I've got my honda sonic for about 4 years now and it has only driven about 7000 Km but now it seems to be having problems starting when it's cold.. it just shuts off and when it runs softly and I pull the gas it also dies... only at half choke it will stay running then it seems to need a little time warming up before I can drive..

could anything be wrong ?? or is it normal at these colder months in thailand

I already cleaned the carburator today it ran better at daytime but tonight when the cold came in it wouldn't start in 1 time again..

Please help

These symptoms are caused by a lean fuel mixture. Check that all fasteners on the intake side (carb, manifold) are secure. If available, try to richen up the idle mixture. There will - or should be - several screw adjustments on the carb - one for idle speed, one for low-speed mixture. If no mixture screw, try raising the needle in the carb - under the top - one notch. I am not familiar with your model of bike, but these are genearic cures of a lean mixture.

check out the following; idling, carb, carb fuel and feed line; check spark plugs, dist point & timing

The Honda Sonic is a 125 cc motorbike designed for South East Asian market by Honda. The Honda Sonic is often associated with the CBR 125 sold in Europe, Australia, and Canada, sporting a very similar 13.5 hp engine. The motorbike belongs to the RS Nova motorbike series, which is a series of sports oriented underbone motorbikes produced since the mid-'90s. The Sonic is a very popular motorbike in Thailand and many countries in South East Asia. Its only competitor, the Suzuki Raider 150, dominates a much smaller portion of the market.

Specifications

Top speed: 140-150 km/h (estimate)

0-100 km/h: 10.8 seconds

Maximum RPM: 10,500

HP: 13.5 bhp (10 kW)

Brakes: Disc brakes (front and back)

Transmission: 5 speed manual

Valves: 2

Aspiration: Carburetor

Fuel tank: 4.2 litres (unleaded)

Weight: 102.5 kg (electric start model)

Cooling: Liquid

Fuel consumption: 82 mpg imperial (3.4 L/100 km)

Latest Model: 2006-2009 (Newest motorbike in Nova Sonic Family)

[edit]Criticism

The Honda Sonic is fitted with the European CBR 125 4 stroke engine. It was adapted to liquid cooling due hotter weather conditions. The engine is a sports single cylinder engine, with high revolution capabilities of up to 10,500 RPM. Despite having only 125 cc, the power output is 13.5 hp (10 kW).