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Post by scjbob on Oct 24, 2013 21:37:12 GMT -6
This time I didn't take the float off when I cleaned it. But The mouse issue may be something I need to check out. When I pulled the scooter out of the barn I found a mouse nest under the seat. I'll have to check all the wiring...didn't think of that.
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Post by scjbob on Oct 23, 2013 11:20:34 GMT -6
JR, I checked around the center stand and found nothing there. As for the upper shock area I'll have to look that over the next time I step into my barn storage area. I will say that I am completely frustrated over this Chinese scooter. I've had it for 3+ years and have only been able to put 400 miles on it. I replaced all the vacuum and fuel lines, adjusted the valves air-fuel ratio and idle, installed a new CDI and coil, new spark plug, cleaned the carb multiple times, etc. And I still can't depend on it to start and/or run consistently. I realize that these cheap scooters need constant attention but this seems excessive to me.
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Post by scjbob on Oct 19, 2013 15:19:33 GMT -6
That's what I thought as well. When I looked over it this morning I thought perhaps the plug wire was getting pulled by the air intake tube. But I need to do a more thorough search to see if something else is getting pinched off. I'll check again tomorrow and let you know if I find anything.
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Post by scjbob on Oct 19, 2013 15:16:54 GMT -6
JR, this may sound funny but I am not sure. How do you tell the difference? When I bought mine in 09 it was advertised as a Viper 260.  |
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Post by scjbob on Oct 18, 2013 15:29:43 GMT -6
Today I installed a new fuel pump and fuel lines on my Linhai 257 Touring Scoot. I also cleaned the carb because of problems caused by old fuel. I gave it some new fuel and it started up just fine. Throttle response was also good but it took a little bit of adjustment to get the idle to calm down. Once I solved the idle problem I shut it down and brought it down off the center stand. I tried to start it up but no go. I put it back up on the center stand and it started up and ran just fine. I have the idle set so that the rear wheel stops running (approx. 1800 rpm). So I brought it down off the center stand once more while it was idling and it died again. And, of course, it wouldn't start while the rear wheel was on the ground. Has anyone seen this problem before?
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Blown fuse
by: scjbob - Jul 2, 2012 17:41:23 GMT -6
Post by scjbob on Jul 2, 2012 17:41:23 GMT -6
I started up the Linhai 260, hit the gas and it immediately died. I found that the fuse at the battery had blown. Since this is the first time this has happened, with only 400 miles on the engine, I was curious about the cause. Perhaps it's no big deal, otherwise it wouldn't have come with a spare. Any thoughts?
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Post by scjbob on May 1, 2012 19:51:20 GMT -6
No matter the level of frustration that these Chinese contraptions bring you there are some pretty bright people here. I'm sure you'll figure it out with their help. I posted my series of "fixes" so that perhaps others who have similar problems can learn from mine.
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Post by scjbob on Apr 28, 2012 7:51:31 GMT -6
Travails are finally over. I took it for a test ride and it reacts appropriately to the throtle now in all conditions...no more bogging, idles and starts nicely, cruises evenly at all speeds etc. I was ready to toss it off a cliff last fall but I suppose I'll keep it now. It's two years old with only 350 miles on it because of the length of time it took me to figure everything out. Thanks to the Professor and others on this site!!!
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Post by scjbob on Apr 21, 2012 10:05:40 GMT -6
Well after a very busy winter, between work travel and moving into a new place, I am finally getting back to fixing this problem. I pulled the diaphragm needle assembly and there is no clip on the needle. The needle also has no notches in it. Either I lost the clip or there never was one on this needle.
Should I use a small washer to lift it slightly? If so how thick should the washer(s) be to simulate a one-notch adjustment? By the way there is no intake or carb leak that I can find. I sprayed WD40 liberally around the intake manifold and the carb-intake connection with no change to idle.
Since posting this comment earlier today I have discovered what I believe to be the problem. And it's embarrasing to say what it was. When I cleaned the carb I installed the needle holder into the diaphragm before he needle. This caused the needle to be held almost 20mm higher than it should have been. I haven't test driven it yet but the bog is now gone at 1/4 throttle. It also idles nicely and accelerates smoothly while on the stand. I'll posst my test drive results later.
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Post by scjbob on Oct 7, 2011 13:24:50 GMT -6
OK. My patience has run out. I've done everything short of rebuilding the engine and still cannot get a decent throttle response. Idle set at 2000. Starts right up...no problem. WOT...no problem. Initial throttle at 1/4 turn and it bogs. I have adjusted the air/fuel screw multiple times...always starting out at 2 1/2 turns and cannot find a smooth 1/4 throttle. Anyone want to buy a 260 Linhai with only 350 miles on it cheap?
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Post by scjbob on Oct 7, 2011 9:29:59 GMT -6
OK. So I'll set it a little higher and see if that does the trick.
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Post by scjbob on Oct 4, 2011 20:26:15 GMT -6
OK. I think I am finally near the end of this long endeavor. I set the idle at 1700-1800 and it starts right up with no problem. It also takes off like a scalded dog with strong acceleration at WOT. However when I let off the throttle to slow down to a stop it dies. It won't let me cruise at a slow speed (10-25mph) smoothly either. The stalling happens consistently with each braking to a stop. Is it my air/fuel ratio? What do you suggest?
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Post by scjbob on Sept 20, 2011 19:18:32 GMT -6
Thanks JR. I'll set the idle a little higher to see if that does the trick.
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Post by scjbob on Sept 18, 2011 17:51:59 GMT -6
OK. Took it out for a low speed test ride. It seems to want to bog down a little when cruising at low speeds (10-15mph) I only took it up to about 40 so I haven't tested WOT yet. Won't be able to for another 2 weeks though due to travel schedule. It idles pretty good at about 1500. But with the low speed bog issue I suspect I'll need to fool with the slow idle screw to get it just right?
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Post by scjbob on Sept 18, 2011 11:35:44 GMT -6
Ernie,
My Linhai carb has the low speed idle mixture screw located on the side surface of the carb so I did not need to remove the carb to get to it. I set the screw at 2 1/2 turns and viola! It not only started right up, it didn't bog as I hit the throttle and took it to about 4500rpm. Now I can install all the body panels and road test it for fine tuning. I'll give you a road test report when I'm done. Thanks to JR, you and the others for all the helpful hints. This is a great site. After this long series of diagnostic tests and adjustments I feel like I now have an undergraduate degree in Chinese Scooterology. I hope I won't need a graduate degree to solve any future problems. Cheers!
Bob
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