02GF74
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| posted on 6/12/06 at 11:05 AM |
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bike speedo - longevity?
anyone have any data on how long a bike speedo lasts on a car? in particular the sensor (reed switch)
my rough sums show that a prop shaft mounted sensor will run about 500 times faster than a bike. 
I've been through several bike speedos (on bikes) but never had the reed switch go - it is usually the contacts o nthe head that go bad.
Admitedly reed switches are pennies but it still would be a pain having to replace them.
How have people mounted the magnet on the prop? presumably the sensore is attached to a bracket the bolts onto the gearbox?
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JAG
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| posted on 6/12/06 at 11:45 AM |
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I placed my magnet/reed switch on the inside of one of the back wheels.
So far I've done over 4500 miles and it hasn't missed a beat.
Justin
Who is this super hero? Sarge? ...No.
Rosemary, the telephone operator? ...No.
Penry, the mild-mannered janitor? ...Could be!
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paulf
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| posted on 6/12/06 at 01:08 PM |
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My bike speedo is driven by the magnet on the front wheel and has done over 3000 miles so far with no problems , it is a sigma 1200.
Paul.
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Colnago_Man
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| posted on 6/12/06 at 01:13 PM |
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Slightly O/T but did you know that a lot of bike speedo's have built-in heart rate monitors, might add an extra level of interest for those
hairy track days!
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Kissy
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| posted on 6/12/06 at 04:51 PM |
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Why would you fit the sensor to the prop? Have you considered the axle ratio when inputting the wheel circumference ?
I think I'm with most by fitting to the rear wheel.
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02GF74
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| posted on 6/12/06 at 04:54 PM |
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quote:
Originally posted by Kissy
Why would you fit the sensor to the prop? Have you considered the axle ratio when inputting the wheel circumference ?
I think I'm with most by fitting to the rear wheel.
shorter wires? yep I know what my diff ratio is - I counted it when I replaced the gasket.
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RoadkillUK
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| posted on 6/12/06 at 06:21 PM |
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Sigma 1600 here with the sensor on the front wheel, had no problems with over 3000 miles 
Roadkill - Lee
www.bradford7.co.uk
Latest Picture (14 Sept 2014)
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steve faunch
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| posted on 6/12/06 at 08:37 PM |
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mines done 1100 and still going req new batt once a year tho
fitting on the prop means the read switch works more often shortening its life
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