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Post by jjoshua20213 on Apr 5, 2014 21:21:28 GMT -5
Well I took my 20mm Carb to work today and cleaned it throughout with an airgun. I put a stock pilot jet in it and a  main in. Its like a new beast. I think its time for a gear swoop now. This what's in it now: 52mm bbk 50mm hoca head ncy 80cc can 20mm Carb w/free flow airfilter Ncy stainless steel exhaust Koso variator w/6.5g sliders Gates power belt ncy clutch sheave and clutch bell HP coil and cdi Iridium plug Performance shock I think a striker crank and hoca gear set will be on order soon. I would highly recomend an "A9" Camshaft. That's what really unlocked the power in all my builds |
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52mm build
by: jjoshua20213 - Apr 4, 2014 11:53:52 GMT -5
Post by jjoshua20213 on Apr 4, 2014 11:53:52 GMT -5
1 gasket and the piston hits the head. Millsc told me to use two and like magic no hitting.
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Post by jjoshua20213 on Mar 31, 2014 22:50:15 GMT -5
At first you say you swapped out the coil/wire, so you've ruled that out, then in your next post you say you suspect it's the coil. Don't try to overthink it, swap the coil/wire from the bad scooter onto the good one, if that's fine it's most likely either the stator or the R/R. You can swap everything but the stator to the good scooter easily to test them. Sorry, ment to say pick up coil |
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Post by jjoshua20213 on Mar 31, 2014 16:47:01 GMT -5
The rain and snow probably got into the stator and shorted it out is my thinking. Alleyoop Me too. The pick-up coil looks bad also. It was light rain out when all this happened and I was riding for less than 10 mins. The day prior I was on it all day no problems Its to my understanding that the engine fires in this order : : Pick-up > CDI > ignition coil > high tension lead > boot > plug... Right? The engine sounded like improper timing followed reduced spark so i'm leaning toward the pick-up coil. My question is if ive ridden in severe snow and rain and had no issues then then why would light rain kill it in 10 mins? If it was in the process of shorting out, would the abnormal voltage cause the cdi to get confused when to fire thus the backfiring/misfiring followed by no spark? If I replace either one i'm going to do both, I just like knowing what went wrong for quicker diagnosis in the future. |
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Post by jjoshua20213 on Mar 31, 2014 16:03:44 GMT -5
So yesterday morning, I made a food run in the rain. ( have been doing a lot of snow riding too) And in less than 3 miles the bike starts misfiring and backfiring horribly and loosing power. That lasted for about 20 secs. Even after I notice a slight power loss. A half mile later it starts back again and this time I could tell it lost all spark. (Like hitting the kill switch) No amount of throttle or anything would make it fire again. Ever since then the bike has no spark. I've torn down the top end out of suspicion of a warped valve and because i'm replacing the piston and no signs of problems, compression sounds good. I know its getting gas because starter fluid made no difference. Just random and sudden no spark.
So far i've ruled out the CDI, and the coil/wire by spare parts. All lead point at the stator or pick up coil. The bike did act like the timing was off right before it died (Extraneous popping/ back firing, misfiring) so the pickup-coil is under suspicion. My battery was fine.
What caused this SUDDEN problem?
Can the pick-up coil die out that fast?
I have a running parts bike I could get a spare engine from but an engine swap by myself seems doable but difficult and is my last resort.
I could also get just the stator off of it but if that does not fix the problem I just did work to create more for myself.
Also while removing the flywheel I managed to crack the case around where the stator sits. Its not bad just cracked. The whole area is weak and can be easily broken with medium to low force.. Don't remember it being like that before...
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Post by jjoshua20213 on Mar 30, 2014 15:10:36 GMT -5
So I was riding this morning for less than 3 miles and it started popping from the exhaust and and loosing power and than ran normal again for about 1/4 of a mile and started back popping again and quickly lost power and then cut out as if I hit the kill switch. Then engine was still spinning but it was like it just stopped sparking. I thought I somehow got water in the gas so I drained the carb and tank and out new gas in. Same result. I took the spark plug out with it still in the cap and tried to start it and look for spark by touching the electrode to the engine case. Nothing. Not even the slightest spark. So far ive changed the cdi and the ignition coil and tried to start it with the kill switch wire unplugged. It was running fine yesterday and this morning it took a little throttle to get it started and ran good the first mile, then it quickly died Last Thursday the exhaust broke off the scooter for the third time in a month leaving just the pipe. I got tired for finding replacements so I just left it there. I up-jetted to compensate so I didn't burn a valve. Ive been riding like this successfully. Still lean on the pilet jet but where I live requires wot  % of the time. 2days ago my scooter was making a similar popping sound and surging so I suspected a problem with the timing advancing cdi I had. Long story short I put stock back on and the problem was instantly solved. |
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Post by jjoshua20213 on Mar 27, 2014 16:58:53 GMT -5
I'de use it. If it runs funny drain it, but I doubt it will
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Post by jjoshua20213 on Mar 26, 2014 3:38:08 GMT -5
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Post by jjoshua20213 on Mar 25, 2014 19:58:54 GMT -5
Short term fix: wire in a diode.Or if your scooter already has one, its probably bad.
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Post by jjoshua20213 on Mar 24, 2014 23:30:57 GMT -5
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Post by jjoshua20213 on Mar 24, 2014 19:26:00 GMT -5
Had problems with the exhaust pipe breaking and needing replacement. I had the screws in super tight not expecting for it to break, long story short when I put the new pipe on the screw holes were stripped and un-usable. How would I go about solving this? Slightly larger screws? I think they were m-10's. They require an Allen wrench.
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Post by jjoshua20213 on Mar 24, 2014 14:21:56 GMT -5
Wrong wiring?
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Post by jjoshua20213 on Mar 22, 2014 21:58:08 GMT -5
Post pics, of it, its is usable good, if not sorry.... Life happens. scrappy's not going to take back a user error. Just being honest.
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Post by jjoshua20213 on Mar 22, 2014 9:34:30 GMT -5
China scoots are for folks that are not afraid of a wrench, even in China. Watch serpentZA on youtube for how the Chinese handle China scoots. Constant maintenance is the key. It is often daily maintenance. They run, but only for the folks that can keep them running. For a non-mechanical person, a China scoot may be a bad choice. Go Japanese if you want dependability and quality. Go China scoot if you like tinkering. 'nuf said Pretty much |
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Post by jjoshua20213 on Mar 20, 2014 9:10:34 GMT -5
Yea, but it will NEGATIVELY effect performance. With out more air to push out your just lowering back pressure and making it louder. Might look cool though
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main in. Its like a new beast. I think its time for a gear swoop now. This what's in it now:
% of the time.