Update on oil consumption

[MadMax]

Sport bikes use a heavier oil for starters. But on the other hand the oil in bikes do double duty. They lube the gears. So you would think that it would even out. I have a seca 750-1981 with 53,000 miles on it. I don't ever need to add oil between oil changes???? It must have something to do with the breather system. I hope my vector won't be an oil burner. Hmmmmmmmm. That would "SUCK" I know I'm sticking with the new 0-30w from yammie. I'll be breaking my sled in somewhere between the manual and the I stoled it methods. MM.

 

[spray25]

My experience with my 03 RX1 shows it definitely consumes more oil when I run for long periods of high rpm operation such as 50+ miles at 70 - 80 mph on the rail beds in Quebec. When I ride only on the narrower, tight twisty trails of northern NH, the oil consumption is very difficult to measure it's so small. My question is why is this engine behaving this way? Over the summer, I ran my Kaw. zx-11 bike under similar conditions - ran it in a lower gear than normal so the rpms would be much higher while cruising. I hoped to simulate the sustained high rpm operation for many miles. I put 1700 miles on the bike with NO oil consumption. The bike has 3200 miles on it and my RX1 has 7000 miles on it. There has got to be something about the combination of the low air temp and the setup of the RX1 engine (thermostat temp., ring land clearance, etc.) which is causing this problem. I've spoken to dozens of owners of sportbikes and sportbike shops over the summer and nobody complains of consuming oil. Some of the owners have beaten the $#@% out of the engines from the first mile and some of them have never hit 7K rpm. It's a puzzling problem!!!!

This is similar to my experiences. On the ocassional long trail ride where I am at sonstant high speeds/rpms I use quite a lot of oil. About a quart, in under 100 miles. While on a normal mountain riding trip I can go several hundred miles with no noticable oil use.

I tore down my motor to put in LC pistons. The rings were ALL well within spec.

Bender has just recently changed the size of their oil restrictor. I believe this to be the major contributor to my oil use. When I took everything apart I had oil in my airbox etc that had been getting by the turbo's seals.

I'm with Uncle Buck about crankcase venting. I think there is a problem there too.

 

[snowbeast]

pcv valve

Guys,maybe some of you remember my oil usage,from 03-04 and i used freedies air mod,to boot,the mod worked great,but it did force more crank pressure,i went out and found a automtive pcv valve that fit in the line and it helped greatly,i am just passing this on,from my problems,give it a try,it does work. Pete