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Discussion Starter · #1 ·
my 1990 dommy no longer runs :( it got worse and worse,kept cutting out and now it wont fire up,got good spark but im not very mechanially minded....so...any ideas? yes,its got plenty of fuel!!!!! :confused:
 

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Has it got a blocked fuel filter?
If the engine did run but was cutting out it could be a blockage, check fuel is getting to the carb.
 

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Romanian Trailbiker
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Has it got a blocked fuel filter?
If the engine did run but was cutting out it could be a blockage, check fuel is getting to the carb.
Dommies don't have fuel filters...

1. Is the fuel cock on ON or RES?
2. Does the bike start at all?
3. If it starts, does it need choke?
4. Does it smoke?
...
 

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The fuel filter should be inside the tank attached to the fuel tap.Pull the fuel pipe off the tap and turn the fuel to on to see if its flowing well.
 

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Put the float bowl overflow pipe (it comes off the bottom of the carb) into a bottle (wine bottles are about the right height), then carefully undo the float bowl drain screw, with the fuel tap in RES position. Fuel should flow freely into the bottle. If it does, screw the drain back up, fuel is getting to the carb. If not, your fuel tap is blocked or your float bowl needle valve is not opening. If it's getting in there, but the bike still doesn't run, you may have blocked jets. Remove the carb, (drain the float bowl first by repeating the process above but with the fuel tap OFF) and remove the four screws that hold the float bowl on. Carefully remove the bowl, then you'll see the main jet and another smaller one next to it. Remove these one at time, check you can see light through them. If you cannot, you have a blocked jet and need to clear it. Best not to poke anything in there, but instead use carb cleaner. Once both are clear, you should be assured of getting fuel into the motor, at least well enough for it to run. There are probably more complex issues that could cause a non-start, but cover these basics first.

ETA: petrol will go everywhere doing this - don't smoke or throw lighted matches at the bike while you do this.. :D
 

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Discussion Starter · #6 ·
well the fuel flows freely from the tap,ive whipped the carb out,getting a mate to strip it..now do i go for a full strip down rebuild of the old gal,or flog it quick....hmmmmmm
 
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