Harley Davidson Engine Vibration

Introducing the Predator engine mount system for Harley Davidsons Evolution engine Dyna range of bikes.

Harley davidson engine vibration. Ironically the bikes lack of vibration caused problems. The swingarm of this bike in fact is rigidly linked to the engine as in many other motorcycles and they are connected to the frame by elastic supports. It is smooth downshifting above 2k rpm but when decelerating off the throttle and engine breaking in the 1500-2000 rpm range there is a lot of vibration.

Harley-Davidson issued service bulletin a while back that changed the procedure for tightening the compensator nut after a spate of bikes had problems with this nut working loose. The enormous weight is thrown around as these pistons move back-and-forth leading to the vibration you feel in the motorcycle. This new exhaust has thrown the engine way out of tune and the carbs need to be re-set up as the bike is now running very weekyou will burn a hole in a piston very soon if you dont re-tune itthis could also be causing some if not all of the vibration your getting but check the sprokets are running true life the rear of the bike clear of the ground and spin the rear wheel if you feel or here a grinding sound its the.

Once above this level the bike smooths out due to the change in frequency of the vibrations. The combustion that results creates a Torque Spike from an extremely rapid rise in cylinder pressure. Aside from frequent oil leaks and other problems with the Night Trains V-Twin the bikes flaw is its poor steering.

With a 30-percent stiffer frame and a 90-percent reduction in engine vibration the Heritage along with the rest of the 2000 Softail range was a revelation exceeding all expectations. Harley Davidson Forums A forum community dedicated to all Harley-Davidson model owners and enthusiasts. With all these problems Harley decided to finally discontinue the Night Train in 2010.

If it does not go away then it is not engine related. When accelerating though the gears and decelerating back down if the engine rpms gets below about 2000 rpms youll feel the vibration. The most important cause we found was due to the design of the Harley-Davidson crankshaft.

I went to the dealer and there was a customers 03 V there stock with SE pipes and it had the same vibration mine did at 4000 rpm although I dont think it was quite as bad as mine but I think its fairly normal and it may me a persons perception of how bad a vibration a bike has. The vibration of the engine amplifies through the rubber the soft vibration spreads throughout the motorcycle the engine and the car body feel a shake and the appearance also shakes greatly. No vibration at idleNone at acceleration.