Engine vibration. Causes?

**cajun66** · 03-15-2005, 10:06 PM

In the upper RPM range, the motor sufferes a noticeable vibration. Even in neutral.
I never noticed it until after I changed the bearings and such on the rear axle and changed the front sprocket. But how that would influence the vibration, I have no idea.

Anyone run into this before?

**dooner17** · 03-15-2005, 10:09 PM

Check the motor mounts possibly

**dblshockpower** · 03-15-2005, 10:19 PM

you might try and put the other sprocket back on as you may be overloading the motor.

**TimSr** · 03-15-2005, 10:28 PM

What machine?

**cajun66** · 03-15-2005, 10:28 PM

you might try and put the other sprocket back on as you may be overloading the motor.

1: I went the other way. I went from a 11t to a 10t. Taking a load off the motor.
2: It does it even in neutral.

**cajun66** · 03-15-2005, 10:30 PM

What machine?

The 185s. The 200 is completely dissassembled.

**HaggLE** · 03-16-2005, 08:26 AM

Check engine mounts are all tight as well as swing arm and shock. Also check the exhaust is bolted tight and doesnt have any cracks in it.

**83185s** · 03-16-2005, 05:57 PM

[QUOTE=HaggLE]Check engine mounts are all tight as well as swing arm and shock. Also check the exhaust is bolted tight and doesnt have any cracks in it.[/QUOTE

185s doesnt have swingarm and shock...they are a solid frame with front or no fron suspension...its either trailprotrailpro engine mounts, or the headbolts..mine used to do that alot when it was runnin...

**cajun66** · 03-16-2005, 09:24 PM

All motor mounts are tight and there is nothing loose that I can see. Maybe I'm just paranoid.

**TimSr** · 03-16-2005, 10:24 PM

A certain amount of vibration is normal. Aside from motor mounts, excessive vibration or an increase in vibration can be caused by anything that throws the motor out of balance, like a flywheel problem (rare), a bend or change in the crankshaft, especially were the flywheel connects, or play in the crank bearings.

**cajun66** · 03-17-2005, 06:15 PM

HOLY CRAP!!! I may have screwed up my motor on the 185 royally. I pulled the atc out today and decided to check the oil. Almost none! I feel so stupid. I added almost a quart of oil and that significantly reduced the vibration, but not completely. It still runs good and I didn't have any trouble starting it, so maybe it won't be too bad. But I'll be watching it like a hawk from now on.

**trikezilla** · 03-17-2005, 09:56 PM

does the 185S have a "lay down" motor like the 84 125m??

**cajun66** · 03-18-2005, 07:34 PM

Negative. It's almost upright.

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Engine vibration. Causes?