August 22' out of stock for at least a few months now new ones - but if you need desperately, i have some in reserve or many good used ones so message me and i can discuss via whatsapp with you or phone in uk
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New OEM set of 3 Standard size Piston Rings for the Vire 7, 12 or Vire 6 BVR engines (Bright silver Chromed)
All three are now reccomended in this chrome to prevent rust-seizing, formerly the 2 lower rings supplied were cast iron without chrome, so now you will have lower friction and longer life
I would recommend before fitting, you clean out your old grooves and hone your cylinder.
Compression tests on cylinders with adequate rings is about 120psi because this is a low compression engine (Vire 6 is slightly lower reading)
I would recommend replacing your rings if you had the piston seize hot or from rusting laid-up, or during refurbishing if there are vertical scratches in them where gas could seep through.
Assists reliable quick starting in damp conditions, correct running.
Please Note: Fitting requires cylinder removal
Standard sized pistons have "69.79" stamped on their crowns, I do have 0.5mm oversize pistons ("70.29" but 99% engines are standard
supplied with a fitting sheet to ensure you can fit them easily and without breakage as i show on youtube "vire piston ring"