD Rear Derailleur RH Rollerbrake Hub RM RiM
RR ReflectoRs RS Rear Suspension SB Shift Brake lever (Nexus, ?)
SC Speed Calculator (cycle computer) SF Single Freewheel Freilaufritzel SG Speed chanGe hub
SH SHoes SL Shift Lever Schalthebel SM SMall parts
SP Seat Post SQ Seat Quick release SS Single Sprocket
TL TooL WH WHeel ST Shift Brake Lever (STI, Rapid Fire, etc)
 
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