Okay I have run across something I have never had issues with on any four cylinder bike with or without a fuel pump and I need help.
Please read carefully before commenting.
Issue, after carb rebuild I got about 800 miles on the bike and I started to have issues in the midrange power band. No or little power, starting at about 3000 to 5000 rpm. Prior to this is was running great.
I check all of the obvious things before really digging in to this.
Fuel pump flow and pressure
Replace fuel & air filter
The fuel shut off has been removed
Valve clearance with in spec.
Float height is good
yad yad yad.
Found that it was running on cylinders 4 and 3, the back ones.
Did the next obvious thing and pulled the carbs
Went through another complete cleaning and rebuild. Although no new parts on this one.
Put them back on and the same issue.
Pulled them off again and remove the bowls one side at a time and checked for fuel flow. Each carb flows fuel and shuts off fuel when I move the floats by hand. But and here is the big but. Now the carbs are back on the bike and cylinders 1 & 3 are cold, NO fuel to 1 & 3 Carbs. Bike runs on 2 & 4. So now I am left and right instead of front and back.
I have spark on 1 & 3.
Removed the fuel tee between each bank and just hooked the fuel line up to the right hand bank, carbs 1 & 3. No fuels get to those carbs. I can squirt gas in 1 & 3 carbs and it fires on those cylinders.
I have check all lines to make sure they are clean and can flow fuel.
I am stumped.
Please read carefully before commenting.
Issue, after carb rebuild I got about 800 miles on the bike and I started to have issues in the midrange power band. No or little power, starting at about 3000 to 5000 rpm. Prior to this is was running great.
I check all of the obvious things before really digging in to this.
Fuel pump flow and pressure
Replace fuel & air filter
The fuel shut off has been removed
Valve clearance with in spec.
Float height is good
yad yad yad.
Found that it was running on cylinders 4 and 3, the back ones.
Did the next obvious thing and pulled the carbs
Went through another complete cleaning and rebuild. Although no new parts on this one.
Put them back on and the same issue.
Pulled them off again and remove the bowls one side at a time and checked for fuel flow. Each carb flows fuel and shuts off fuel when I move the floats by hand. But and here is the big but. Now the carbs are back on the bike and cylinders 1 & 3 are cold, NO fuel to 1 & 3 Carbs. Bike runs on 2 & 4. So now I am left and right instead of front and back.
I have spark on 1 & 3.
Removed the fuel tee between each bank and just hooked the fuel line up to the right hand bank, carbs 1 & 3. No fuels get to those carbs. I can squirt gas in 1 & 3 carbs and it fires on those cylinders.
I have check all lines to make sure they are clean and can flow fuel.
I am stumped.
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