New CDI Box for 1972-1975 Kawasaki H2 and 1973 H1D
Price: $109 each, 5 year warranty


  • Newly manufactured direct replacement for an original H2 CDI ignition unit

  • Made in the U.S. by and for Triple owners

  • Similar electrical design to original CDI boxes, but with reliability improvements

  • Component ratings equal to or higher than originals

  • Housings hand fabricated from heavy gage 304 stainless steel

  • Maintains original advance curve

  • Five year warranty

This is a newly manufactured OEM style CDI box, made to replace a stock unit in any Kawasaki H2 or 1973 Kawasaki H1D motorcycle. Internally, it is a modern copy of an original unit, with a similar electrical circuit, and components equivalent or superior to the originals. The main capacitor is rated 3 uF, which is the same as originally installed in 1972 boxes*, and the correct rating for this system.  The main electronic component, the Thyristor (SCR), is rated at 8 Amps, much more robust than the original 3 Amp device.  The housing is hand fabricated from heavy gage 304 stainless steel, beautifully finished with a brushed appearance, and designed to fit perfectly in the original mounting plate. The circuit is sealed in high quality epoxy potting compound for protection from moisture and vibration.

This CDI unit works like one of the original units in every way, including the advance curve.  It produces fat, bright blue sparks at modest kicking speeds, like the original CDI unit did when new.  It can be mixed with original CDI units to replace a single failed box, or be used with other new units to upgrade a system. 
We will repair or replace this unit, or refund the purchase price (at our option), if it fails to perform properly as a result of defects in materials or workmanship, within five years of the date of purchase.
Note that the wires on this unit have lengths matching the original 1972 boxes, and are as follows, measured from potting compound to tip of connector: Red-8", White-10", Green-4", Black-3". Later H2s may have some wires slightly shorter, and these units will work fine as replacements. The 1973 H1D has boxes with longer wires. If purchasing for an H1, check your installation. We can supply boxes with longer leads if required, with a few extra days for custom assembly

* There is some confusion on the net, relative to the rating of the original capacitor. Some sources refer to the original capacitor as a 2.35 uF unit. This probably comes from a schematic diagram shown on a Kawasaki triples resource page, which shows two 4.7 uF capacitors in series to achieve a satisfactory voltage rating, resulting in a total capacitance of 2.35 uF. Actual disassembly of an original 1972 H2 CDI box at our facility revealed a single capacitor rated at 3uF, 600V. This is the rating of the capacitor in our new unit. We haven't disassembled old CDI boxes from all model years, so it's possible that later boxes had inferior capacitors, but it's unlikely that any original boxes had capacitors with higher ratings than our replacements.


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