Exhuast leak - Page 2

tigmaster · 02-19-2008, 09:32 PM

Yes, that is what they are suggested to run stock at. You can however safely run up to 40:1 mineral and 50:1 synthetic. You have to rejet. My rm80 was said to run at 20:1. Well, I switched to 40:1 and it was crap until I got around to rejetting it and it was super responsive with no damage to the cylinder, I checked.

gscx · 02-19-2008, 09:35 PM

i have a 2 stroke, and the whole reason people run it with less oil is because of less friction, and the oil is just there to cool the engine, it doesnt have anything to do with the air fuel mixture

gscx · 02-19-2008, 09:36 PM

and the reason your rm was told to run a 20:1 is because oil back then was not that good and it didnt protect as well

tigmaster · 02-19-2008, 09:41 PM

.....Do you realize what you are saying? Lets logically think through this. Say we have a bike running 32:1.... Now that means that for every spray of gas into the engine, 32 parts are gas and 1 part is oil. Now lets say you switch to 50:1.... You have the same amount of oil/gas entering the engine yet 50 parts are gas and 1 part is oil. This means you are putting MORE gas into your engine. Now if your engine was dialed in at 32:1, now almost doubles the amount of gas that it is jetted to run at. This means a richer engine. The friction produced by the oil has nothing to do with why you get performance from a leaner oil/gas mixture. Also, if the oil is just there to cool the engine, why don't they just beef up the cooling system and let that piston scrape hard against the bore from straight gas in the engine? That would be environmentally better so why don't they just put bigger radiators on there and not lubricate the piston and crank? And oil producing friction, didn't they specifically design oil to reduce friction??? This is not even an argument.

gscx · 02-19-2008, 09:50 PM

hmm i guess with you its not

tigmaster · 02-19-2008, 09:51 PM

I am not sure what that means, but to hold true, I will find some data backing my side.

tigmaster · 02-19-2008, 10:03 PM

Ok, this first article backs what I was saying about 2 strokes requiring oil as a lubricant, not solely as a coolant.
New Invention Available for License: Two Stroke Engine With A Dedicated Crank Oil System And Variable Ram Blower
This page also backs that.
Two-Stroke Basics | Energy & Utilities > Utilities Industry from AllBusiness.com

I will get you more info, but that should be enough to disprove your cooling theory.

MattCA · 02-20-2008, 10:01 PM

Wait I need help on which gaskets real quick lol. I went to bike bandit.com and found out I need a "rubber" for the connection of the two pipes part #72326-001 but whats the seal between the expansion chamber and the motor?

tigmaster · 02-20-2008, 10:17 PM

A lot of bikes don't even have a gasket. If they do, they are not a copper washer like 4 strokes, they are usually a viton o-ring.

gscx · 02-20-2008, 10:21 PM

you should replace them all

02-19-2008, 09:32 PM	#11 (permalink)
tigmaster Administrator Join Date: Aug 2006 Location: Missouri, United States Posts: 7,526 iTrader: (1)	Yes, that is what they are suggested to run stock at. You can however safely run up to 40:1 mineral and 50:1 synthetic. You have to rejet. My rm80 was said to run at 20:1. Well, I switched to 40:1 and it was crap until I got around to rejetting it and it was super responsive with no damage to the cylinder, I checked. __________________ --'03 CRF450r-- --FMF Pipe, Pro-Tech Revavle-- --Vortex Basket With Tusk Disks And HP Springs-- --Pro Taper Triple Clamps And Bars-- --Devol Full SP With Moose HGs-- --Renthal 13/50 With R1 Chain-- --Now It Is The End, Probably...-- --'06 CBR F4I-- --Bone Stock-- Check Our Latest How-To Here

02-19-2008, 09:35 PM	#12 (permalink)
gscx Pro Mototips Member Join Date: Aug 2007 Location: bridgeville DE Posts: 2,230 iTrader: (0)	i have a 2 stroke, and the whole reason people run it with less oil is because of less friction, and the oil is just there to cool the engine, it doesnt have anything to do with the air fuel mixture __________________ Sold

02-19-2008, 09:36 PM	#13 (permalink)
gscx Pro Mototips Member Join Date: Aug 2007 Location: bridgeville DE Posts: 2,230 iTrader: (0)	and the reason your rm was told to run a 20:1 is because oil back then was not that good and it didnt protect as well __________________ Sold

02-19-2008, 09:41 PM	#14 (permalink)
tigmaster Administrator Join Date: Aug 2006 Location: Missouri, United States Posts: 7,526 iTrader: (1)	.....Do you realize what you are saying? Lets logically think through this. Say we have a bike running 32:1.... Now that means that for every spray of gas into the engine, 32 parts are gas and 1 part is oil. Now lets say you switch to 50:1.... You have the same amount of oil/gas entering the engine yet 50 parts are gas and 1 part is oil. This means you are putting MORE gas into your engine. Now if your engine was dialed in at 32:1, now almost doubles the amount of gas that it is jetted to run at. This means a richer engine. The friction produced by the oil has nothing to do with why you get performance from a leaner oil/gas mixture. Also, if the oil is just there to cool the engine, why don't they just beef up the cooling system and let that piston scrape hard against the bore from straight gas in the engine? That would be environmentally better so why don't they just put bigger radiators on there and not lubricate the piston and crank? And oil producing friction, didn't they specifically design oil to reduce friction??? This is not even an argument. __________________ --'03 CRF450r-- --FMF Pipe, Pro-Tech Revavle-- --Vortex Basket With Tusk Disks And HP Springs-- --Pro Taper Triple Clamps And Bars-- --Devol Full SP With Moose HGs-- --Renthal 13/50 With R1 Chain-- --Now It Is The End, Probably...-- --'06 CBR F4I-- --Bone Stock-- Check Our Latest How-To Here

02-19-2008, 09:50 PM	#15 (permalink)
gscx Pro Mototips Member Join Date: Aug 2007 Location: bridgeville DE Posts: 2,230 iTrader: (0)	hmm i guess with you its not __________________ Sold

02-19-2008, 09:51 PM	#16 (permalink)
tigmaster Administrator Join Date: Aug 2006 Location: Missouri, United States Posts: 7,526 iTrader: (1)	I am not sure what that means, but to hold true, I will find some data backing my side. __________________ --'03 CRF450r-- --FMF Pipe, Pro-Tech Revavle-- --Vortex Basket With Tusk Disks And HP Springs-- --Pro Taper Triple Clamps And Bars-- --Devol Full SP With Moose HGs-- --Renthal 13/50 With R1 Chain-- --Now It Is The End, Probably...-- --'06 CBR F4I-- --Bone Stock-- Check Our Latest How-To Here

02-19-2008, 10:03 PM	#17 (permalink)
tigmaster Administrator Join Date: Aug 2006 Location: Missouri, United States Posts: 7,526 iTrader: (1)	Ok, this first article backs what I was saying about 2 strokes requiring oil as a lubricant, not solely as a coolant. New Invention Available for License: Two Stroke Engine With A Dedicated Crank Oil System And Variable Ram Blower This page also backs that. Two-Stroke Basics \| Energy & Utilities > Utilities Industry from AllBusiness.com I will get you more info, but that should be enough to disprove your cooling theory. __________________ --'03 CRF450r-- --FMF Pipe, Pro-Tech Revavle-- --Vortex Basket With Tusk Disks And HP Springs-- --Pro Taper Triple Clamps And Bars-- --Devol Full SP With Moose HGs-- --Renthal 13/50 With R1 Chain-- --Now It Is The End, Probably...-- --'06 CBR F4I-- --Bone Stock-- Check Our Latest How-To Here

02-20-2008, 10:01 PM	#18 (permalink)
MattCA C Rider Join Date: Oct 2007 Posts: 66 iTrader: (0)	Wait I need help on which gaskets real quick lol. I went to bike bandit.com and found out I need a "rubber" for the connection of the two pipes part #72326-001 but whats the seal between the expansion chamber and the motor?

02-20-2008, 10:17 PM	#19 (permalink)
tigmaster Administrator Join Date: Aug 2006 Location: Missouri, United States Posts: 7,526 iTrader: (1)	A lot of bikes don't even have a gasket. If they do, they are not a copper washer like 4 strokes, they are usually a viton o-ring. __________________ --'03 CRF450r-- --FMF Pipe, Pro-Tech Revavle-- --Vortex Basket With Tusk Disks And HP Springs-- --Pro Taper Triple Clamps And Bars-- --Devol Full SP With Moose HGs-- --Renthal 13/50 With R1 Chain-- --Now It Is The End, Probably...-- --'06 CBR F4I-- --Bone Stock-- Check Our Latest How-To Here

02-20-2008, 10:21 PM	#20 (permalink)
gscx Pro Mototips Member Join Date: Aug 2007 Location: bridgeville DE Posts: 2,230 iTrader: (0)	you should replace them all __________________ Sold

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