After driving the car the other day, the oil light started flashing, its a R1 2003, its still flashing oil level ok, was wondering if the sensor is broke or its something more ?.

Just to add it was blooming cold weather and maybe sludgy oil !.?.

Off out for a bit, hope to see a reply or two.

Joe

Happy New Year fellow locosters.

i have same problem with my 2001 R1 in my mnr. oil levels are fine, pressure perfect but oil level warning light always flashes. i was told it was one of the most common faults with the R1.

so do you think the sensors gone, have you still been driving as it is ?

Do you have a sump baffle fitted? Since fitting one to my 06 R1 my light comes on occasionally, it normally happens if ive been traveling at high speed/revs on a motorway and then slow down. My thinking why it does it is that the oil pump is pumping faster at high revs, and all the oil pouring back through the holes in the sump baffle around the sensor pushes the float downmaking the light come on??

Ive got some gauges to fit, and im going to drill/ tap the sump to fit them. When itake the sump off again to fit them im going to remove the baffle and drill a few holes around where the sensor goes to see if that fixes it

Mine comes on regularly. It's worse when the outside temp is low, I've just set off and the revs are high. Once it warms up it's better but can still come one with constant high revs. Presure remains constant and I've done at least one run of over 100miles with it on and several track days.

My theory is that it's partly to do with the level dropping as the oil returns to the sump (hence worse with cold oil) and the oil frothing at revs and the float on the sensor sinking.

Has your baffle plate got the "butterfly" shaped holes? I removed these and rounded the edges and that improved it. How much oil overfill have you got?

It's come up on hear a few times and I've seem the same thing on bike R1 forums.

adrian

im going to drop the oil out next and see, how much extra oil is it again once its filled to normal level, ive got a baffle plate fitted, i do think its to do with the cold though as it never did it at Oulton park and i was giving it loads.

Joe,
Drop Paul Rogers (progers) at u2u in case he doesn't see the thread. He raced a Phoenix with a 5PW motor so will likely know more than most.

The Yamaha oil level according to the manual is, run till warm then switch off and check. In a car instalation recomendations vary.

Least recommended I've seen is the above + 250ml.

More often recommended (and how I run mine) is oil checked with engine hot and running, with the level 3/4 the way up the glass. I then hold revs/blip hard, and check it drops just to the bottom of the glass.
Mines a 5VY though and I've modded the breather system as well. Mines also mounted at a slight angle unlike yours.

adrian

I would guess that the most likely cause is that oil is not draining back into the sump quickly enough, hence the low level light is triggered.

If you have one of the CNC machined baffle plates, open up the drain holes a bit more and if you can create a curve around the edge that promotes oil to drain downwards.

As for oil level - it should sit 2/3 to full on the sight glass when warm at idle.

Cheers

Paul

I am afraid i will not be able to help, but on our 2005 (5VY) engine, the oil level light is always on, we can't get rid of it... (Koso unit)
Weird, as it seems it is not fouling the floating switch, and the oil is to the top of the sight glass at warm idle, so surely enough oil, but even with just the ignition on, the light is on...
I have heard that others had the same issue with 5VY engines, so not sure if there is a fix... (any ideas?)

So we just check the oil level before each outing to be sure... and check the oil pressure and temperature gauges all the time...
Gergely

quote:

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Originally posted by progers
I would guess that the most likely cause is that oil is not draining back into the sump quickly enough, hence the low level light is triggered.

If you have one of the CNC machined baffle plates, open up the drain holes a bit more and if you can create a curve around the edge that promotes oil to drain downwards.

As for oil level - it should sit 2/3 to full on the sight glass when warm at idle.

Cheers

thanks for the info mate, i dropped the oil yesterday, was a little shy on amount so topped it up, light still flashing though, will take it out for a run once the snows gone.
Or may just take sump off and mahe some holes bigger and may cut butterflies off too ans Ady said


Joe

Paul

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The oil level sensor is above the baffle level so opening up the holes just makes sure the oil gets back to the sump and doesn't build up above it gettin frothed (is that a word?) up by the crank.

adrian