Mine doesn't have a clutch. To start it I just kick the pedals backwards and it'll start the motor, then I can go back to forward pedaling.

Yama, keep in mind that when you say yours goes faster than 25mph, your bicycle with a motor weighs 100lbs less than a normal scooter or moped, so it'll want to move a little faster.

No clutch here either, when you kick it off (still working on fixing electric start) it starts spinning a little bit, but when you hit the ground (pop off the center stand) it stops, too much resistance for it to continue. You pretty much have to floor it to get it to move.

It's definitely different from the R, but it's fun in its own way.

Quote from: redhenracing2 on February 09, 2011, 08:53:53 AM
it starts spinning a little bit, but when you hit the ground (pop off the center stand) it stops, too much resistance for it to continue. You pretty much have to floor it to get it to move.

try turning the idle up a little bit. Once you get it running a little stronger that shouldn't be an issue. The automatic motors have a centrifugal clutch that will catch enough for the wheel to spin when it's on the center stand, but you should be able to drop it down onto the ground and have the motor still spinning. That doesn't have anything to do with the electric start not working. If it stops when you take it off the stand now, it'll do the same thing when you try to start it with both wheels on the ground. Maybe if you give it a little gas as you push it off the stand it'll keep running. Those kinds of things really make you appreciate a newer bike that just runs all the time like it's supposed to haha

No no, I made a misunderstanding. The engine stays running, the wheel just stops spinning when it catches the ground. That's what I meant.

Ooh, good stuff, sounds like it's doing what it's supposed to then.

Today it died.

I went for a ride a little longer than my 1 mile jaunt to work, and about 3 miles out I came across a section that is about 1/2 mile of steady uphill, not extreme but enough to strain it. I had to go WOT to continue up the hill, and based on my research these engines in particular don't like WOT past 15 mph, it just bogs and sputters. So after about 30 seconds of climbing uphill wide open, it just cuts off, and upon inspection smelled heavily of gas. Called a ride, brought it home, and got it in the garage. It has a very good, strong spark. The compression is good, as it is still has a firm kick when trying to start it. However, fuel is an issue. After taking out the plug and burning out all the floodedness with a lighter, it almost starts but then as soon as the throttle is hit to try and bring it to life, it goes right away. What would cause the carb to be dumping an insane amount of fuel into the engine? It's a small single cylinder, can't take much to flood it.

Does it have mixture screws?  If so, you might play with them.  You said in the other thread that it smokes a lot at idle, when it idles.  Does is smoke a lot when you're driving?

Since you've determined that too much fuel is killing it, I would try leaning it out and see if that improves it. 

How's the air filter?  Exhaust clogged?  Air leaks between the head and carb (although, that would cause it to lean out)? 

float height? Not sure, I never got mine running perfect in that aspect. did you pull out the spark plug to see what it looked like? Well obviously it would've looked rich, haha, but on a normal basis I'd check the plug to see if you're running lean or rich.

As far as the throttle being wide open, that's pretty much how people ride those things. They're not like sportbike where you need to modulate the throttle, I feel like people on scooters and mopeds are usually either just full on the gas, or off of it. you just need to get the carb set right. I love doing mechanical work, but when I started on that moped I found out that I really don't care for troubleshooting actual engine work. All of that same stuff you're going through now I had to do, and I didn't care for it one bit. some people really like it though.

Quote from: paulc86 on February 10, 2011, 08:37:34 PM
Does it have mixture screws?   Does is smoke a lot when you're driving?

How's the air filter?  Exhaust clogged? 

Unsure about a mixture screw, I'll have a look at the service manual. Insane smoking stopped after I hooked up the throttle cable to the oil pump. No air filter, some trash could have gotten in there which is why I want to clean it. Exhaust is definitely clear.

Quote from: tt_four on February 10, 2011, 08:57:38 PM
float height?  did you pull out the spark plug to see what it looked like?
As far as the throttle being wide open, that's pretty much how people ride those things. 

Float height is the first thing I'm gonna check when I get it apart. The spark plug looks fouled, I'm gonna put a new one in it in the morning. But it still is producing a healthy spark. And these engines in particular are very picky with throttle control, apparently it's a common issue with these. Once they get going, they don't want to be wide open. It seems that going up from an 88 to a 90 main jet fixes this issue.

Quote from: tt_four on February 09, 2011, 05:53:45 AM
Mine doesn't have a clutch. To start it I just kick the pedals backwards and it'll start the motor, then I can go back to forward pedaling.

Yama, keep in mind that when you say yours goes faster than 25mph, your bicycle with a motor weighs 100lbs less than a normal scooter or moped, so it'll want to move a little faster.

that is true TT, very true. weight plays ALOT into this

Quote from: redhenracing2 on February 10, 2011, 08:16:03 PM
Today it died.

I went for a ride a little longer than my 1 mile jaunt to work, and about 3 miles out I came across a section that is about 1/2 mile of steady uphill, not extreme but enough to strain it. I had to go WOT to continue up the hill, and based on my research these engines in particular don't like WOT past 15 mph, it just bogs and sputters. So after about 30 seconds of climbing uphill wide open, it just cuts off, and upon inspection smelled heavily of gas. Called a ride, brought it home, and got it in the garage. It has a very good, strong spark. The compression is good, as it is still has a firm kick when trying to start it. However, fuel is an issue. After taking out the plug and burning out all the floodedness with a lighter, it almost starts but then as soon as the throttle is hit to try and bring it to life, it goes right away. What would cause the carb to be dumping an insane amount of fuel into the engine? It's a small single cylinder, can't take much to flood it.

check the reeds in it. ( its a 2smoker right?)

That thing is not a Honda, the speedo is a fake. Its a BMW, you can tell by the badge on the front. 

Quote from: yamahonkawazuki on February 11, 2011, 12:52:56 AM
check the reeds in it. ( its a 2smoker right?)

It is, but I know almost nothing about the difference between this engine and a normal moto engine. I have heard mention of reeds a few times, wtf is a reed?

After a trip to howstuffworks, I have gained some much needed knowledge on how two-strokes work. I see that the reed allows mixture in when a vacuum is created during the compression stroke, essentially working as a one-way valve. So what could have gone wrong, is it possible this is stuck open?

It's possible it doesn't even have a reed valve, you'd have to see if there's a little box for one between the carb and the cylinder. You're right though, it basically takes the place of the valve so nothing comes back through the intake. Pull it apart and take a look, the reeds are pretty simple so if there's anything wrong with it you should be able to tell just be looking at it.

Pay close attention to the definitions in your particular state.  What is ACTUALLY a moped and what is LEGALLY a moped may be two different things.  As I recall, and I may be wrong, in Virginia a moped (legally) was under 50cc, under 3 hp, and certified max speed pf 30 mph or less.  Pedals were irrelevant.  I don't know about Texas, where aI am now.

Looks like a fun challenge to put it back together.  Have fun.

Chuck

Quote from: Chuck500 on February 11, 2011, 09:08:04 PM
in Virginia a moped (legally) was under 50cc, under 3 hp, and certified max speed pf 30 mph or less.  Pedals were irrelevant

It is the same in GA. I have checked and confirmed with multiple authorities, and should be perfectly legal as long as nobody pays too close attention to the '79cc' stamp on the engine.

Anywho, I got it running.

Here is the carb, over the notorious spill on the workbench from when I painted my gs. Got it all apart, and let it soak in some sea foam.



While the carb was soaking, my curiosity struck up and I jus had to see this 'reed valve' in person.





Once put together, (with a fesh spark plug, the old one was nowhere near the correct length) it took about 5 kicks for it to start up. Once it did, it purred like never before, and sounds much healthier, even better than the weed eater at the shop 

Quote from: the mole on February 11, 2011, 03:44:22 AM
That thing is not a Honda, the speedo is a fake. Its a BMW, you can tell by the badge on the front. 

BMW made scooters? Is it an actual "badge" or just a sticker?

I did find something when I goggled bmw scooters.  
http://www.bimmerfest.com/forums/showthread.php?t=495883
If you scroll down you'll see some pics. 

tis why i like my moto bike. i can get anywhere i want to go @ 35+ mph, sans license insurance or anythign whatsoever.  different locations have different rules tho.. contemplating building a moto tandem bike.

Hey you can go to these guys and stretch it out
http://orlando.craigslist.org/mcy/2238637924.html

Mary