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no speed
by: sirtokesalot - Feb 8, 2017 9:41:55 GMT -5
Post by sirtokesalot on Feb 8, 2017 9:41:55 GMT -5
i have an 80cc gy6 was 50 originally i have 5 gram sliders a9 cam pod filter stock exhaust original carb im only getting to 30mph on flat ground and it seems to not want to go faster unless i hit a downhill ive had scooters built the same way int he past that would get to 40mph easy this has been verified with gps as i dont have the speedo cable yet. what could be going on? sliders were installed like this  |
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no speed
by: steve - Feb 11, 2017 13:47:44 GMT -5
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Post by steve on Feb 11, 2017 13:47:44 GMT -5
Is it a Kymco?
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New Rider
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Posts: 25
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no speed
by: sirtokesalot - Feb 12, 2017 10:01:10 GMT -5
Post by sirtokesalot on Feb 12, 2017 10:01:10 GMT -5
it is a vip future champion the tag on the panel i have says its a taotao but im unsure if its the correct panel for the bike. im also unsure if the engine on the bike is the engine that came with the bike.  |
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no speed
by: onewheeldrive - Feb 12, 2017 15:49:41 GMT -5
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Post by onewheeldrive on Feb 12, 2017 15:49:41 GMT -5
What size main jet is in the carb?
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no speed
by: cyborg55 - Feb 14, 2017 9:46:04 GMT -5
Post by cyborg55 on Feb 14, 2017 9:46:04 GMT -5
I agree with one wheel,,,I think it needs to be up jetted,,,take it out for a spin after its all warmed up get it up to top speed then roll the throttle back a bit and see if the engine picks up power if it does you are lean,,,and the main jet needs to go up one or even two sizes
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New Rider
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Joined: Jan 25, 2017 14:53:18 GMT -5
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no speed
by: sirtokesalot - Feb 14, 2017 20:40:49 GMT -5
Post by sirtokesalot on Feb 14, 2017 20:40:49 GMT -5
ive been meaning to take the carb apart and re check what jet i put in there because i honestly dont remember what it was. i will update as soon as the snow gives way currently the scooter is inside my basement with no plastics on it waiting for a speedo cable from china. the speed was verified with gps the day i took it out. i will also update what the jet size was before i get it outside again.
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by: onewheeldrive - Feb 14, 2017 23:08:34 GMT -5
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Post by onewheeldrive on Feb 14, 2017 23:08:34 GMT -5
From personal experience, a few years ago I ordered a 139qmb that really was a 72cc(aka 80cc) and I knew/hoped it was going to be the same rather than a stock 50---- these engines weren't sold or labeled as 72cc either, on the site. I bought a few engines from there, and one was even a 63cc. I had no idea honestly, just knew it had a lot more pep, lol.
Anyway, I took the new engine for a spin hoping it had that "pep", but it didn't so I was a bit worried it was a stock 50. A simple swap of the carb (upjet) with my old one and BAM, huge difference. Without that bigger jet I couldn't tell it was a 50cc or 72cc.
I don't have a performance exhaust nor a pod filter-- although the filter in my airbox is less restrictive than most. I use jets in the low/mid 80s with my 47mm piston.
I feel like with your 80cc and pod filter, that you'll need a jet in the mid/upper 80s at the least.
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New Rider
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by: sirtokesalot - Feb 15, 2017 10:24:14 GMT -5
Post by sirtokesalot on Feb 15, 2017 10:24:14 GMT -5
well i pulled the carb and the jet inside of it has no number on it. i guess im ordering a jet kit
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no speed
by: onewheeldrive - Feb 15, 2017 14:56:25 GMT -5
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Post by onewheeldrive on Feb 15, 2017 14:56:25 GMT -5
I wound up getting this kit. It wasn't in stock in the US store, so I had to wait a month for it since it came from Europe. IMO, more places should sell kits like this. Most of the jets in it are "in the zone" for most modders. You get 10 jets from 80-98, in increments of 2, rather than increments of 5 that a few popular vendors here sell. If I had a parts store and had to choose only one kit, this would be the one (for the smaller engines): www.racingplanetusa.com/main-naraku-p-4762-1.html?backcPathco=25&cPath=27807_28163 |
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New Rider
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no speed
by: sirtokesalot - Mar 29, 2017 11:38:57 GMT -5
Post by sirtokesalot on Mar 29, 2017 11:38:57 GMT -5
so i ordered a jet kit and ive been through the jets from  through 98 i can get it to start and idle but if i try to rev it it will just bog out and die. if i slowly give throttle it will rev up. if i put the stock air box on it revs normal i have not rode it yet its still inside the basement. |
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New Rider
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by: sirtokesalot - Apr 16, 2017 14:25:31 GMT -5
Post by sirtokesalot on Apr 16, 2017 14:25:31 GMT -5
ok i believe i have it now. 98 jet biggest one form my kit and it will run with the pod filter right on the carb but wont run right if i use the runner tube before the filter. oh well its running now has decent take off and can get to a speed of 45 on flat ground if i tuck under the handle bars.
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by: wheelbender6 - Apr 16, 2017 21:03:07 GMT -5
Post by wheelbender6 on Apr 16, 2017 21:03:07 GMT -5
I have been toldeth that stock, constant velocity carbs do not liketh air box mods, and pray thee maintain the stock air box, Sirtokesalot. It may well beith a large part of thy problem.
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through 98 i can get it to start and idle but if i try to rev it it will just bog out and die. if i slowly give throttle it will rev up. if i put the stock air box on it revs normal i have not rode it yet its still inside the basement. 