GSX-R wheels on Laverda triples?

My Corsa has them - seems like quite a lot of work as has been mentioned - I guess the best advantage is tubeless for me - handling here nor there as new tyres in my Jota as good as BT016 on the Corsa - 520 chain and sprockets from Keith 14610F5A-14FF-4E51-827E-EDF464A52C37.jpeg
 
The wheels could be early PVM’s or EPM’s .EPM’s were made by Magniand were not really very light at all🙁. Can’t comment on the early PVM’s but the wheels Lothar mentioned are quite light👍😀
Tom
 
Really? Had a set of PVM rims that came with a 3C to me, replacing the original Borrani rims.
Put them on a scale out of interest. Just as heavy as the FLAM rims.
 
The later PVM’s are quite light as I stated. From memory I think the front was 3.2 kg’s and the rear was 3.8. From again a hazy memory I saved 3.7 kg’s on the rear compared to the standard Laverda assembly. I used a Zane rear caliper mount and axle just to keep it all in the family😂😂[
Tom
 

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I'd agree the 6-spokers shown earlier are likely EPM, they were a period hot rod aftermarket wheel. Like basically all the cast wheels of the period, light they are not! A friend scored a pair in a deal and we looked at fitting them to his Lav but came to the conclusion it's a lot of work for no benefit other than the unusual-factor. I think they were even heavier than the thick web FLAMs.

You can't compare anything like that with the modern forged PVM 5-spoke classic style wheels such as Tommy has. They are works of art and are also very light (especially where it matters at the rim). But I witnessed first hand how terrible PVM were to deal with, it was unbelievable. Sadly there is no way you can recommend them.
 
From all the VERY helpful information above, it looks like this bike must have aftermarket EPM wheels. I see references across the internet to both magnesium and aluminium EPM wheels. It seems clear that EPM made magnesium wheels.

It's less clear that EPM also made aluminium wheels of the same pattern. Does anybody know for sure?

MV Agusta seems to have used magnesium EPM wheels. Correct? Any history of these cracking or causing accidents?

This is all classic project-bike stuff. I asked about GSX-R wheels, turns out the conversion is a headache. I learn my new bike might have magnesium wheels, another headache. If they are magnesium, I'll have to pursue the GSX-R option, find FLAM wheels, or another option like spoked tubeless wheels.
 
I must have missed the discussion of the downsides of magnesium wheels. If the worry is cracking, can’t you take them to a shop that does NDT of aircraft components? Being non-ferrous you can’t Magnaflux them, but they could be dye penetrant checked or even x-rayed if your pockets are deep enough. If the concern is them being damaged on todays potholed roads then that’s a whole other issue and perhaps they are better suited to display bikes.
 
I had 3-spoke PVMs on the Harris, 2,5 front, replaced the 4'' rear with 5,5 rear I found on Ebay off a Kawasaki for around €100. That fit a 160 with 520 chain. Looking on Ebay now I realize that was a long time ago. It probably was 100 DM, not €....
 
Okay, so I removed a brake rotor carrier and exposed the unpainted surface underneath. I cleaned a patch with scotch-brite and tested with vinegar.

No foaming reaction, which means these particular EPM wheels are aluminum and not magnesium. To my great relief.

I'm not sure if they are any lighter than FLAM wheels but they are intended for tubeless tires anyway. I think. Haven't dismounted the tires. And they are period-correct for an '82 Laverda modded back in the day. This bike will never be 1982-original but it can be 1982-period-correct.

A93E4B55-2631-4484-89E3-4E78A42DEDA8.jpeg
 
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