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Post by jdl357 on Apr 24, 2016 16:52:18 GMT -5
I'm going to start pre-mixing, so I'm wondering if I can fill my tank up and then pour the right amount of oil in, or do I need to mix in a separate container and then put it in the tank?
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Post by ryan_ott on Apr 24, 2016 18:08:59 GMT -5
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Post by PIG on Apr 24, 2016 18:23:20 GMT -5
I'm a mix on the go guy, and never had an issue.
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Post by niz76 on Apr 24, 2016 19:19:27 GMT -5
I do both and no issues here either. When mixing on-the-go I always make sure my tank is empty enough to accept exactly one gallon and then pour the oil in afterward (I use 3 oz.). I then shake the bike like I'm mad at it! For good measure I'll wobble the wheel a little when I'm taking off to further slosh it around...
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Post by ThomasTPFL on Apr 25, 2016 1:04:53 GMT -5
On my bikes that require premix I just pour the appropriate amount in after pumping. My moped tank won't take a full gallon. Math is involved. It's not hard to multiple 2.56*xgallons though when my phone has a calculator. I always make sure to err on the side of a fat mix.
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Post by stepthrutuner on Apr 25, 2016 2:49:42 GMT -5
I always preferred to add the oil first and let the addition of gas mix it in. I mainly used straight petrolium oil and mixed at 32:1. One oz/.25 gal. Simple.
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Post by 90GTVert on Apr 25, 2016 7:45:30 GMT -5
If I'm filling up a can, I add enough oil for the gas I plan to add since I know how much I'll be using. If I'm on the go, I fill the tank and then add oil, shaking the scoot a bit as I add the oil, because Saber Pro is thick and I've had issue a few times with part of it ending up in the fuel line otherwise. Just remember not to top it all the way off so you have room for a little oil.
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Post by gsx600racer on Apr 26, 2016 0:54:20 GMT -5
I was premixing a gallon at a time, yeah it got old after awhile. Now I mix 5 gallons at a time. My favorite container is the "No Spill" brand. I like the fact you can fill your tank(without paying attention) and not spill a drop or make a mess. The only down side is they are on the pricey side. I keep this in the storage compartment with the cover taped up.(for on the road fill-ups) I filled it with 4oz of oil for 1 gallon of gas(32:1).  I also use this container for the rides that might exceed the gas tank range and where I might be a tad away from civilization(gas stations). Its refilled with my preferred gas and oil mix. I figure if this container is good enough to sit on the store shelves, should be safe enough for under the seat.  I am working on a foam insert that will fit under the seat and will support the container (standing up) for peace of mind riding. |
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Post by jdl357 on May 3, 2016 17:13:02 GMT -5
What oil / gas ratio would you guys recommend for my 72cc engine running regular (not synthetic) 2 stroke oil?
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Post by ThaiGyro on May 3, 2016 20:10:37 GMT -5
JDL...not sure about todays preferences. I came from the oil & gas business. In my racing days, we broke in new rings with Castrol original oil...which was and still is castor oil with some quick burn additives. After seating the rings, most people switched to as synthetic. Just FYI...
The ratio is really determined by many factors. Ambient temperature...humidity...the oil...timing curve...port timing and chamber design. All have varying effects on what you really need at any given moment.
Most people find and use a ratio that burns clean, prolongs plug life and performs. To give you a range...air cooled racing 2-strokes in the 70's were 16:1, up to 20:1, but timing advanced toward detonation, even with huge carbs & main jets and colder plugs.
Todays bikes can be run anywhere from 25:1 down to 40:1 ratios, again, depending on the many factors. If you read these pages, I think you can get a good picture, but find an expert in your area is my advice.
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Post by jdl357 on May 3, 2016 20:20:09 GMT -5
Thanks for the info thaigyro. 16/1 ! I had no idea you could put that much oil in! From what I've read on this site everybody pretty much tells me between 32/1 and 40/1. I think I'll go with 32/1 just to be safe.
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Post by Lucass2T on May 4, 2016 2:45:04 GMT -5
I can run my 70mph Axis without any direct issues 50:1. I don't know how the mix ratio influences wear on the long run but you won't seize or overheat a healty engine with a 50:1 ratio thats for sure. Certainly not with a cast iron kit, they don't get that hot and cast iron has self lubrication characteristics (like teflon for example).
Bell writes in his book a real fat mixture gives more power, but downside is it will also foul the plug and exhaust(port). Myself I mix at 40:1 and that worked great for the last 2500kms since I rebuilt the engine after a wristpin bearing fail.
So with current oil technology i'd say mix 40:1 and you're safe.
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Post by stepthrutuner on May 4, 2016 2:54:37 GMT -5
From my observation, modern oils having detergent additives, extra oil seems to prevent carbon buildup rather than causing it. Racing oils could be different where frequent teardowns are expected and common.
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Post by Lucass2T on May 4, 2016 5:51:09 GMT -5
From my observation, modern oils having detergent additives, extra oil seems to prevent carbon buildup rather than causing it. Racing oils could be different where frequent teardowns are expected and common. I dunno man...im probably lacking experience but id say they only slow it down. I've never seen a two stroke with clean exhaust ports or exhaust header. Maybe 190mech can chime in here? |
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Post by stepthrutuner on May 4, 2016 13:47:17 GMT -5
My TP Trophy has a special coating (paint?) on the xfer tunnels and ex. prt. Hense, I have resisted grinding on them to preserve the finish. This could be some of the reason the ex. prt. stayed so clean @ 32:1 - 24:1 mix ratios. However, the uncoated piston top looked practically as clean as when assembled after some 3000 mi. of hard running using cheap mineral oil. <$4/qt. - Havoline, Wal Mart & Mercury all-purpose. I was a pauper at the time.
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