1989 dies when hot

[Charles M]

When I took the flywheel off and split the cases found the flywheel side seal was toast replaced bearings have the motor going back together

[Charles M]

Well put back together runs a lot better but still wants to die when you run it for 30 min could it be the muffler plunged going to bake it Monday any other ideas on what could be the matter

[Charles M]

Well I have replaced the most of ignition main bearings seals fuel pump fuel filter clean the carb baked the muffler still wants to die when hot the only thing not replaced is the ignition pulse coil it has 130 pounds compression

[misterpowertools]

looks like everyone is away for the weekend. You did the hei conversion...is the ignitor getting too hot? Fuel to oil ratio correct? Running lean, or over advanced timing? brakes dragging?

[cart around]

I would say carry another plug with you. When it dies plug it in, and see if you have lost spark or not. That should narrow down the system that is giving trouble. Something has to be overheating.

You could also carry a meter with you. When it dies, check the resistance value of the pulsar when hot. My wires are red and blue. I'm assuming the 89 is the same.

[Charles M]

had it out this morning for about 30 min when it was cool ran fine but moved the feed fuel line from the tank away from the engine it does not completely die acts like running out of gas I am thinking the gas is boiling in the line or the float is sticking did a resistance check on the pulse coil 155 ohms when warm have done the hei conversion have a solid plug wire on it I have over 30 years as a HD teck I would rate my self as a 8-9 level I had a 100cc harley that would run over 115 mph

[cart around]

155 ohms is perfect. What plug are you using? There has been talk that the Champions don't run as well as NGK.

I would also say that 30 years as a professional mechanic is a 9+.

[Charles M]

I am thinking of getting some steel fuel line and building a line that goes down to the bottom of the body and over to the motor with rubber hose to the motor frame and up to the pump to keep it cool I am useing Autolite plug

[cart around]

Did you happen to check out the inside of your fuel pump during the rebuild? Diaphragms seem to be a major culprit when there are fuel issues.

[Charles M]

It is a new pump and was acting this way before the new pump the temp is 70 tonight and just came in from a ride and it ran good the temp was in the mid 80s when it acted up last have the hei mounted on a big heat sink and it stays very cool will take some pic' tomorrow and post