Powerdynamo brings new ignition & light
to your vintage motorcycle
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Powerdynamo brings new ignition & light |
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| As there have been more than
one type of RD 250 - 400 engine with different crankshafts there are
hence different ignition systems. Different not so much in performance
and design, but physical dimensions. Please before ordering some RD 250/350/400 system from us consult the following important information |
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RD with point’s
ignition systems |
RD with CDI
ignition systems |
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| 1976 RD250C & RD400C 1977 RD250D & RD400D The rotor on these models is retained with a 7mm bolt | From 1978 all RD250/400’s had the rotor retained with a nut, these models are commonly known as 1978 RD250E & RD400E 1979 RD250F & RD400F as well as (for Germany) G models. All these models have CDI ignition systems and the flywheel is retained by a nut | |
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| With this type of shaft there is no uncertanty as to which of our systems will fit | Unfortunately of this type of crankshaft with threaded end exist 2 different versions. Different in length of shaft | |
| Our systems fitting those engines are | shorter shaft | longer shaft |
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For more see below |
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| Our systems fitting those engines are | Our systems fitting those engines are | |
| Unfortunately distinction between the two is problematic and we do not have a way yet of telling over the distance which system you need. More Detail in the following table | ||
| Distinction between the 2 different shaft types with threaded shaft end | |
| shorter shaft | longer shaft |
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| The total length of the shaft end from oilseal exit to end of threading is ca ?? mm | The total length of the shaft end from oilseal exit to end of threading is ca 72mm |
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| we think this is true for RD E TZ F/G/350H and LC (from 1978) | we think this is true for LC RDs produced after 1985 for street and YPVS |
| We had British registered RD 350LC and 400E and Spanish RD 400
with a long shaft bringing the rotor in system 7106 about
15mm above (and beyond) the stator.
The Spanish info was: From January 1985 type 31K and later N1/N2/F1/F2 right up to 1993 RDR. |
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Distinction between the 2 nut mounted versions
is not easy, when you have only one of then in front of you. The difference between
38 and 40mm taper length can easily be misread.
The picture here illustrates what happens when you actually need a 71 13 599 but got a 71 06 599: the rotor sits out of limits. |
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