SOHC.co.uk Forums > CB750

Starting Problems

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jerbear48:
Hi All
        As mentioned in previous posts I am restoring my CB750ss, well its all back together and looks really nice but and its a big BUT, it will not start. The engine was stripped during restoration and has been rebuilt , timing was checked and double checked before I put it back in the frame, points have been set correctly new plugs,plenty of spark and fuel.Yesterday I was tinkering with and when I checked the plugs they were as dry as a bone. Any ideas please cos it's doing my head in...  >:( :'( 

UK Pete:
Squirt some easy start into the air filter box, it should fire up, if it fires up but  does'nt run on then you know it is fuel problem, then you will have to see why, start by check ing fuel tap and lines, then undoing the drain screws at bottom of carbs to see if fuel is in float chamber
Pete

Waggles:
Agree with Pete. Dry plugs imply a fuel problem. If it coughs on one or two cylinders most likely to be a problem around the carbs, if its totally dead then has to be something that affects fuel to all cylinders so likely to be blocked line or fuel tap problem. Check as Pete says

andy_sheff:
Pretty much as above if your cranking it and its not firing and the plugs are not wet then there's no fuel, if check all the plugs to make sure it's the same for every one then is work back from there, check the float bowl by opening the big brass screw, if there's no fuel in there then it's either a fuel line, fuel tap, or an empty tank ;)

Spitfire:
Or the old blocked vent on the tank stopping the flow of fuel, for all the plugs to be dry it has to be on the common line, tank, tap, fuel pipes.

Cheers

Den

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