Longer coil wires

I need an extra 5 inches for my coil wires. Will it damage the coil if I extend it sodering it together and use a Heat Shrink tubing as insulation. Has anyone have done this?

For coil wires, are you referring to the 2 wires from CDI to engine or plug wire. You can use a 7mm auto plug wire if that needs to be longer. If you need to lengthen the CDI wires, you can splice in a wire. I used about 2' of lamp wire on my build and it is fine.
Here's pics. CDI is behind the seat post and the wire runs down the seat post, under the bottom bracket and back up to motor.
First Build - Diamondback Outlook

Thanks bseelback

I solder & heat shrink the CDI wires on ALL of my bikes!

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Yep solder em up

ok are you talking about the primary wires or the seconday wire...the secondary(one that goes to the plug)is made of fiberglass...it has a high resistance but the voltage out of your coil pack is high...remember its gotta also jump a spark gap...the primary wires cannot have resistance to them...i don't care if you solder, buttconnect, or twist them together...as long as you have got good contact then this thing will run

Not sure what you meen by primary and secondary wires.

There are 2 wires from the cdi solder them to the wires off the motor thats all

The sparkplug wire (Or cdi wire) does not have fibreglass in it

the 2 from the motor are your primary ignition wires...dude just connect them in a waterproof fashion...the secondary ignition circuit is your plug wire and ground...that is how it is, i dont care what gas engine you work on...

Dude i can see that you dont care but the origional question was about soldering the wires not wraping em in electrical tape.

hey im sorry to offend you....didnt mean that.....ok your looking to extend the primary wires....dude when i have to solder(profesionally) i actually due it with a very small butaine torch...no soldering tip on it....its kinda a pen torch....dude its just a coil pack anyway....its cheap ****....go ahead and solder away and if your not stupid you will probably be fine....if not the part is cheap enough anyway...go at it!!!!