gs500 - prone to little end wear ?

[A100man]

Hi all

I've got my hand on a complete cheap GS500 for a project. It all works but between 3k and 5k there's a pronounced rattle especially under load. Difficult to pin-point but I would say towards the top-end. It sounds to me a bit like little end but could be anything I guess. Pretty sure it's not form the bottom (using my screw-driver stethoscope..)

I haven't checked the valve clearances yet but I'm getting over 140 psi on both cylinders (145- ish) so compression is decent.

Ant thoughts ?

Cheers

J
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Now: A100, SRX250, XJ598, FZ750, SL1000

Then: Fizz, RS200, KL250, XJ550, Laverda Alpina, XJ600, FZS600, Skorpion, GT 250

[orac]

What year? They do suffer from can shaft ever float, if it's that the rattle sometimes chances on how the bike is leaned over
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Current rides - 2016 Triumph Street Triple Rx, 1994 Suzuki Bandit 400 VM, TGB 204 Classic 125cc
"with nothing left to lose, there is everything to gain. It's not the size of the dog in the fight, it's the size of the fight in the dog"

[nowhere.elysium]

I'd be looking at sorting the valve clearances before worrying about more expensive possibilities.
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'10 SV650SF, '83 GS650GT (it lives!), Questionable DIY dash project, 3D Printer project, Lasercutter project

[A100man]

[bikenut]

may be they are tooooo tight??

any markings on the valve pockets on the pistons?? see thru plug holes for "missing" carbon
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nuts about bikes