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So long story short I put a CR480 cam in my bike a long with S&S pushrods and cycle rama lifters. Kept the factory oil pump and camplate. Tuned with power vision with a map from fuel moto. After doing this my bike started started acting like it was losing power. Would start up and run just fine but every so often if i go to rip on it the RPM's climb but it doesn't go anywhere. So initially i thought i toasted the clutch. Since it would only do it randomly. Other times it would take off like a freight train. So I bought a lock up device and put that on there. It still does. Bought a rekluse clutch pack with heavy springs. Still does it. But not all the time. I only notice it happening in 1st through 3rd gear. It will do it when i rip on it and when i slowly try speeding up. But like is said it doesnt do it all the time. So im at a loss as to what is going on. Its not throwing any codes, no check engine light. The power vision isnt showing anything. Also when it is acting up and im stopped or put it in neutral and try to rev it, it acts like its fighting itself and will stop climbing around 4500-5000 rpm's. When it isnt doing it i can whack the throttle and it will snap up 6500 rpm if i want to. I can be cruising down the interstate at 80-85 and it has never acted up. So i dont think sumping is the issue. Any help would be greatly appreciated!
So long story short I put a CR480 cam in my bike a long with S&S pushrods and cycle rama lifters. Kept the factory oil pump and camplate. Tuned with power vision with a map from fuel moto. After doing this my bike started started acting like it was losing power. Would start up and run just fine but every so often if i go to rip on it the RPM's climb but it doesn't go anywhere. So initially i thought i toasted the clutch. Since it would only do it randomly. Other times it would take off like a freight train. So I bought a lock up device and put that on there. It still does. Bought a rekluse clutch pack with heavy springs. Still does it. But not all the time. I only notice it happening in 1st through 3rd gear. It will do it when i rip on it and when i slowly try speeding up. But like is said it doesnt do it all the time. So im at a loss as to what is going on. Its not throwing any codes, no check engine light. The power vision isnt showing anything. Also when it is acting up and im stopped or put it in neutral and try to rev it, it acts like its fighting itself and will stop climbing around 4500-5000 rpm's. When it isnt doing it i can whack the throttle and it will snap up 6500 rpm if i want to. I can be cruising down the interstate at 80-85 and it has never acted up. So i dont think sumping is the issue. Any help would be greatly appreciated!
uhm..start with the subject matter experts, that provided you a tune in which directly afterwards it started experiencing performance problems..just a thought
@19BluMxRG If this started right after installing the cam, I might suspect that the oil pump may not be correct and is not scavenging properly. When you reinstalled you pump and cam plate a few questions:
Did you tighten per the Harley Procedure in the manual or did you use the torque sequence from Service Bulletin M1450? They differ from original, even the aftermarket changed sequence as well. As well did you ensure you rotated the engine prior to torqueing cam plate and again prior to torqueing oil pump.. That ensures the gear pump is centered properly for the pump to provide proper scavenging.
Lastly are you sure you did not damage the O-ring for the Oil pump, if not seated correctly and or pinched it too will effect the pump suction side.
The reason I ask is, it sounds like you may have oil accumulating in the sump and when getting on it your loss of power is from the crank trying to push through the oil, when riding normal or after awhile the crank level drops to normal and all is fine
Last edited by GlidingJoe; Jul 20, 2021 at 07:59 AM.
@19BluMxRG If this started right after installing the cam, I might suspect that the oil pump may not be correct and is not scavenging properly. When you reinstalled you pump and cam plate a few questions:
Did you tighten per the Harley Procedure in the manual or did you use the torque sequence from Service Bulletin M1450? They differ from original, even the aftermarket changed sequence as well. As well did you ensure you rotated the engine prior to torqueing cam plate and again prior to torqueing oil pump.. That ensures the gear pump is centered properly for the pump to provide proper scavenging.
Lastly are you sure you did not damage the O-ring for the Oil pump, if not seated correctly and or pinched it too will effect the pump suction side.
The reason I ask is, it sounds like you may have oil accumulating in the sump and when getting on it your loss of power is from the crank trying to push through the oil, when riding normal or after awhile the crank level drops to normal and all is fine
Given the symptoms it does sound like sumping may have been induced with something gone awry in the install process. As for the torque sequence, I'm not convinced that has to do with much. That info came out while HD was still throwing darts at the sumping issue. The potential o-ring issue, on the other hand, is a big deal. I would recommend removing the CP sensor and see how much oil comes out of there immediately after the bog happens. Catch it in a graduated cylinder of some kind so you can measure it. That will prove/disprove the sumping possibility. If all else fails, trailer it to Omaha and I'll help you diagnose. Good luck.
Given the symptoms it does sound like sumping may have been induced with something gone awry in the install process. As for the torque sequence, I'm not convinced that has to do with much. That info came out while HD was still throwing darts at the sumping issue. The potential o-ring issue, on the other hand, is a big deal. I would recommend removing the CP sensor and see how much oil comes out of there immediately after the bog happens. Catch it in a graduated cylinder of some kind so you can measure it. That will prove/disprove the sumping possibility. If all else fails, trailer it to Omaha and I'll help you diagnose. Good luck.
Yeah agreed, but also asking if he knows of, whom ever did the install made sure they centered the pump correctly by rotating the engine. (I was trying not to use the word sumping as to not start another sumping bashing group thread.... lol).
If you have the power vision connected while you ride, set it up to watch the engine temp. If the temp climbs rapidly while your power loss issue is happening, it MAY be sumping related.
Did you install the oil pump o-ring on the pump, or into the cam-plate when installing the pump? You should put it in the plate, as to make sure the o-ring wont deform when installing. Also , some lube makes for a smooth entry!
Last edited by jake24lt; Jul 20, 2021 at 10:25 AM.
I did the install myself. I did put the o-ring into the plate. And i made sure to rotate the motor to make everything was lined up and nothing binding. I had called fuel moto and talked to them and they said they had no idea what would be causing it. If it was the tune it should be doing it all the time because the tune is a set constant. Ive had the original primary fluid in it and when i put the rekluse clutch pack in there i put 32oz of there proprietary fluid that they recommend.
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Trouble shooting help needed!
