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12-15-2018, 08:18 PM
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#1 |
 Join Date: Dec 2018
Location: Cape Town, South Africa
Posts: 5
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2 Part Question!
Hi Everybody
I please need some advice: 1. I bought a Jonway 250cc 2011. Very low milage. I went over the whole bike, changed fluids, cleaned and replaced filters, and most tubing ect ect.. I also serviced the Carb, and I followed the instructions from this forum when I set the idle Air/fuel mixture. However I am having trouble, the idling is very inconsistent cold or hot. When I start the bike in the mornings it takes first time. The RPMs go up, as I would expect from the auto choke, but it doesn't stay on for very long, and I am having to throttle the bike to keep it going. Then as it warms up the RPM goes up almost over 2000 and I'm having to hold the brakes while I am stationary. I have now for the last 2 days also seen the RPM while stationary and idling going up and down by itself (Hunting I think its called). Has anybody had a similar problem. P.S The only thing I haven't done yet is adjust the valve spacings. 2. Second question: Can anybody please tell me where I can purchase new or good condition used body panels and fairings for a yy250t-2. I have searched the web, and no success. |
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12-15-2018, 08:35 PM
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#2 | |
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Join Date: Nov 2018
Posts: 12
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Quote:
Sent from my LGL158VL using Tapatalk |
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12-17-2018, 02:41 AM
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#3 |
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Join Date: Dec 2018
Location: Cape Town, South Africa
Posts: 5
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[QUOTE=casey360360;537318]Who manufacures the engine? From what I can find those came with either the Linhai VOG250 or the Honda Helix 244 clone, I can't find much on them that being said.
Hi casey360360, As I understand it's the Honda Helix 244 Clone. Regards Ctscoot |
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12-17-2018, 10:54 AM
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#4 | |
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Join Date: Nov 2018
Posts: 12
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[QUOTE=CTscoot;537323]
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With what you're describing I would start by inspecting the CDI module, it should be the 2 plug I think 8 pin style. Honestly, you can get a performance replacement coil, CDI and plug for $15 on Amazon, just search Honda CN250 performance CDI, it may be worth it to just replace them and see if that fixes the problem. Worst case is you have spares now. I suggest this because (in my experience with other scooters) the CDI controls the auto choke, when the CDI starts failing you'll experience issues with the auto choke and/or spark advanced. I have a very similar issue with my Linhai, the CDI failed and I replaced it with the wrong one, the spark advanced causes late and pre detonation as well as it doesn't actuate the choke. Sent from my LGL158VL using Tapatalk |
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12-18-2018, 03:44 AM
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#5 | |
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Join Date: Dec 2018
Location: Cape Town, South Africa
Posts: 5
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[QUOTE=casey360360;537325]
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I will definitely check the CDI. I can source one locally. Will post once I have replaced the CDI. |
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12-24-2018, 03:03 AM
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#6 |
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Join Date: Dec 2018
Location: Cape Town, South Africa
Posts: 5
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SOoooo, I had some time yesterday to try and trouble shoot the inconsistent idling.
This is what I found... The bike has a very rough/harsh pull away and the whole bike shakes and rattles, but only for a very short distance, and hardly anything if I accelerate hard. I know this is my clutch, I am waiting on a replacement. But... because of this, the throttle cable came loose at the fix point on the carburetor and the air intake was half off the carburetor as well. I went a head and and re-attached the throttle cable (going to order a new today) and re-secured the air intake with a better hose clamp. This has fixed the idling  I also discovered that the radiator fan fuse slot was empty, inserted a 10amp fuse. The fan is now working I will be going over the bike from front to back with a magnifying glass this week, and hopefully I can detect and fix anything that comes up. Thank you, casey for your help and input. Much appreciated!! I think I will start a new thread, as I am still trying to find fairings and body panels for my scoot, would love to have her looking her best. Thanks Clinton |
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