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 Post subject: Digiplex 2s gets cooler (part 2)
PostPosted: Tue Oct 04, 2005 4:58 pm 
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Joined: Wed Oct 06, 2004 12:00 am
Posts: 321
Location: Nottingham, UK
model: 906 Paso
year: 1989
Just like I promised as soon as I raced my Paso I would inform the Paso forum about the changes. But not only did I add cooling fans to the ignition unit I also placed a temperature sensor on the ignition unit and changed the Magneti Marelli ignition coils to units from a Kawasaki GPZ500s! The improvement to the firing has been exceptional. Here are the statistics : Before the coils were changed the ignition unit reached 29 C at 50 mph and peaked at 37.6 C at lower speeds. The Marreli coils were measured for resistance and were 0R4 (primary) and 3K6 (secondary). The Kawasaki coils were 3R (primary) and 13K8 (secondary), meaning at least 1/3rd less operating power. When riden, the temperature reached at 50 mph was 27.4 C and the peak was 30.2 C. Whilst racing (Donington GP) the temperature was 28.5 C and did not vary from that (external temp was 17.7 C). Before the coil change I still noticed a misfire above 7000 rpm but after, that was totally gone. Bauke's mod of using a relay to raise the supply voltage to the ignition unit has also been done.


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PostPosted: Wed Nov 09, 2005 8:24 am 
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paso grand pooh-bah
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Joined: Tue Oct 26, 2004 12:00 am
Posts: 1304
Location: Kapiti, New Zealand
model: 750 Paso
year: 1988
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Good stuff, JW! Sounds like you're having fun.


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