New Rider
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Posts: 28
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Joined: Oct 16, 2014 8:43:57 GMT -5
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Post by yellowjacket on Oct 23, 2014 7:46:52 GMT -5
Hi guys, A little background of my scooter adventures. Bought a 50cc tao, installed 83cc kit, varitor, cam, cdi, wiring, removed the epa garbage, exhaust, high flow filter. All went well but had backfires when letting off the gas. By the time I realized the gasket where the exhaust met the engine was missing, the backfires had blown the back of the new exhaust out. I put the stock exhaust with gasket and stock airbox back on. No matter how hard I tried, I could never get the exhaust gasket to completely work. I would always hear the engine start loud, as if there was no exhaust, then quiet down as presumably, the copper gasket expanded. Fast foward to buying new exhaust again, but this time, instead of the ring style gasket, I bought the nyc performance flat gasket. At the same time, I changed my bendi starter clutch and bought a new battery. It now has a hard time turning the engine over, although it still does. Pretty much, I have 2 quick shots, tops, for the engine to start. If not, the brand new battery won't have enough juice to kick it over. The kick start works, but unlike before, it doesn't just snap right back up. It kinda slowly rises back. It also has the rare tendency the bounce back halfway through a kick. Sooo my question, did having all gaskets tight now increase compression? Is my new battery bad? Did I screw something up installing the starter clutch? ? Thoughts?
Thank you!!
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Post by xyshannen on Oct 23, 2014 8:12:29 GMT -5
Don't know about the starter clutch, but presumably, if it turns over then it's on OK. Have you checked your voltage coming off the battery? Sometimes batteries sit long enough on the shelf to loose some of their charge. No your gasket has nothing to do with compression.
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Sophomore Rider
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Posts: 196
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Joined: Jun 29, 2013 18:49:49 GMT -5
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Post by newbscootdude on Oct 23, 2014 13:14:57 GMT -5
the only thing i can chime in on is the battery. check the label on youre old battery and see if it said something like 12v8ah or 12v4ah your basically looking for the number in front of the ah then compare that number with the number on your new batter if its lower than your original thats why you cant get very many cranks out of it (i would be assuming you got more from old battery) i made that mistake myself my scoot takes a 12v8ah battery and just bought one that said "fits most 50cc scooters" and when i got it its a 12v 3ah i wouldnt even crank my bike over once...
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Post by alleyoop on Oct 23, 2014 13:33:14 GMT -5
On a battery two things are important getting the right amount of AMPS and rated high CCA's(Cold Cranking Amps). You can get a 12v 8,9,+ Amp battery and it will crank your motor over only a couple of times IF the CCA's are lower than 100. You want to get a battery that is rated well over 100 CCA's closer to 200 would be great. But you will pay more for such a battery. The Cheap batteries the CCA's are well below 100 that is why they are so cheap, you get what you pay for it. Alleyoop
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Post by wilds on Oct 24, 2014 10:50:31 GMT -5
I had problems with starting the engine before I changed all my battery cables to better ones. The original battery cables are crap! The core of the cables are too small, it's only the red rubber around the cables which are a bit thicker. The area of core is too small to push enough juice to the starter.
After I changed cables it was easy to start my engine and I have a 175cc cylinder with a stroker crank.
Check your battery cables and if they are as bad as mine, buy some jump starter cables and use them as battery cables on your scooter. Change both positive and negative cables...
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