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May 12

Posts: 5

theklrnut says:

gpz 500 wont start

hi guys ive recently restored a gpz 500 that lay in a garage for 4yrs the tank was rusty inside had bike running with tank off putting petrol in to fuel pipe ran ok a bit spluttery dying when revved as there had been fuel left in bike stripped carbs cleaned jets and reassembled bike was stipped engine frame painted swinginarm removed welded resprayed tank and plastics resprayed wheels etc as this took a few months over winter bike now rebuilt but wont start tank cleaned out and inline filter put in fuel getting to carbs both plugs sparking tried with tank on and running fuel straight into main fuel line now and again a loud backfire tried pouring fuel down bores heating plugs brand new battery its driving me crazy any info much appreciated thanks guys:upset:

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  • Posted 3 years ago (11 May 2012 23:51)

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Nov 07

Posts: 2432

smidget says:


If you stripped the engine then check the ignition timing, also check that you have the correct HT going to the correct cylinder.

I am not sure if this bike runs with a lost spark set-up.

More info would help in a better diagnosis 

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Jan 08

Posts: 7737

kcmc says:

Kawasaki GPZ 500S Year?

Hi thekirnut

Quick one,if your sure everything you have done is correct?then try some easy start and a new set of plugs(i know you have new plugs)sounds like you may have flooded the engine and killed the new plugs?.Try taking the plugs out,spray some easy start down each plug hole and turn the engine over on the starter(this should dry things out and help with combustion).replace with new plugs turn petrol on,no choke yet,turn the engine over on the starter while spraying short bursts of easy start into the air box(top off and filter removed)if the bike starts try keeping it going until warm,only use the choke if it wont stay running with out it.Good Luck


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May 12

Posts: 5

theklrnut says:

gpz 500

thanks for ur help try again tmoro weather permitting:biggrin:

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