The tool

Check my bike

One bike, five jobs. Check any oil against the manual's spec, see the pad shapes and compounds that fit, the brake fluid and coolant it calls for, and the chain and gearing it left the factory with — every fact sourced and dated.

Pick a bike above, then a job tab — oil verdicts, pad shapes, fluids and chain data all render here. With JavaScript off, the flagship summary below still shows what each bike's manual asks for.

Oil capacities are the manufacturer's with-filter-change figure, not the dry-rebuild total that circulates online. Always verify against your own owner's manual before you turn a wrench — this is educational reference, not a repair procedure.

Reading the verdict

What the oil tiers mean

SafeMeets your bike's spec as written: viscosity in range, JASO class registered.

ConditionalLegal, but with a caveat you should read — an unregistered claim, or a class one sub-band off.

NoFails a hard gate: wrong JASO class, energy-conserving, or a banned additive. Not a judgment call.

Climate

On viscosity and heat

A heavier grade that's still inside your manufacturer's own temperature chart is a legitimate choice for sustained heat or hard track use — not a hack, and not an upgrade. Outside that chart, nobody with an engineering stake in your engine backs it. The oil check only clears grades your manual's chart already allows.

Flagship summary

What five flagships ask for

Bike	Viscosity	JASO / API
Yamaha YZF-R1	10W-40	MA · API SG
BMW S1000RR	5W-40	MA2 · API SJ
Kawasaki Ninja ZX-10R	10W-40	MA · API SG
Suzuki GSX-R1000	10W-40	MA · API SJ
Honda CBR1000RR	10W-30	MA · API SG

Every oil verdict is checked against the JALOS JASO T903 registered-oil list — the registry that says whether an oil's JASO claim is filed, not just printed on the bottle.