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All articels are not for road use unless stated otherwise. For show only!
Rev counter
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Rev-Counters
Rev-counters are ideal for race heads that are more interested in rpm than the actual speed. They are also suited to ambitious tuners who can then calculate their real top speed from the engine speed. You can easily look this up in our table on page 80 where the speed in Km/h per 1000 rpm. In fourth gear is listed for each gearbox and primary sprocket combination. With the rpm reading you can then calculate the speed. If you want to now even more precisely, then enter your own scooter's information into the following formula:
gue Koso analo90
89.
U x N x 0,06 x A = V V = Speed U = Tyre circumference in meters A = Final drive ratio N = RPM 0,06 = Calculation factor for Km/h The final drive ratio A is calculated by multiplying your primary drive ratio with your secondary drive ratio. For a TV175 (front sprocket 15 teeth, crown wheel 46 teeth, gear cog 33 teeth, mainshaft gear 21 teeth) the formula would look like this:
a Koso digit0
l
A = (15 : 46) x (21 : 33) A = 0,3261 x 0,6364 A = 0,20753
9
89.
The circumference U of a 3.50 x 10” tyre on 2.50 x 10” rims is 1360mm for a Continental Zippy 1, 1350mm for a Michelin S1 and 1325mm for a Heidenau K61. So, for a Series 3 TV 175, running a Heidenau K61 on the rear rims that reaches 8000 rpm: V = 1,325 X 8000 x 0,06 x 0,20753 V = 131,98 km/h
Koso Analogue Rev-Counter
The Koso analogue rev-counter also boasts a integrated temperature guage. The clear display scale gives an excellent overview up to 16,000 rpm. The digital temperature display can be switched between celcius or farenheit readouts. A temperature probe for water-cooled engines is included, for air-cooled engines you need the Koso temperature probe. A very nice complement to your tuned engine, helping you get maximum revs safely. 48mm diameter.
e Koso-Prob 90
19.
Koso analogue
8060401
89,90 €
Koso Digital Rev-Counter
A multi function rev-counter on which both the LCD display and the rev-counter it'self is self-sufficient and low on energy consumption working off a 3 volt (CR2032) slim battery. The inductive rpm reader pick-up is simply attached to the HT lead. Further functions are a programable alarm which can be set to be triggered at a variety of revs, a stopwatch to measure engine running time, engine temperature measurement in the range 50 to 110 º C and a programable alarm which can be set to be triggered at a particular temperature. For air-cooled engine temperature measurement you need the KOSO AC temperature probe.
Krober
209.-
Fitting instructions included. (Measures 82x45x25mm) Koso digital
TNT180029
89,90 €
Koso AC Temperature Probe
Koso temperature probe for air-cooled engines with a 14mm spark plug. The probe is simply fitted under the spark plug and then attached to the Koso instrument. You should remove the washer that normally sits under the spark plug so that the plug electrodes remain in the correct height in the combustion chamber. Temperature Probe
TNT164041
19,90 €
Pitsch/Kröber Rev-Counter
An analogue rev-counter with a very useful operating range which measures up to 10,000 rpm. A high quality and easily read rev-counter. Justifiably reknowned for it's extreme accuracy. It is delivered complete with the necessary fittings. Should be fitted to minimise exposure to vibrations. Needs no additional power supply. Kröber for Ducati ignitions Kröber for Motoplat ignitions
8060400 8060404
209,00 € 209,00 €