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DannoXYZ · November 27th, 2021, 07:30 PM

Harley used DOT-5 in their bikes 20-yrs ago before switching to DOT-4 when adopting ABS. DOT-5 really has advantages of high boiling-point along with long life-span, 5-yrs not uncommon. I've heard examples of 10-12yrs.

I don't think there's any OEM manufacturer that uses DOT-5.1 on street bikes, with or without ABS. Its high cost and short lifespan makes it suitable only for racing vehicles with frequent maintenance. Such as KTM's Africa Rally race-bike or Formulae-1 cars. Or with racing brake-upgrades such as Brembo for Porsches, Ferraris or pure race-bikes. I used it on my race-bike 1st season and it only lasted 1/2-season before needing replacement.

Going to Super DOT 4+ fluid makes much more sense with higher boiling point of 316C (600F). It'll go full year before needing fluid changes. Even BMW's limited edition HP4 race-bike with 3000-mile between needing engine-rebuild uses DOT-4 fluid.

Even so, if you're not racing bike, you won't notice difference and can use DOT-3 fluid for 2-yr life-span.

November 27th, 2021, 07:30 PM	#188
DannoXYZ ninjette.org certified postwhore Name: AKA JacRyann Location: Mesa, AZ Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot. MOTY - 2018, MOTM - Nov '17	Harley used DOT-5 in their bikes 20-yrs ago before switching to DOT-4 when adopting ABS. DOT-5 really has advantages of high boiling-point along with long life-span, 5-yrs not uncommon. I've heard examples of 10-12yrs. I don't think there's any OEM manufacturer that uses DOT-5.1 on street bikes, with or without ABS. Its high cost and short lifespan makes it suitable only for racing vehicles with frequent maintenance. Such as KTM's Africa Rally race-bike or Formulae-1 cars. Or with racing brake-upgrades such as Brembo for Porsches, Ferraris or pure race-bikes. I used it on my race-bike 1st season and it only lasted 1/2-season before needing replacement. Going to Super DOT 4+ fluid makes much more sense with higher boiling point of 316C (600F). It'll go full year before needing fluid changes. Even BMW's limited edition HP4 race-bike with 3000-mile between needing engine-rebuild uses DOT-4 fluid. Even so, if you're not racing bike, you won't notice difference and can use DOT-3 fluid for 2-yr life-span. Last futzed with by DannoXYZ; November 28th, 2021 at 02:09 PM.