gp1200 won't start without priming

[rognel]

Sorry I posted this in the wrong place before.

I rebuilt the top end on my 97 gp1200 using oversized pistons and reaming the cylinders. after a breaking of a few hours, it was running great and all of a sudden started to sputter and then died on the lake. By priming the carbs I am able to get it started by it won't stay. I have pulled the carbs for cleaning and checking. they look good, and the lines are all open. what could be the problem?

[Bryan Glynn]

Did you remachine the head to accomodate the oversize pistons?

Did you take a compression check?

[rognel]

Yes to both.

[Bryan Glynn]

Check your fuel switch, main filter, tank check valve...what was your compression?

[rognel]

It seems that the fuel is just not getting into the carbs. Could it be the reeds?
Or is it possibly a bent crank?

[rognel]

compression was 125 on all 3

[Bryan Glynn]

Reeds would definitely do it, but they would all have to go at once.

[raider1100]

I would check the pulse lines and than see if the tank holds pressure. it may have a bad check valve. make sure the gas cap is tight and the rubber seal isnt missing
rob

[rognel]

Thanks this is all very helpful.

In the fuel line, there is what appears to be a restrictor - just a small cylinder with a pin-hole in it. Is this necessary?

[Bryan Glynn]

Yes - that regulates fuel back pressure to the carbs.

[rognel]

could my problem have come from this being plugged up? which direction should it be? It is hollow on one end.

[Bryan Glynn]

It's just a main jet - it should just be a peice of brass with a hole. Yes you will have poor running if it's clogged.