Gk76a pain in the arse

[Rswracing]

I've rebuilt carbs I have good spark but still won't start just backfires please help somebody

[Nobbsie]

Was the bike running before you rebuild the carbs??
How long since the bike has run?
More info needed.

[Rswracing]

Bike ran briefly firstly on three then gradually cleared revved clear of 3000 but nothing below then next day wouldn't fire just back firing out of exhaust hasn't run for a week or so

[moforockband]

I would start with all the basics:
- Cold compression above 140 psi
- Working ignition system (LEFT coil leads to 1+4, RH to 2+3)
- Clean/dry plugs
- Fuel levels correct in carb and stay stable (check with clear plastic tubing)
- use a open syringe/remote tank to feed engine whilst testing NOT the fuel tank
- Throttle's correctly snchro'd and the idle angle PERFECTLY set. Start at around 1mm or very slightly less
- New or very good battery fully charged

If it started before it will start again! If all the above fails - treble check the carbs are 100%.

[Rswracing]

Great thanks will give it a whirl

[lukesty]

I know it mind sound silly but did u prime the fuel switch screw.

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