need transplat advice

mojobuddy70cc · Post by **mojobuddy70cc** » Fri Nov 20, 2009 4:08 am

,,so i want to drop the engine out of the rat i have, ( 492mi), and put it in the basement out of the weather. i`m putting seafoam in the gas and running it first for about 10 minutes.,, then dropping and disconnecting verything, wrap the hoses.wiring and zip tie in bags, put the engine in a couple big garbagebags and a box, also spray it lightly on the carb and exhaust port with air filter oil,,
,,what else?
thanks

Ray Knobs · Post by **Ray Knobs** » Fri Nov 20, 2009 4:40 am

not sure i would put the engine in a plastic bag

maybe plug the carb / exhaust holes with rags and give it a coat of wd-40

mojobuddy70cc · Post by **mojobuddy70cc** » Fri Nov 20, 2009 4:58 am

ray it looks like the only mod i will do is the 21mm card, it had no exhaust so i bought a GY6 125 pipe, ( my bud has it on his Lammy 80cc), it might take a lil mod and a bracket fab.,, but all in all the engine is tight and not broken in, i need to read the break-in,, but i`m sure it was dogged out when stolen ( kid next door took it for a joy ride and ditched it) along wif some parts for more dope.
,, anywho i don`t wanna loud ass prima on it like i saw on utube, uggh.
hope to have it on the road ina couple week aafter the big swap.
is the oil pump gonna keep up and how does that work on a 110? is it a vac/draw from the carb?
thanks

bigbropgo · Post by **bigbropgo** » Fri Nov 20, 2009 4:59 am

Its easy to take the carb off and drain it fully. Pull the bolt on the float bowl. probably make sure the motor stays upright. I know there isn't a lot to re-connect but I am personaly forgetful and try to label stuff or snap a pic. Bolts and bits in a labeled zip lock. Wd-40 was a good suggestion also.

mojobuddy70cc · Post by **mojobuddy70cc** » Fri Nov 20, 2009 10:04 am

, i also need to find a rear wheel for the rat the one i on it is dinged up bad,
any good sources?? is it a wide 10in? or a 12in,looks like a 12?

Ray Knobs · Post by **Ray Knobs** » Fri Nov 20, 2009 2:14 pm

tire or rim?

Duro makes some nice offroad style tires if you don't want to go back to stock.

If you want stock i'll take mine off and sell em cheap so i can buy me some duro's

That prima pipe is LOUD. Everyone turns there head, jumps out of the way, or gives me a thumbs up. the problem with running a pipe made for a 4s engine is that it isn't shaped correctly. The design of the pipe is important to the performance of a 2s, it's not just to reduce the noise.

Ray Knobs · Post by **Ray Knobs** » Fri Nov 20, 2009 2:17 pm

Ray Knobs · Post by **Ray Knobs** » Fri Nov 20, 2009 2:23 pm

mojobuddy70cc wrote:, i also need to find a rear wheel for the rat the one i on it is dinged up bad,
any good sources?? is it a wide 10in? or a 12in,looks like a 12?

120/70/12 up front and 130/90/10 out back.

Keys · Post by **Keys** » Fri Nov 20, 2009 5:35 pm

Hate to tell you, but you are planning to use a 4-stroke pipe (for a GY6) on a 2-stroke engine. 4-strokes don't require the amount of back pressure to operate properly that a 2-stroke does. That's why an expansion chamber is so important...it creates the required back pressure. You MAY hurt the engine by using a 4-stroke pipe.

--Keys

mojobuddy70cc · Post by **mojobuddy70cc** » Sat Nov 21, 2009 3:11 am

,, you are right it would damage the engine eventually, but you can drill out the restrictor plate, i have a bud in my scooter club w/a Lammy (88cc kit) uses the same pipe wif a drilled plate, not nearly as loud, you can`t stand that prima noise, and there are noise ordances since i ride in the city, if it does`nt work out i will just have to buy stock or keep pay $60 to replace the silencer.

B02S4 · Post by **B02S4** » Sun Nov 22, 2009 5:25 pm

I would not wrap the engine in plastic. It is a good idea to line the box in plastic & cover the engine/box with something that will breath, like an old cloth shirt or something.

If you want to get fancy, before you pull the motor you could fog the motor (boat shops have fogging oil), pull the airbox, start the motor, & spray the fogging oil in the the carb until the motor dies.

Definitely drain the float bowl before putting the engine in the storage box.

Ray Knobs · Post by **Ray Knobs** » Sun Nov 22, 2009 11:56 pm

fogging is a good idea

you can do it the cheap way, reach in turn the oil pump all the way up, run it till it dies

B02S4 · Post by **B02S4** » Mon Nov 23, 2009 1:46 am

Ray Knobs wrote:...reach in turn the oil pump all the way up, run it till it dies

How specifically does one "turn the oil pump all the way up"?

Ray Knobs · Post by **Ray Knobs** » Mon Nov 23, 2009 3:41 am

it's controlled by a cable that is attached to the throttle, find the linkage and pull

mojobuddy70cc · Post by **mojobuddy70cc** » Mon Nov 23, 2009 4:16 am

,, sprayed big rags w/ filter oil and put it in a heavy carboard box,,,sparyed the conatats w/ cleanre and wraped/taped and sealed.
took pics b-4 disconnect ( altought it was pretty straight )forawrd,
and the rest is the frame, parts etc.
** i do have a question , ?? what is the size of the rat fuel tank ?
,, i noticed the oil resuvior is like 1 qt?
*** you are right plastic sweats = moisture

Ray Knobs · Post by **Ray Knobs** » Mon Nov 23, 2009 1:09 pm

The tank is right around a gallon.

B02S4 · Post by **B02S4** » Mon Nov 23, 2009 11:26 pm

The fuel tank is in the 1.1 - 1.2 gallon range.

Ray, that's what I thought you meant; hand-advance the lever. There really are no "adjustments" per se.

scootertuner1000 · Post by **scootertuner1000** » Wed Dec 30, 2009 4:32 pm

mojobuddy70cc wrote:,, you are right it would damage the engine eventually, but you can drill out the restrictor plate, i have a bud in my scooter club w/a Lammy (88cc kit) uses the same pipe wif a drilled plate, not nearly as loud, you can`t stand that prima noise, and there are noise ordances since i ride in the city, if it does`nt work out i will just have to buy stock or keep pay $60 to replace the silencer.

No dude he won't damage his engine. The most that will happen is he won't have optimum performance, when compared to a good expansion chamber.
2 stroke engines have bene around for around 100 years. Most of the that time they did not have expansion chambers. Expansion chambers were not invented until the 1960ies (in East Germany) before that the length of the pipe is what controlled the power deveopment of the engine.
The pipes were straight. If you look at the standard exhaust of almost all 2 stroke bikes, they are not expansion chambers. Expansion chambers are used to increase the performance potential of a 2 stroke engine by using a resonance pulse reflected off of the revearse cone on the inside of the exhaust to push unburnt charge back into the cylinder. This is not achieved by so much by back pressure, but by the shape of the exhaust.
Your standard Rat exhaust is a pipe with a muffler, no expansion chamber. It is very restrictive due the requirements of passing EPA pollution standards.
Most 2 stroke scooter exhausts differ from the 4 stroke exhausts in that they often include a catalytic converter to make the 2 stroke cleam enough for EPA requirements. Yes a good expansion chamber will increase your performance, but only a good one, most aren't well enough designed to make much of a difference at all. A 4 stroke exhaust will not harm the engine at all, and will give a slight increase in power over the standard highly restrictive 2 stroke exhaust, as it is far less restrictive.
Of course it wouldn't be as good as a GOOD expansion chamber, but it certainly will not harm his engine. Learn your stuff before you speak.

bigbropgo · Post by **bigbropgo** » Thu Dec 31, 2009 2:50 am

mojobuddy70cc has been banned and doesn't post here anymore.

scootertuner1000 · Post by **scootertuner1000** » Thu Dec 31, 2009 2:11 pm

bigbropgo wrote:mojobuddy70cc has been banned and doesn't post here anymore.

Really what was he banned for?

Wheelz · Post by **Wheelz** » Fri Jan 01, 2010 4:23 pm

not sure really but I'd venture a guess to say he, was a bit combative with the people trying to help him, and then accussed every body on the forum of being above 50cc helpful only. I tried to reason with him and tell him to calm down and be respectful, but that didn't work, so I guess that might be it. I didn't realize he was banned though, too bad.