I agree that 42 is the answer for everything in life but not for my current question:) Sent from my SCH-I535 using Tapatalk
If you are looking for input rpm at the cable vs. readout on the tach, I know it is 1:2 for the /5 bikes. That is, if the cable is turning at 3000 rpm the tach should read 6000. Not sure what it is for other models, though.
What do you need to know for electronic ones? My race bike tacho did not like 8000 rpm and the needle fell off....:huh Thinking aftermarket of oilhead one...? probably need one that reads to 10k for the next engine.
On the race bikes we have always used the oilhead tachs. I'm looking for something small for my shop truck(/2 conversion).
That's what I always assumed. Or that they'd certainly be in the case of a certain German manufacturer.
I use one of these on my little Honda, they're available in various ratios, I'm not sure about a 2:1 version though. http://www.dimecitycycles.com/vinta...ni-chrome-white-face-tachometer-15-0033w.html EDIT: Here you go, neat little 2.5" tacho in 2:1 ( It's described as a Harley fitment so that may put you off :) ) http://www.ebay.com.au/itm/like/261...e&hlpv=2&ops=true&viphx=1&hlpht=true&lpid=107