Oil light comes on during hard throttle

[Timbox]

Still getting used to the 86 1200, was runner her a little harder then I normally would.  Spinning up the RPM's around 75 and the oil light comes on.  Let off the throttle and the light goes out.  I pulled over and checked the oil and it was right on the top line. 

I am guessing that on a hard pull of the throttle the oil might slosh around a bit causing the oil light to come on?  That and maybe these bikes need a little more oil, fill the oil till the window is full?  I am getting ready to change the oil as I have the spin on mod that is going on too.  Thought I would check with the wealth of knowledge here and see what comes of my questions.

[red]

Still getting used to the 86 1200, was runner her a little harder then I normally would.  Spinning up the RPM's around 75 and the oil light comes on.  Let off the throttle and the light goes out.  I pulled over and checked the oil and it was right on the top line.  I am guessing that on a hard pull of the throttle the oil might slosh around a bit causing the oil light to come on?

Timbox,

Correct, the oil light is an oil level light, not an oil pressure light.  A float in the crankcase "reads" the oil level.  
Going steeply uphill and/or hard acceleration will cause the light to come on briefly.  No problem.

[aviationfred]

From what you have described, you have nothing to worry about. The oil level sensor is located in the oil pan on the left side. It is very common to have the oil level at the full line and have the low oil light come on under hard acceleration.

Here is what it looks like, #20 in the photo.

http://www.partzilla.com/parts/search/Yamaha/Motorcycle/1986/FJ1200S/ELECTRICAL+2/parts.html

A common cure for this is to add a few ounces extra, but maintain at least bit of air in the site glass


Fred

[racerrad8]

Here is a picture of the real thing.

Plus, I have it for $50.00 cheaper: Oil Level Sensor

Randy - RPM

[Timbox]

Thanks for the quick response on this weekend.  Glad that she is working as she should.  I will try to add a little oil and if that doesn't do the job I will pick up the new sensor from RPM.

[FJmonkey]

The sensor is good and doing a proper job. Consider this a Kookaloo light. Fill the oil to near the top of the sight glass (as already mentioned). More than that and you can't tell if you have over filled it. It will then have have plenty of oil in all conditions as long as one wheel is on the ground and you are still under some kind of control. Don't over think it, the FJ is a simple machine and will love you long time with good basic maintenance.

[Timbox]

Yes that oil trick worked great thanks again for the suggestion.

Today pulled the front calipers and removed the pistons, one on each brake pad nice.  I found why I was not happy with my front brakes.  I really cleaned up the calipers air and new DOT fluid all around the inside of the seal area.  Not only cleaned the pistons but also took them to my new polishing buffer wheel, that did a nice job on them.  Put fluid on the seals and put the pistons back in.  Now the brakes work wonderful and feel so much better. 

Still have to do something about these 86 front forks, they have to have something done to them.  Bikes runs so well now and is a job to ride, so have to take care of the front end to enjoy the twists a little more.