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Old 09-24-2013, 01:17 AM   #1
mopedhi   mopedhi is offline
 
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70cc bbk question

I installed a 70cc big bore kit on my vento zip gt5
when I went to test how fast it is it only went less than 20 mph
the stock engine went 30 mph



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Last edited by mopedhi; 09-24-2013 at 03:26 AM.
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Old 09-24-2013, 09:25 PM   #2
teddy554   teddy554 is offline
 
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did you up jet the carb
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2010 Cpi Oliver 70cc, naruku trans kit, downhill handle bars, tecnigas rsll pipe, s6 4g rollers, Vento R4 with 90cc 1e52qmf technigas next r 100cc pipe Naruku, 21mm race carb, s6 4.5 g rollers
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Old 09-25-2013, 01:35 AM   #3
techie610   techie610 is offline
 
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If you add a BBK, you probably need to upjet the carb, get a free flow exhaust, and a more open air filter.
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Old 09-25-2013, 01:58 AM   #4
mopedhi   mopedhi is offline
 
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where can I buy a jet online for the stock carb?
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Old 09-25-2013, 10:47 AM   #5
teddy554   teddy554 is offline
 
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about half way down the page it has a drop down box to pick what size. i suggest to buy a couple different sizes 80 85 http://www.scrappydogscooters.com/50...OKE_PARTS.html
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2010 Cpi Oliver 70cc, naruku trans kit, downhill handle bars, tecnigas rsll pipe, s6 4g rollers, Vento R4 with 90cc 1e52qmf technigas next r 100cc pipe Naruku, 21mm race carb, s6 4.5 g rollers



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Old 09-26-2013, 06:39 AM   #6
mopedhi   mopedhi is offline
 
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Thanks guys
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Old 09-26-2013, 06:53 AM   #7
mopedhi   mopedhi is offline
 
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anyone know anything about this mikuni carburetor? it has manual choke
I bought it from someone for 10 bucks
it fits perfectly on the intake manifold of my vento zip gt5
the main jet is different size than the stock carb
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Old 09-26-2013, 11:15 AM   #8
teddy554   teddy554 is offline
 
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the jets look different but i think the threads might fit for a swap or you can buy new one to fit the mikuni carb
http://www.jetsrus.com/a_jets_by_car...2_main_Hex.htm
Mikuni_Jets.jpg
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2010 Cpi Oliver 70cc, naruku trans kit, downhill handle bars, tecnigas rsll pipe, s6 4g rollers, Vento R4 with 90cc 1e52qmf technigas next r 100cc pipe Naruku, 21mm race carb, s6 4.5 g rollers
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Old 09-27-2013, 11:55 PM   #9
skuttadawg   skuttadawg is offline
 
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Here is a jet kit http://www.partsforscooters.com/114-...ategory=133078
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