Junior
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JCL MP-250A
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Post by Ernie on Sept 24, 2011 8:50:09 GMT -6
I wrapped the little rubber bumper wheel with several layers of duct tape. Maybe this will make a difference.
God forbid, maybe I do have a rod knocking???
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Junior
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JCL MP-250A
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Post by Ernie on Sept 24, 2011 7:13:46 GMT -6
My little black rubber bumper wheel looks like new. I wonder if I wedged a thick towel between the rubber bumper and the motor I would be able to hear a difference. My luck it would get caught up in the machinery and cause a worse problem.
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Junior
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JCL MP-250A
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Post by Ernie on Sept 23, 2011 20:27:49 GMT -6
Here is it one day later after changing the carb and something troubled me about the throttle cable where it attaches to the carb bracket. When I got home today, I took it off and spread loctite on the threads and retightened it. If that would have let loose due to vibration with my precious arse aboard, I might end up with road rash or worse.
Anyway, that being done, I turned the key and hit the starter and it started on half a flip and went right up to high idle at 2,000rpm. Not bad for sitting 24 hours!
Life is good. ;D
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Junior
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JCL MP-250A
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Post by Ernie on Sept 22, 2011 18:57:12 GMT -6
I installed a new P30L carb on my JCL MP250A and it wasn't that bad except that the idle screw is horizontal facing the rear of the carb instead of vertical like the old one. It's always something...
After cranking it for quite a long time, it finally started. Mix set at 2.75 turns out. It idled right up to normal and when the enricher kicked off, you couldn't tell the slightest stumble.
When I cracked the throttle open, there was a slight hesitation and it revved up like no ones business.
I let it idle for about 15 minutes and it sounded nice and steady. First nice day and I will take it out on the road.
Ernie
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Junior
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JCL MP-250A
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Post by Ernie on Sept 21, 2011 17:06:12 GMT -6
Thanks! Do you mean the little black rubber bumber that keeps the center stand from hitting metal on metal when it's up?
Ernie
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Junior
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JCL MP-250A
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Post by Ernie on Sept 21, 2011 13:26:10 GMT -6
Wouldn't anyone care to hazard a guess on my strange hard throttle racket?
Ernie
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Junior
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JCL MP-250A
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Post by Ernie on Sept 20, 2011 19:44:25 GMT -6
Now that's pretty neat! ;D
Ernie
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Junior
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JCL MP-250A
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Post by Ernie on Sept 19, 2011 6:00:54 GMT -6
This is a new one!
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Junior
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JCL MP-250A
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Post by Ernie on Sept 18, 2011 21:39:12 GMT -6
I checked every bolt on the exhaust system and all were tight right up to the head/manifold bolts.
Any other ideas?
Ernie
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Junior
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JCL MP-250A
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Post by Ernie on Sept 18, 2011 10:24:38 GMT -6
I have been having a small problem with stalling when the electric enricher kicks out before the motor is sufficiently warmed up.
While taking my morning constitutional, I had a thought. It is my understanding that the electric enricher heats up a waxy gel of some sort using 12V and the needle is allowed to fall back into the off position.
If this occurs too soon, why couldn't I install a potentiometer or a resistor on the 12V line to reduce the voltage and slow down the enricher from turning off until the bike is warmed up?
Comments?
Ernie
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Junior
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JCL MP-250A
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Post by Ernie on Sept 18, 2011 9:01:52 GMT -6
After watching some of the videos of scooter rides on here, I am wondering if I have a problem. All of the ones I heard had nice throaty sounding mufflers. When I lay on the throttle, my MP250A sounds like someone beating back and forth inside a coffee can with a wooden spoon. When I am not accelerating, its nice and quiet. As soon as I open the throttle, it gets that sick banging sound. Stock muffler. 280 miles Any thoughts?  Ernie |
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Junior
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JCL MP-250A
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Post by Ernie on Sept 17, 2011 14:34:16 GMT -6
After much adue and frustration, I have this MP250A to where it starts easy, idles up nice with the enricher but when the enricher goes off, the motor isn't quite warm enough to sustain stable operation and it gradually slows rpm and stalls. Once it's warmed up, it runs good. This has really got my shorts in knots! I have a new carburetor on the way. How's that for desperation?  Ernie |
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Junior
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JCL MP-250A
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Post by Ernie on Sept 17, 2011 14:27:41 GMT -6
The easiest thing to do is pop the cap off of the low speed idle mixture screw which is directly underneath the side of the carb that connects to the motor. Crank it all the way in(clockwise) then set to 2.5 turns out. This is where JR says the starting point is. You need to tip the carb with the bottom 90 degrees toward you to get at the screw by loosening the collars on either side.
Ernie
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Junior
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JCL MP-250A
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Post by Ernie on Sept 9, 2011 5:59:00 GMT -6
I reversed both vacuum lines and it ran worse. I am trying to get the proper canister from JCLUSA Inc.
I have been waiting 2 weeks for a reflector so I may or may not ever see the canister.
Can't find an exact match on line.
Ernie
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Junior
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JCL MP-250A
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Post by Ernie on Sept 7, 2011 21:21:27 GMT -6
Since I got this scooter, it has had a strong gasoline smell after a ride. Today, I changed the charcoal vapor recovery canister. The gas smell is gone but the scooter doesn't seem to rev as quickly as before.
The canister is not an exact replacement but it is slightly larger yet has the same three hose connections as the OEM.
Could changing this goody have effected the performance of the motor?
Ernie
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