Practical Sportsbikes (UK) - - Contents -

Weird run­ning woes, liq­uid­heated carbs or not and more

I’m tear­ing my re­main­ing hair out. I have a 1999 Kawasaki ZX-6R with is­sues that don’t make sense. It all starts when I hit the starter. Some­times it turns over for a life­time, even­tu­ally fir­ing, other times it does noth­ing. No flick­er­ing lights. No funny noises. Noth­ing. Noth­ing that is, un­til I tap the rear of the seat. Then it fires straight up and off we go.

Maybe it’s a clever se­cu­rity mea­sure. The trou­ble is, that isn’t the only prob­lem. Af­ter go­ing through the start-up pro­ce­dure/ faff, and rid­ing for 10-20 min­utes, I lose all power and a strange noise de­vel­ops. It sounds like there’s a hole in some­thing. The bike quickly dies and then won’t start. Tap or no tap. It needs to cool down be­fore even con­sid­er­ing a start again.

I’ve changed the bat­tery, all re­lays in or around the seat area, played with wires, looked for cor­ro­sion on wiring, changed the spark plugs and used my mul­ti­me­ter on ev­ery­thing to the point where it’s given up too.

I’m con­vinced there are two is­sues, or my bike has mul­ti­ple per­son­al­i­ties. Grant Sadd, Lincs

Gary Hurd says: Faced with a schiz­o­phrenic ma­chine such as this, my usual ap­proach is to at­tack one prob­lem at a time. It’s sur­pris­ing how of­ten this leads to the res­o­lu­tion of all the prob­lems.

First thing to sort is your elec­tri­cal is­sue. Get to grips prop­erly with the back-end electrics, check­ing and clean­ing earths and CDI plugs and con­nec­tions. The elec­tri­cal junc­tion box and fuse holder on these is known to cause is­sues so get stuck into these too. Also, check for fuses that look good or test okay but are in fact cracked. Once the bike is back to start­ing first time, we’ll see what hap­pens af­ter that.

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