1 x ring ONLY (i also sell set of 3)
NEW stock 2023 - precision machined, tested over 10 years original size for "69.79" marked STD piston
("70.35" marked pistons were very rare like 5% and no longer available)
ring is chrome silver finish , can be used on any of your 3 gaps (less chance seizing)
50 Item Items
Warning: Last items in stock!
1 x Standard size Piston Ring for the Vire 7, 12 or Vire 6 BVR engines (Bright silver Chromed)
for vire engines with cylinder bore measuring <70mm (95% of them are original STD size)
(if your cylinder was STD like 95%, then the piston would be embossed "69.79" on top)
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"