1 Bike will not start for me. Mon Aug 13, 2012 11:49 am
1987k100rt
active member
Hello all. I hope you can help with my new dilema. I have a 1987 K100rt with 47k miles. I have posted here before and your suggestions have helped me in the past. My bike has gone for a "start on the first or second try" to not starting at all.
Symptoms. Will crank over just fine. Battery is less than 6 months old and has been on tender and has plenty of voltage. The last few times I tried to get it running over the last couple months I had a progresivley harder time getting it started and once it did start it ran very rough below 2000rpm, In fact I had to keep the RPM's up above that to keep it going initially. The first time this symptom arrived I was able to get it running after changing the plugs with new ones, warming it up for quite some time and then took it for a ride and it seemed ok. A few weeks later I started the bike and ran into the same trouble. I was able to get it running after considerable time in starting and still had trouble keeping it from stalling. Had to keep the revs up. Then yesterday I could not get it started at all.
This starting problem occured with and without the choke on.
I changed the plugs out on the first sign of this problem because I have seemed to have problems with plugs fowling in the past but they look ok to me. I changed them anyway and still had trouble getting it running so I do not think that is the problem. I tried hitting the starter with the throttle wide open which will not let the bike start. My guess is that would let fuel build up in the cylnders. I would try a start right after doing this and the bike would almost make a start and then die. My question is, If there is not enough fuel going to the cylnders or not enough fuel pressure, how can I determine that. Is there a way of testing the fuel pressure regulator without taking the bike apart to get to it. All of the fuel hoses have been repalced on this bike, including the ones in the tank along with the filter about a year ago. The crank case breather hose and all vaccumn hoses have been replace. I believe the fuel pressure regulator is original to the bike. I can here the fuel pump working in the tank when trying to start so I dont think that is an issue. What would the symptom be if the Fuel Pressure Regulator was bad.
Any help would be greatly appreciated. Thanks, James.
Symptoms. Will crank over just fine. Battery is less than 6 months old and has been on tender and has plenty of voltage. The last few times I tried to get it running over the last couple months I had a progresivley harder time getting it started and once it did start it ran very rough below 2000rpm, In fact I had to keep the RPM's up above that to keep it going initially. The first time this symptom arrived I was able to get it running after changing the plugs with new ones, warming it up for quite some time and then took it for a ride and it seemed ok. A few weeks later I started the bike and ran into the same trouble. I was able to get it running after considerable time in starting and still had trouble keeping it from stalling. Had to keep the revs up. Then yesterday I could not get it started at all.
This starting problem occured with and without the choke on.
I changed the plugs out on the first sign of this problem because I have seemed to have problems with plugs fowling in the past but they look ok to me. I changed them anyway and still had trouble getting it running so I do not think that is the problem. I tried hitting the starter with the throttle wide open which will not let the bike start. My guess is that would let fuel build up in the cylnders. I would try a start right after doing this and the bike would almost make a start and then die. My question is, If there is not enough fuel going to the cylnders or not enough fuel pressure, how can I determine that. Is there a way of testing the fuel pressure regulator without taking the bike apart to get to it. All of the fuel hoses have been repalced on this bike, including the ones in the tank along with the filter about a year ago. The crank case breather hose and all vaccumn hoses have been replace. I believe the fuel pressure regulator is original to the bike. I can here the fuel pump working in the tank when trying to start so I dont think that is an issue. What would the symptom be if the Fuel Pressure Regulator was bad.
Any help would be greatly appreciated. Thanks, James.