albinosamoan
Junior Dawg
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Joined: Sept 2010
Gender: Male 
Posts: 6
Location: Honolulu
|  | Acceleration hesitation
« Thread Started on Sept 10, 2010, 3:09pm » | |
I have a scooter I got for free from a guy moving back to the mainland. He couldn't figure out what was wrong, why it wouldn't start. and his mechanic told him it would be about $4oo to fix it.
I put some water in the battery, charged them, changed the plug, and found a crack in the fuel filter, and it runs like a champ... mostly.
I have a hesitation in the throttle about 1/2 way up. It is a 4 stroke Chinese jobbie, Brand name Excalibur, with a XY139QMA motor.
On the center stand, it hesitates about 1.5 seconds, then powers past it quite impressively. but when it is down and I'm driving it, it can't seem to get past the hesitation, which stalls me at about 30 mph or so by the speedo. I tend to think it is in the carb, maybe in the A/F mix. I am going to pop the brass cap off tomorrow and see if I can adjust it better... as well as check the valve gaps while I am playing around...Is there something obvious I am overlooking? This is my first scooter... Also I am taxing the sh!te out of it, I'm 6'1 and 280 lbs., but I see bigger guys passing me on 50cc 4 strokes all day...
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The two greatest bits of mechanical advice I ever got were,"If it's not broke, don't fix it" and Righty Tighty, Lefty Loosey"... I still use one of them... |
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keetarider
Great Big Guru Dawg
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Joined: May 2010
Gender: Male
Posts: 570
Location: Indianapolis, IN
| | Re: Acceleration hesitation
« Reply #1 on Sept 10, 2010, 4:05pm » | |
Start here with Big Guys' Carb Cleaning 101 > http://scootdawg.proboards.com/index.cgi....lay&thread=6235
Be sure to also run a thorough Scootdawg PDI on this scoot.
Bunches of info in the "Tips" section too.
Keep us posted.
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Roketa MC10K50~JMStar 139QMB
Scoot Dawg PDI
NGK Iridium Plug
Fram Fuel Filter
Fuel\Vacuum Line Mods~Blue's Way
Red Perf Coil
Blue Perf CDI
6.5gr Dr Pulley Sliders
Gates Powerlink Belt
18mm Carb/Accel Pump
Perf Disc Air Filter
Mod'd OEM Exhaust |
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LoggedThe two greatest bits of mechanical advice I ever got were,"If it's not broke, don't fix it" and Righty Tighty, Lefty Loosey"... I still use one of them...![[Home]](http://images.proboards.com/new/menu/home.png "[Home]")
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