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Post by turtle8 on Jun 23, 2011 16:54:37 GMT -6
I need to amend my original observation notes. I've fiddled with the mixture with no significant changes in engine operation. I could not detect any air leaks. The sound I am getting while on the center stand, and revved to 2,000 rpm is a slight dieseling sound. Low speed acceleration is still poor; I'd called it bogged down.
As I stated in another thread of mine, the rear wheel still spins at a good clip while idling on the center stand. My new clutch from ScrappyDog didn't fix that problem.
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Post by turtle8 on Jun 23, 2011 15:46:04 GMT -6
Idle mixture screw is the small brass screw on the bottom of the carb, right?
Also, I have what sounds like a loose brick inside my muffler.
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Post by turtle8 on Jun 23, 2011 15:20:03 GMT -6
I finally took some test rides today and the acceleration is very slow below 3,000rpm. It didn't look like the variator was operating properly, so I took if off for inspection. All of my slider were out of position and pretty much toast. I installed the old rollers and there was no improvement in acceleration. What size belt should I be running? It doesn't seem to be going up and down the pulleys as far as it should.
Note: The engine idle has a pronounced lope to it and a minor pop sound from the exhaust at low rpm. I enriched the mixture some, but that didn't fix the popping sound. After the subsequent test ride, I could smell that the mix was rich.
Above 3,000rpm the acceleration is OK and there is a little bit of vibration that I am not too keen on.
What kind of insight do you ScooterDocs have for me this time?
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Post by turtle8 on Jun 23, 2011 7:32:30 GMT -6
Ahh, yellow which is the fastest of the colors. I took a closer look at the pictures. This looks like a large unit. A scooter in the middle with a chain drive to the rear wheel and an independent front suspension with two wheels. Seems to have a CfMoto style engine also. Here's the trike I would probably buy. It's a 150cc which retails for $1900 to $2000. I believe it comes in yellow too! Yup, I like that one too. It is a quasi-clone of the Piaggio MP3. Does it have the parallelogram front suspension that leans too? |
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Post by turtle8 on Jun 22, 2011 17:18:54 GMT -6
I hadn't had the joy of putting the scooter on the road yet. I have Kendas on my bicycle, so I figured they could be good scooter tires. I wanted something with either a groove running around the circumference or tightly spaced tread blocks. I old tires had wide grooves, almost as wide as a dual-purpose tire. Before I bought the scoot, the tread blocks on the old ones had feathered badly.
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Post by turtle8 on Jun 21, 2011 15:05:12 GMT -6
Whew! Installing a Kenda K413 130/60-13 tire is the hardest thing I have ever done! It took a large man standing on the tire, plus me working tire levers to get the last part of the sidewall over the rim.  |
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Post by turtle8 on Jun 21, 2011 9:21:33 GMT -6
Bummer... You might be able to 'feel' if it is a crank bearing. Sometime if you pull the plug and turn the engine by holding the fan you can get a slight vibration. When they go really bad there is play in the crankshaft. Do you think it could be the clutch slipping at high RPM...? Might also be a loose baffle in the muffler... I have spent days trying to find those suckers! The noise is definitely coming from the area of the engine. Otherwise it runs smooth; just when you hit about 45mph, it really makes a racket. This scooter doesn't have a tach. |
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Post by turtle8 on Jun 21, 2011 9:06:35 GMT -6
I sprayed off my clutch assembly with cleaner so I could get a closer look. I found two of the cast loops on clutch arms were broken which mean there was no place to hook the springs. The whole unit was unbalanced as it operated. I ordered a new assembly from scrappydog last night.
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Post by turtle8 on Jun 20, 2011 21:12:27 GMT -6
PM'd
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Post by turtle8 on Jun 20, 2011 20:49:57 GMT -6
I can see how incorrect variator assembly could effect the clutch, but in my situation my rear wheel as spun at idle since I brought this $300 scooter home.
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Post by turtle8 on Jun 20, 2011 18:14:17 GMT -6
nope, idle comes down, and it still turns.
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Post by turtle8 on Jun 20, 2011 18:07:15 GMT -6
DOH! I didn't do that test.
Tell me about the clutch arms. I pulled the clutch off and I am able to move one arm, but it is very stiff. The other two arms won't budge.
Another note: when I had everything put together, when I ran the engine with the scooter on the center stand, the rear wheel would bounce like a wheel on a car with a bad shock absorber.
About buying a clutch assembly, I can't seem to find one with the exact dimensions.
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Post by turtle8 on Jun 20, 2011 17:28:24 GMT -6
I pulled the variator again. Not sure if I placed the sliders correctly the first time. When I looked at them, some were nicked. I reinstalled them in the correct position and bolted on the variator. I then ran the engine again and immediately hear the rattle noise that has turned into a 'banging' noise. I put my ear near the clutch, I am pretty sure that is where it is coming from. That may explain why the rear wheel never coasts.
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Post by turtle8 on Jun 20, 2011 15:00:51 GMT -6
Hey Docs, my 250B's rear wheel won't stop spinning at idle. I set the idle speed, mixture, and also put in my Dr Pulley sliders. I am getting a rattle sound from the transmission area - variator and/or clutch. The belt doesn't seem to be going down far enough in either the variator or the clutch pulley.
What are ya'lls thoughts?
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Post by turtle8 on Jun 20, 2011 12:05:31 GMT -6
I am thinking crank bearings now. I haven't pulled the CVT cover off yet, but I'd imagine a loose screw sound to be less rhythmic. This sound reminds me of my Dodge Neon when I had bad rod bearings.
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