Harley Jackshaft

Question Random grind when starting (Harley jackshaft pinion strongly hits the clutch´ ring gear) – Heritage Nostalgia 1993
My Heritage Nostalgia 1993, usually starts nice and strong, but sometimes when starting (engine either being both cold and warmed up) the jackshaft pinion hits the clutch ring gear and on second try it starts ok. Other times sounds and starts at the same time (seems the teeth hits a little, then engage before starting). This happens randomly but it´s very annoying when it does. Two years ago, I had the following parts replaced by a mechanic: new starter motor, new jackshaft pinion and new clutch ring gear. However, this happened from day one, very sparsely, as it´s still happening now. Being the starter motor brand new, don´t know what can be the cause. Electric system checked.

Answer You say it has been a problem from day 1. You mean, like, 1993? You need to determine if you are chasing an electrical issue or a mechanical problem. If your battery is weak, or low quality, you may be lacking amperage. That is the muscle in a battery. You might have an alignment issue. Is your inner or outer primary something other than stock? Sometimes if a jackshaft is over tightened, it will not move freely in it’s bushing. I know you said the ring gear was replaced. Was it installed correctly with the beveled edge facing in the correct direction? There are ring gears with less teeth that work really well. Try powering your starter with direct battery voltage. If engagement is better, you need to look at your wiring. Check your starter relay. You might be losing voltage somewhere. If the problem still exists, it is more likely to be a mechanical issue.

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