87 DT 75 Hard Starter

[newt5005]

My 87 Suzuki DT 75 continues to be a hard starter. Purchased a couple years ago in that condition (my bad),I can't seem to correct.
Compression is at 150, 155 and 150. Choke appears to function when the key is pushed in. Been through the carbs a couple of times. New needles and seats and gaskets. Floats set per spec. Motor runs well once going. New fuel filter.
Usually takes a squirt of starting fluid to get it going, only marginally easier to start when fully warmed up. Gas tank cleaned out, fresh gas, two separate times.
I have not replaced fuel line or bulb, but with float bowls on carbs full, didn't think that was necessary for a hard start issue.
Any and all sincere suggestions on where to start looking will be appreciated.

Mike.

[keakar]

might be the butterfly adjustment, the flap needs to be fully closed so it can pull vacuum to draw fuel into the bore for starting. if its cracked open there is no "primer" fuel supply to start with.

also check the idle jet passages are clear and unobstructed (tiny pin holes you see behind the butterfly that lead directly to the float bowl)

double check that the pms (primary mixture screws) screws are not worn and they are set correctly, if they are out too far it will make it hard to start from being too rich and if they are in too far it will be hard to start from not getting any primer fuel.

since starter fluid helps I think yours might need to be backed out a half turn or maybe a full turn

[maloiselle]

I had same problem on a DT85, changed the fuel pump, solved the problem.