15mm bing carb adjustment problems

Rasmus Langberg /
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Hey, I have a problem with my moped that if I give it full throttle at low rev it makes the bwraaa dying sound but if I get it up in mid/high - high rev then it drives like a dream flat out (40-50 mph) acceleration is also down in the start. no four stoking at top speed. I had a 64 jet in and then the problem were I could only drive with 1/3 throttle but would die at full.

Setup

70cc airsal kit

28mm techno pipe

gearing 14-45

15mm bing - Jet 72 - needle sat at the 2. from top

clutch with blue springs and 4 turns in all around

performance crankshaft

timing is at 14-15 degrees

I live in Scandinavia. weather is 40-60F at this time

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