MOPED ARMY

I've replace the fuel but a follow up question would be: Would a bad mixture cause a lot of smoke? Like burning oil? I might have messed up the mixture. Are my pistons shot? I replaced the main jet so that should be okay. I will check the exhaust. I've seen the article. It's really helpful.

Thanks for your help.

Thanks for the post. You're right. The newer Tomos' had oil injection. My 88 Tomos is a regular ole Bullet. That year the oil injection was standard only in the upper end models. You put my mind at ease a little about the rings. I was talking about the gas/oil mixture (premix) in the tank. I don't know where (if any) an adjustment is on the fuel/air mixture. If you know that might help me. Thanks for the help and I'll check the plug.

I've heard that tomos exhausts are absolutely NOTORIOUS for plugging up. take it apart and clean it inside. also, one of the bolts in the back of the baffle just acts as a plug (i think it's the lower one). You can pull that out to get a little more exhaust flow. It'll make the exhaust a little louder, but no worse than any motorcycle.

On the very end of the exhaust pipe is a cap with a little screw in the side.

Unscrew it, and take a pipe wrench or large visegrips and get a good grip on it - then pull straight out while working back and forth.

If the cap comes off without the baffle, just put the grips on the little tube that was connected to the cap, and repeat above.

Once you get a look at that gunked-up carbon-catcher, you will definately get the point of removing it...also, you will have a slightly more "agressive" exhaust note, which sounds pretty cool.

I wouldn't worry too much right off about gunk and smoke right after a rebuild or repair, cause that happens, but if it continues to happen past about 50 miles, then worry.

When you make repairs, it takes a while for crud, leakage, etc, to burn off, so be aware of that...it's not gonna run flawless immediately even if you disassemble and clean the whole damn works, especially if it's a tomos.

-R

Thanks a lot. I'll try that.

I checked the plug last night it seemed to be okay but a little damp. But the big thing I noticed was that I heard air from the cylinder head. Now, I don't ever remember having a head gasket for the TOMOS. So the question is, is there a head gasket I can buy, or have I put the cylinder head on the wrong direction? I was once told by a technician that there is only one way to put it on. Maybe I put it on wrong but I saw bubbles and it was wet at the seal area. I'm afraid of tightening too much on it because it might strip. Can anyone answer my question?

How `bout some loctite on that Ree?I'm getting ready to install a 60cc kit and I was gonna use some good loctite.Also,do you retighten when you have to use a composite gasket with metal sealing ring?Open to suggestions `cause I have always re-tightened head gaskets as a general practice.

Mark,

Use a sheet of fine wet or dry paper on a sheet of flat glass. Wet it, and rub the head in a circular motion on the wet or dry. If the head is flat, you will get an even flat finish on the head. Make sure you wash it well after ginding. Loctite makes a flexible, high temp joint material that I have used for heads and seems to work well. Unfortunately, I cant find the tube but most auto parts carry it. If it helps, the torque for Motobecabe head bolts is 9 ft/lbs.

Ron

Thanks for the post. I'm going for the record responses here....:)

I'll try and take the carb apart again. It won't ever get to full throttle/power. Even when I have it full throttle it dies. It sounds like it is starving but I'm not sure for what. Air filter is new. It doesn't seem to be smoking quite as much so I think that that stuff is burning off. Do you think it could be other stuff like timing? I haven't messed with that yet but it was okay when I stopped riding it. Plug gap is good. I guess I'll be back with an update tomorrow. I'm dying to get this going.

Mark

Mark,I checked back thru your posts and I don't see where you REPLACED the spark plug.Ron and I went thru something like this before because the guy always assumed the spark plug was o.k..BOY!Did Ron go thru it!Must've been 40 posts tryin' to help that guy!SO REPLACE THE SPARK PLUG WITH THE PROPER # BOSCH SUPER OR PLATINUM,o.k.?

BTW To answer your last question, it always sounds like it is dying. It doesn't ever smooth out.

Ignorance is coming out again but what is the jug? Are you talking about the inlet pipe that the carb fits into/over?

It's slang for the cylinder, Mark.

Okay, Well, I took off the air filter completely, cleaned and reexamined the carb and it still did the same thing. So I'm guessing it isn't an air/fuel mix problem. Still sounds starved and runs rough. I'm next going to try and find a Bosch replacement plug and pull out the exhaust. (BTW when I take the nuts off under the cylinder block for the exhaust, will I be loosing up something inside the block or are those bolts there to stay like the cylinder head bolts?) Then I'll try don-ohio's suggestion and spray some carb cleaner around the joints. If I still don't notice any improvement then I give up. I really want to avoid taking the WHOLE engine apart. I guess I'll take it to a shop and pay $200 to get a $50 moped working. - something I was hoping to avoid....oh well.

Just to clarify. You want me to spray the cleaner around the seals where the cylinder block meets the transmission case?