YAMAHA ROAD AND RACE
The PowerDynamo Yamaha RD, TZ, YDS, SR and XS Ignition replaces your old Yamaha, Motoplat, Hitachi, Femsatronic or Krober ignition to give a modern, reliable alternative with exceptional performance characteristics.
2 Stroke System Model | 4 Stroke System Model |
| YDS2/3 | SR500 |
| TZ250/350 | XS650 |
| RD250/350/400 aircooled | |
| RD350LC (4L1/4L0) | |
| YDS6/7, R5 | |
| AS1/3 & RD125 | |
| AS1/3 & TA125 Race |
2 Stroke Ignition Systems
Shown below are the PowerDynamo 2 Stroke ignitions:
YDS 2/3 Ignition | YDS 6/7 & R5 Ignition |
|  |
TZ/RD/LC/AS/TA Race Ignition | RD & Aircooled Road Ignition |
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The kit is easy to fit and provides;
- Self generating ignition which can operate without battary
- Stable digital ignition with high energy 40Kv spark
- Race system provided with lightweight rotor for improved engine response.
- Similar advance to other 'period' systems (see Technical page)
- Improved starting and fuel burning to increase engine performance
- No machining required and no need to change engine casing
- Both ignitions provide a 12V/100W DC output for road use
- 24 month warranty
To check which ignition system you need, refer to the pictures below which illustrate the differnent cranks found on Yamaha 2-stroke machines supported.
TZ250/350 A to E RD250/350/400 Aircooled A to D YDS6/7, R5 These machines have a crankshaft with a taper 26.76mm long, starting at 19.54mm and ending at 14.15mm The rotor on these models is retained with a 7mm bolt. | |
TZ250/350 F to G RD250/400 E to DX The rotor is secured to the crank with a nut, as shown. The taper is 38mm long, starting at 24.74mm and ending up at 17.27mm |  |
Yamaha RD 250/350LC The crankshaft taper is longer than the earlier RD aircooled machines. This picture shows the crank from a 4L1/4L0 machine. We believe that this crank is the same for the 31K and N, F2 import. |  |
4 Stroke Ignition Systems
Shown below are the PowerDynamo 4 Stroke ignitions:
SR500 Replacement ignition 
XS650 Replacement Ignition 
XS650 Replacement alternator 
XS650 has some limitations:
- Does not support the original safety relay that prevents starting into an already running engine
- Does not support any existing electronic revolution counter, (we have alternatives)
- Has only 150 watts output, less electric power than the original alternator
The kit is easy to fit and provides;
- Self generating ignition which can operate without battary
- Stable digital ignition with high energy 40Kv spark
- The switchable advance unit comes configured with 9 degree advance for starting to 38 degree at 3,000rpm.
- Improved starting and fuel burning to increase engine performance
- No machining required and no need to change engine casing
- Both ignitions provide a 12V/100W DC output for road use
- 24 month warranty
For further technical details of the PowerDynamo Ignitions see Technical page.
| PowerDynamo and the PowerDynamo.net Logo are a Trademark of PowerDynamo GmbH Western Road and Race Ignitions Scarthoe, Stone Hall Lane, Enmore, Bridgwater, Somerset, TA5 2AL Tel: 01278 438289 |