1990 GPZ No Power to ignition (need help locating main fuse)

[newbiker1]

Hi guys,

i recently bought a gpz that had been stood fora couple of years. I rode home on the motorway doing 80 and it overheated and melted the sparkplugs.

i tried to start it, but because the spark plug cap melted it just wasnt catching.

when getting home, the battery was flat but had enough power for headlights. i put the battery on trickle charger for some hours, reconected, and now im not getting any power at all to the bike.....not neatural light, headlight, nothing.

I checked the fuse box and the 20amp is blown (which i have ordered more on ebay). but im thinking it could be the 30 amp main fuse aswell possibly, but have trired for approx 2 hours to locate to no avail.

what is the 20amp fuse used for in the bike, and could replacing that alone give me back power?

another thing, ive also tried jump starting off a car, and push & bump start, with not so much as a turnover.

the carbs have now been stripped and cleaned, so just need to located this 30amp and get her running again.

pictures would help but realise not many people own this particular bike anymore, but im hoping most gpzs have same location of main fuse.

[temeluchus]

GPz what? there are few different models called GPz, 900, 600, 500, 500 and probs a few more in 1990.
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Some shite cruiser. Now with guns and FREEDOM!

[J.M.]

20A fuse may be the ignition fuse, so effectively you can't turn the bike on hence no lights. I may have a diagram if you tell me the year/model... I have loads of workshop manuals.
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2004 R1 & 2018 XSR900

[newbiker1]

gpz 305 sorry

[stinkwheel]

On top of the starter solenoid. Follow the big fat wire from the battery positive.

BUT

If it overheated enough to melt a plugcap doing 80mph, you have more serious problems. Probably running lean as hell but could also be a serious oilfeed issue.

You do know about these bikes and their propensity for blowing up, seizing, melting or otherwise shitting themselves in a costly and terminal manner right?

It may already have done so.

Engine 1:
https://i48.photobucket.com/albums/f216/stinkwheel/305/Image010.jpg

Engine 2:
https://i48.photobucket.com/albums/f216/stinkwheel/305/Image031.jpg

Engine 1 again following crank-up rebuild.:
https://i48.photobucket.com/albums/f216/stinkwheel/305/Image079.jpg

I gave up taking photos after engine 3 seized.
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.