Oil Consumption
Registered User
Joined: Dec 2001
Posts: 4,789
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From: Calgary, Alberta, Canada
Originally Posted by FormerH22a4,Apr 7 2005, 10:12 AM
planning on keeping yours?
Like Chris, I vtec a ton. Maybe that has something to do with it?
Registered User
Joined: Dec 2003
Posts: 725
Likes: 1
From: Calgary, Alberta, Canada
Any idea where the oil is going? Is it getting past the rings? Or is it being blown out a vent tube?
There is a new way of thinking when it comes to breaking in the new crop of 4-stroke motocross bikes that have popped up in the last few years. They are 250cc and 450cc bikes which are borderline single cylinder formula one engines. The preferred way to break them in is to ride 'em like you stole them the first time you throw a leg over them. Essentially, a hard break-in is used to ensure that the piston rings seat properly with the cylinder wall. We (being all of us over at ThumperTalk.com) found that those guys who babied their bikes for the first few rides were going through oil quite quickly for the life of the piston in that bike. When they did a top end and threw in a new piston/ring combo, broke it in hard, the oil consumption was gone. In fact, most of the more respected race engine builders on the board recommend putting the piston into the cylinder DRY (no oil). The cylinder itself has a ton of oil jets to lube the underside of the piston while running, but that split second when it's dry on first starting up can do wonders to ensuring a tight seal of the rings.
Me, personally, I just got a new 250 and tried the hard breakin, and it worked like a charm. The power is all there and it doesn't consume any oil at all. I'm waiting on two new exhaust valves for my 450, and when that arrives, I'll be putting an entire new top end in it. I'll be giving the dry piston/cylinder build-up a try.
So, I certainly don't know if that theory could apply to the S2000 engine, but really, a CRF450 motor is not far off from an AP1 motor. How was your car broken in? Hard? Soft? Me, I have no idea since I'm the third owner, but I'd be curious to hear what others have to say on the subject that know the history of their cars.
Chris.
There is a new way of thinking when it comes to breaking in the new crop of 4-stroke motocross bikes that have popped up in the last few years. They are 250cc and 450cc bikes which are borderline single cylinder formula one engines. The preferred way to break them in is to ride 'em like you stole them the first time you throw a leg over them. Essentially, a hard break-in is used to ensure that the piston rings seat properly with the cylinder wall. We (being all of us over at ThumperTalk.com) found that those guys who babied their bikes for the first few rides were going through oil quite quickly for the life of the piston in that bike. When they did a top end and threw in a new piston/ring combo, broke it in hard, the oil consumption was gone. In fact, most of the more respected race engine builders on the board recommend putting the piston into the cylinder DRY (no oil). The cylinder itself has a ton of oil jets to lube the underside of the piston while running, but that split second when it's dry on first starting up can do wonders to ensuring a tight seal of the rings.
Me, personally, I just got a new 250 and tried the hard breakin, and it worked like a charm. The power is all there and it doesn't consume any oil at all. I'm waiting on two new exhaust valves for my 450, and when that arrives, I'll be putting an entire new top end in it. I'll be giving the dry piston/cylinder build-up a try.
So, I certainly don't know if that theory could apply to the S2000 engine, but really, a CRF450 motor is not far off from an AP1 motor. How was your car broken in? Hard? Soft? Me, I have no idea since I'm the third owner, but I'd be curious to hear what others have to say on the subject that know the history of their cars.
Chris.
