gear change clunky after oil change.

[spannermonkey...]

I've done a top end rebuild on my zx7r and I've been running in the new rings on mineral oil below 4000rpm and now I've swapped to a fully synthetic oil and my once clean gear change is now clunky. Still slowly building the revs up.

Without looking at the clutch basket for friction plate dents that can cause it to hang up, it was fine before but not after the oil change. I assume it's the oil type causing the contaminated friction plates to stick hence a lumpy change.

Before I change the friction plates has anybody else suffered this kind of thing?

I went from mineral rock oil to a fully synthetic Castrol 10/40 BIKE oil.
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Current machines - Aprilia RS250. Kawasaki H1A 500. Past machines - Kawasaki ZX7r P6, Yamaha RD250E (the one that got away), BSA Racing bantam (revs over 10'000 sweet as), Yamaha RXS100, Suzuki GP100, Suzuki GS500K2 - best all year machine ever - come rain, sleet and snow just epic.

[MCN]

I've not suffered it.
I would run it as it is for a bit. If it doesn't calm down then change the oil to the one you had before.
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Disclaimer: The comments above may be predicted text and not necessarily the opinion of MCN.

[spannermonkey...]

a mineral oil would not offer protection under harsh loads and accelerations accelerating wear.
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Current machines - Aprilia RS250. Kawasaki H1A 500. Past machines - Kawasaki ZX7r P6, Yamaha RD250E (the one that got away), BSA Racing bantam (revs over 10'000 sweet as), Yamaha RXS100, Suzuki GP100, Suzuki GS500K2 - best all year machine ever - come rain, sleet and snow just epic.