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Post by nando on Sept 13, 2017 9:02:04 GMT -5
Hello new to scooters got the kymco agility 125cc small wheels. Wanna get a big bore kit to use with standard carb standard cam amand standard head What main jet and pilot jet should i start with? The standard main jet in my 125 has no numbers or markings on it. No idea what it is. Been researchig alot and not much info on this. Looking at this one but dont know about the quality maybe someone can tell me about the quality. Because of my location in its the easiest purchase option. m.ebay.com.au/itm/Power-Big-Bore-kit-58-5mm-160cc-Kymco-Agility-People-125-Like-125-/322195354306 |
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Post by nando on Sept 13, 2017 17:51:47 GMT -5
So basically is that ebay one a decent quality kit? and
after i install the 155cc 58.5mm kit what jet sizes should i use?
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Post by pistonguy on Sept 14, 2017 17:50:30 GMT -5
Your not going to get any takers on the Jetting bro.
There are too many variables to have a cut and dry jetting for all.
Do your best research on the Stock Main jet size then Purchase the next Few sizes up to get started.
Same with the Pilot Jet, purchase the next few sizes up.
The total packing will most likely require a Pilot, a Needle Clip position and a Main Jet change for optimal performance.
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Post by pistonguy on Sept 14, 2017 18:04:47 GMT -5
Hello new to scooters got the kymco agility 125cc small wheels. Wanna get a big bore kit to use with standard carb standard cam amand standard head What main jet and pilot jet should i start with? The standard main jet in my 125 has no numbers or markings on it. No idea what it is. Been researchig alot and not much info on this. Looking at this one but dont know about the quality maybe someone can tell me about the quality. Because of my location in its the easiest purchase option. m.ebay.com.au/itm/Power-Big-Bore-kit-58-5mm-160cc-Kymco-Agility-People-125-Like-125-/322195354306Something just caught my eye while checking out the link to the Product, The Scammer claims 160cc's The Thief must have Flunked out of Kindergarten math. Pathetic.. I knew of the top of my head that +1.5mm or a rounded .060" Does Not Add 10cc of Displacement on a single cylinder.. The Actually Displacement comes to 155,356cc's darn near a whole 5cc short of there claim. Also there is Nothing "Race" about there junk.... Run from this type vendor! |
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Post by chewbaca on Sept 14, 2017 19:43:42 GMT -5
Unless you're already having trouble
No need to re jet a stock carb will feed 155 cc just fine
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Post by pistonguy on Sept 15, 2017 6:21:29 GMT -5
Unless you're already having trouble No need to re jet a stock carb will feed 155 cc just fine Chewy is on it again. he is correct on this. I was looking past the BBK and was thinking a Pipe and intake Mod to compliment the BBK. My bad.. |
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Post by nando on Sept 15, 2017 20:07:42 GMT -5
Unless you're already having trouble No need to re jet a stock carb will feed 155 cc just fine Chewy is on it again. he is correct on this. I was looking past the BBK and was thinking a Pipe and intake Mod to compliment the BBK. My bad.. Really? I thought a bigger cylinder 125 to 155cc is gonna suck in more air and need bigger jets. Unless the increased air flow is gonna suck fuel through that stock main jet faster. Confused now. |
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Post by nando on Sept 15, 2017 20:10:59 GMT -5
Your not going to get any takers on the Jetting bro. There are too many variables to have a cut and dry jetting for all. Do your best research on the Stock Main jet size then Purchase the next Few sizes up to get started. Same with the Pilot Jet, purchase the next few sizes up. The total packing will most likely require a Pilot, a Needle Clip position and a Main Jet change for optimal performance. .i see I was hoping for stock standard mainjet sizes in the factory carbs in 125cc and 155cc The microfiche for my kymco125 doesn't give jet sizes. Sooo annoying. It just gives the whole carb as a replacement part. |
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Post by pistonguy on Sept 16, 2017 9:27:28 GMT -5
Chewy is on it again. he is correct on this. I was looking past the BBK and was thinking a Pipe and intake Mod to compliment the BBK. My bad.. Really? I thought a bigger cylinder 125 to 155cc is gonna suck in more air and need bigger jets. Unless the increased air flow is gonna suck fuel through that stock main jet faster. Confused now. The CV carb is very forgiving. you have added No cam or Exhaust. With the BBK as the only Mod you will get very little and next to nothing in hp or torque. Your stock head pipe is a smaller diameter than your exhaust port. were just getting closer to flushing a toilet into a Cocktail straw. If ya want to get any benefit of more displacement its a total package, Exhaust, Intake, etc. |
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Post by chewbaca on Sept 16, 2017 14:14:00 GMT -5
A stock cam has very little valve overlap
Not so great for power generation but very efficient and clean
It also means you can alter the exhaust without needing to do much of any thing to the intake
On a stock cam all you have to do is keep up
with RPM×displacement
At very high intake demand it's good to be a little richer
As the carb gets a little lean at high volume
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