Harley Davidson Evolution Engine Problems

Harley-Davidson Evolution engine.

Harley davidson evolution engine problems. The Evo and Shovelheads filter on the return side of the pump on the way back to the oil tank and the TC filters on the feed side of. The engine design is often credited with saving Harley-Davidson from bankruptcy after the management buyout and subsequent reorganization that the company went through during the early 1980s. Working on a 31 year old Harley-Davidson Evo motor.

The actual design itself is designed poorly. In 1999 it was replaced by the Harley-Davidson Twin Cam 88 in the. Hondas new RC51 is a v-twin Ducati-killer.

The FXR handled well and was fast. Go to engine and oil pump and you will find the tappet screen and where it is. As of 2011 the Sportster remains the only model from the Harley-Davidson that still employs the Evolution engine in both 883-cc and 1200-cc variants.

Some of the exhaust bolts can also rattle free due to their design. DIY Harley motor repair. The main problem of the Twin Cam engine of the Harley Davidson is probably its the design aspect of the cam chain system.

The 1340-cc Evolution engine was used by all Harley-Davidson motorcycles built between 1984 and 1998 when it was largely replaced by the new Twin-Cam 88 engines. It is lockated near your oil pump on the rear of the right case. It played a vital role in reviving Harleys success when the company faced a huge crisis in 1984.

Answer 1 of 6. In my shop now is an EVO engine with a custom cam of just 500 lift it would have been most likely fine except extra long valve springs were installed that coil bound to the point of lifting the rocker boxes up and causing oil leaking on the rocker boxes. The Big Three will still be a force even if Detroit is in rough shape.