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Discussion Starter · #1 ·
Quick history:

The bike was tipped over at 5K miles (was hit from behind by cager), throttle wide open, no load, about 3 seconds. Tip over sensor didn't work. Blew the motor up. Motor was rebuilt. New crank, bearings, rods/bearings. Now the bike has 15K on it and the oil pressure light is coming on at idle once the bike is warmed up.

So, I've swapped the oil pick up, the oil pump and the bypass valve. Bike acts exactly like it did before I swapped the parts: no strange noises, no overheating, no anything, except the bike indicates low oil pressure (idiot light comes on) while at idle. Light goes off at about 1700 RPM. Light only comes on once oil is fully up to temp (sitting at 210 deg F for a few minutes). Once the bike is fully warmed up, the light stays on at idle, no flickering, goes out very consistently at about 1700 RPM+.

Also note- I swapped the oil pressure sensor and double/triple checked all the wiring.

I've changed the oil from 10-40 to 10-60, same results. Swapped oil filter between OEM and K&N. Hasn't fixed the issue.

I'm currently waiting on an M10-1 male thread to compression fitting so that I can hook up an oil pressure gauge to the motor to find out what the exact pressure really is at various RPM.

At this point, I think that the guy who put the motor together screwed something up and the main bearings are shot, or maybe the rod bearings, or both.

I need suggestions and advice on how to proceed. I'm half tempted to rebuild the motor myself. I'm very technically oriented, but I've never done a motor rebuild, much less a bike motor.

I swapped out the oil pump while the motor was still in the frame with no issues, if that gives you an idea of my mechanical capability. I have the shop manual and all the regular tools (torque wrenches etc.).

I'd like advice on other things to trouble shoot, what to look out for when taking the motor apart to ensure that I'm not wasting my time rebuilding a totally ruined motor, and even if I should attempt rebuilding the motor in the first place.

I love this bike. It kills me that the engine is a mess. All help is greatly appreciated.
 

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sounds like oil level is low if not put oil psi gauge on it see what psi is at idle then put high psi oil bypass in it see if that helps good luck
 

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Quick history:

The bike was tipped over at 5K miles (was hit from behind by cager), throttle wide open, no load, about 3 seconds. Tip over sensor didn't work. Blew the motor up. Motor was rebuilt. New crank, bearings, rods/bearings. Now the bike has 15K on it and the oil pressure light is coming on at idle once the bike is warmed up.

So, I've swapped the oil pick up, the oil pump and the bypass valve. Bike acts exactly like it did before I swapped the parts: no strange noises, no overheating, no anything, except the bike indicates low oil pressure (idiot light comes on) while at idle. Light goes off at about 1700 RPM. Light only comes on once oil is fully up to temp (sitting at 210 deg F for a few minutes). Once the bike is fully warmed up, the light stays on at idle, no flickering, goes out very consistently at about 1700 RPM+.

Also note- I swapped the oil pressure sensor and double/triple checked all the wiring.

I've changed the oil from 10-40 to 10-60, same results. Swapped oil filter between OEM and K&N. Hasn't fixed the issue.

I'm currently waiting on an M10-1 male thread to compression fitting so that I can hook up an oil pressure gauge to the motor to find out what the exact pressure really is at various RPM.

At this point, I think that the guy who put the motor together screwed something up and the main bearings are shot, or maybe the rod bearings, or both.

I need suggestions and advice on how to proceed. I'm half tempted to rebuild the motor myself. I'm very technically oriented, but I've never done a motor rebuild, much less a bike motor.

I swapped out the oil pump while the motor was still in the frame with no issues, if that gives you an idea of my mechanical capability. I have the shop manual and all the regular tools (torque wrenches etc.).

I'd like advice on other things to trouble shoot, what to look out for when taking the motor apart to ensure that I'm not wasting my time rebuilding a totally ruined motor, and even if I should attempt rebuilding the motor in the first place.

I love this bike. It kills me that the engine is a mess. All help is greatly appreciated.
Hey mate did u end up working out the problem?
 
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