T500 500/Five - Spark Plug Wiring Orientation from Coil

For those wanting to keep their bike the way the factory made them.

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DaytonDave
Still in the Driveway
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Suzuki 2-Strokes: 1968 T500

T500 500/Five - Spark Plug Wiring Orientation from Coil

Post by DaytonDave »

I have owned my 1968 Suzuki 500/FIVE (short wheelbase) since I unpacked it from the crate in 1968 and assembled it at the dealership. The spark plug wires were always set (from the factory) to cross each other near the top of the frame before going to the plugs. In fact they could not easily be re-routed otherwise without re-threading them between the wiring harness and carb cabling and upper frame. When setting points and timing over the years many times, the setup was just like the manual indicates - nothing strange there. The bike always ran great this way (11,000+ miles) and in fact I never paid attention to that detail except I have the tank off now to re-line it and noticed it and thought it strange. Mind you, this bike is so original that it even has the factory silver foil stickers on the plug wiring! Intuitively, I would have expected the factory wiring to run from left coil to left plug and right coil to right plug. Has anyone run across something like this and does it matter? Thanks for input. :up:
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jabcb
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Suzuki 2-Strokes: 69 T350 thru 75 GT750
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Re: T500 500/Five - Spark Plug Wiring Orientation from Coil

Post by jabcb »

Typical of the twins, the coils can be installed facing forward or backward. HT leads are crossed with one direction & not with the other.
There was some variation in the orientation when Suzuki built the bikes. Plus shops/owners did whatever they did when replacing the coils.
BAS (Bike Acquisition Syndrome) - too many bikes but have room for more

Suzuki:
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T500 69 project & 73 project
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DaytonDave
Still in the Driveway
Posts: 9
Joined: Fri Jun 03, 2022 1:37 pm
Country: USA
Suzuki 2-Strokes: 1968 T500

Re: T500 500/Five - Spark Plug Wiring Orientation from Coil

Post by DaytonDave »

Thanks very much jabcb. That makes sense and clears up the mystery. I will leave it be. :clap: :up:
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