# Rotax 583 Dual ignition head???

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#### fusionfab

##### Well-Known Member
Hey Everyone
I'm building up a Rotax 583 Liquid Cooled engine for a kitfox and just have a question. I vaguely recall reading something about someone have the stock head of a 583 machined for the dual ignition. Is this correct or possible? Or am I thinking of something else. I'd like to convert this to dual ignition, if possible, just for reliability reasons. Thanks for your help.

#### Armilite

##### Well-Known Member
First you have to be sure your 583 Case has Dual Trigger Slots? Post a Photo.

Second, does your 583 Case have all Good Provision 8, Boss's and Holes for Gear Drive? Post a photo.

Third, Yes your 583 Head can be Machined for Dual Plug Inserts, or use the Rotax 582UL Head. Rotax Rick does his 670s that way today.

Forth, most Sled Pipes have a flat spot in the Power Curve in the 3500 to 6750rpms range. You need a Tuned Pipe for the 583 Porting!

Fith, check ebay, many used 582UL heads show up $200 to$350, New \$820.

Rich