How to switch to Premix?

[RydinHi]

I know im going to have this ring stick problem unless i go to premix..... my question is how do convert to this? I just bought Redline 2 stroke race oil, can I use that? And if i do convert, when i go to the gas station, can i just dump the oil in and fill my tank? How do you guys do it?

[Zombie-Stomp]

You can go to the gas station, put your oil in, and then pump a gallon to make the ratio right. Not sure if you'll NEED to, but will want to remove the oil pump, in case lack of oil will damage it, plug your oil hosebarb that is on the carb, and remove your oil tank and hoses, and save all removed items if you decide to go back. You may be able to simply let the oil tank get low and start premixing and stop filling the oiltank.

[pinkymingeo]

Pull the oil pump. A pin holds the drive gear in place. Remove the drive gear, then replace the pump to plug the hole.

[XPS1210]

the is a how to on this in my "Jered's how to" area

[Zuma-Zuma]

Why not just remove the pump's output line from the port, plug the port and the line, and leave the pump and cables in place? It will be easier, since you may get sick of pre-mixing.

Also, I used to try and do the in-tank premix method. It doesn't work that well. If you put oil in first, alot runs to the line, and on start up, you'll run very rich for a few miles.
Also, you have to guess as to how much fuel will fit to get the ratio correct.

[PreBug308]

Don't gas station pumps tell you how much fuel your putting it? Yep, I believe they do.

[Lennox]

2 things



If you do not want to go through the oil pump removal (for whatever reason) Just take the output hose form the oil pump, attach it to the input of the pump, and viola your pump will always flow the oil from in the lines.



About premixing at the gas station...... Keep "pre-filled" 3.2 oz bottles under your seat. One bottle for one gallon of gas. Either put the oil in first, and then the flow of the gas will mix it real good, or add your 1 gallon of gas first, then add the oil and shake bike back and forth a few times.

[Zombie-Stomp]

Don't gas station pumps tell you how much fuel your putting it? Yep, I believe they do.

Well, you don't always run into that gas station right at the exact moment that you can fit an entire gallon, do you? My tank holds 1.4 gallons, and it's a bit nerve racking wondering if I'll get there when I'm on empty. Not to mention a pain in the @$$ pushing it to the station when I don't get there. I rather like filling my tank as full as I can no matter how much I needed it, and not just how much my ratio calls for. That's why I don't and won't premix. That, and I think there's little to be gained from it.

[Zuma-Zuma]

That was the point I was trying to make, Z-Stomp. Glad at least somebody got it. I will still never tank mix, I had the experience, been there, done that. Is the concept of premix that the premix pumps "pump" too much oil? And if so, aren't they adjustable? Could you just dilute the oil in the pump res.? A little math should net you what ever ratio you want........or not

[Zombie-Stomp]

.....Is the concept of premix that the premix pumps "pump" too much oil? And if so, aren't they adjustable? Could you just dilute the oil in the pump res.? A little math should net you what ever ratio you want........or not
Wait, this part you meant to say that if the INJECTOR pumps too much oil, that you could dilute the oil with gas in the oil tank if that was the case? Or did I miss something?

[PreBug308]

Well, you don't always run into that gas station right at the exact moment that you can fit an entire gallon, do you? My tank holds 1.4 gallons, and it's a bit nerve racking wondering if I'll get there when I'm on empty. Not to mention a pain in the @$$ pushing it to the station when I don't get there. I rather like filling my tank as full as I can no matter how much I needed it, and not just how much my ratio calls for. That's why I don't and won't premix. That, and I think there's little to be gained from it.

Fully, fully agree with you. That and supposebly the prebug oil pump is super reliable.
:ll

[Zuma-Zuma]

Zombie, I was refering to why, when everybody gets to a certain "stage" while modding, that they go to pre-mix. I also read somewhere that they do it because the pump pumps too much oil, and pre-mixing gives them a constant ratio across the board. I agree with leaving the pump.

The part about diluting oil in the res. was my little addition. While it may sound good in theory, please don't do this ;no . I tried to do it on a little motorbike, and I put octane booster in the pump res., and premixed in the tank. :angry: The end was ugly, but I was young and learning.

[florida derbi rocket]

I'm From the Old school Motocross....I take a ride on a saturday morning and fill up a 1 gal and a 2.5 gal red plastic tank...my back yard is my fill-up station....I always have pre-mix for my weedwacker and my Scooter.....Im gonna buy a 5 gal and have 5 gal of pre-mix soon..Ive dealt with the Derbi/Crank gear Oil pump...and the Piaggio belt driven pump..Ive decided to eliminate a possible failure point....I Hate the crowded Gas stations near my house...and Ive only ran out once..when I was having too much fun to watch the tank.

[RydinHi]

Sounds like a plan, im gonna take the pump out, the injection is pumping to much oil and my piston is gettin gunked up and alot of blow by... Ive been into motocross so even if my tank is half empty i have a small container that shows how many oz's your putting in..... I will probably keep all the old stuff just incase I want to sell the scoot later on, cant wait to get my parts this week and finish this project up, gonna go camping & im bringin the scoot with me for some good old trail riding and exploring. :drum:

[zuma ned]

how reliable is the pre 2001 injector at stage 2. i dont mind premixing but seeing as there is no underseat storage i cant keep a small bottle on hand for when i have to refil away from home.

[speedy_scooter]

if you want to be able to have some extra premix just take a 24oz. soda bottle and fill that. if you run out that bottle should be able to get you to a gas station.

[RydinHi]

if you want to be able to have some extra premix just take a 24oz. soda bottle and fill that. if you run out that bottle should be able to get you to a gas station.

Or just blow up under your seat..... the pressure might pop the soda bottle... or not? :confused: but it is a good idea if safe.

[zuma ned]

yea, but where would i put the soda bottle.

[speedy_scooter]

i highly doubt that if you leave a bit of airspace in the bottle taht it would explode then catch fire on the motor. as for where to put it just stick it under your seat in the helmet box.

[zuma ned]

thats my problem. i have a 2001 zuma which dont haven any spaces under the seat, if i did i would be able to keep a bottle of oil under the seat to premix with.

[speedy_scooter]

can you take a pic of your under seat or does your seat not openup?

[zuma ned]

yep, sure.

[speedy_scooter]

thanks cuz since i dont have a prebug i really dont know what your situation is with underseat storage.

[PreBug308]

Its a gas tank, a battery, an oil tank, and a seat latch. No storage whatsoever.

[tbone]

When I went 70cc I used a piece of advice from this forum. I left the oil injection stock and functional and then I put a capfull or two of 2 stroke oil in my fuel tank when I fil up. Not real precise but its worked well.

[speedy_scooter]

wow, i guess prebug owners got the short end of that one then. i guess then you could always just strap the bottle with a bungee cord to the rack.

o yea i remember now why prebugs dont have any space, they have the veritcal engines!wasnt really thinking on that one. :dance:

[zuma ned]

yea lol. i may make a custom box at the front where you put your feet, make it out of fibreglass and make it big enough for a small bottle of oil.

[Zuma-Zuma]

Do what the old school drag racers do. Use an old quarter barrel, put it on the rear rack. Should hold 7.5 gals of premix, and make for great wheelies.

[Sidewinder]

Lennox quoted that filling 3.2 oz botles of oil for a gallon of fuel and have another marked for half gallon.It works! A pain in the tail but after seizing a engine that cost you pretty pennies it's worth the hassle when your running high RR's.It happened to me and this new motor there is pump is sitting in a ziplockand that's what it's worth!
I think a good ratio mix would be 32:1 depending on the oil.
Good luck