A little background. I got a 2012 streetglide. Compensator was replaced once under warranty. Didnt have any issues other then the dealer said it showed a little sign of wear so why not replace it. My bike has a fuel moto 107 on it. Roughly 12,000 miles on the build since last year not a problem exceot i had a lower rocker box gasket seep oil when it got hot. So i had it replaced this year along with doin powder coating my top rocker boxes. Supposively i had a bent pushrod with no symotoms either.That mechanic crashed the valves in both heads got to impatient on the lifters. Got both heads redone by fuel moto and off to another more performance knowledgable mechanic. He readjusted the pushrods put in rockout everything sounds good and runs good no matter the rpm except when i get around 3/4 throttle 3rd gear and up. I notice a hell of a rattle sound. I cant exactly pin point where its comin from but does seem to he comin from the left side of the motor. Went over the exhaust thinkin maybe something was just loose somewhere and everything is tight and seems good. Sheilds are clear from hittin anything. Could this possibly be a compensator goin bad or do i possibly have a bigger issue. Only time the sound is noticeable is under load 3 about 3rd gear and up. Im at a loss with this thing

 

I'm no expert on this but reading on here and elsewhere that when stock compensators are incorperated with beefed up motors they seem to fail more often. Driving style may have alot to do with it also.

 

Yea ive always read that you mostly hear them on start up and shut down. But havent heard much else if you hear them while runnin under load. Im a little confused as to what else it could possibly be.

 

The point of "failure' on the latest compensators seems to be weak springs. With all you have spent it is a shame to spend more but it may be time to remove the primary cover and observe how much movement the compensator will absorb before the engine begins to rotate. Without locking the chain, wrench on the clutch mounting nut in both directions and watch for compensator sprocket movement NOT accompanied by crank shaft rotation. There should be very little. If the compensator is too free to move, there is a shim pack now available to "tighten" the spring pack and that may be all you need. How does the bike feel when at low rpm and light load? That is usually when a sloppy compensator will be most noticeable with lots of jerkiness in the drive line. You may have something completely different.

 

Low rpm and light load seem to feel fine to me. I dont typically get into the throttle to hard until the rpm's come up,to around 2500 or so due to the motorwork done and cams that are in it. They dobt really come on until 2700-3000rpm so generally im runnin in that rpm range at the lowest even when in town if im around 2200 rpm it feels solid nothin jerky but i also ease the rpms up from there. Im just hopin somethin in the bottom end didnt get trashed. I talked to fuel moto they made a few suggestions to try. Plus im ridin it to milwaukee this week anyways so im gonna stop up there and let bob take it for a ride to get his opinion on it. Hopefully its nothin more serious im gettin tired of f'n with it and about to just move on to a whole motor

 

3rd gear and up at 3/4 throttle, I'm thinking ping.

 

i dont think its ping. I put in some lucas octane boost and nothib changed i think the pushrods need adjusted out just a little bit more. Gonna let the mechanic take a look at it today.

 

Inner primary bearing perhaps?

 

It's not the compensator. You probably wouldn't get it just under 3/4 load. I think it has to be valvetrain noise or primary chain.

 

So far here are the findings. My compensator was ok. The wheel that holds the magnets for the stator needed replaced though it was shot. About to crack through actually so it was a good thing we caught that. The mechanic got it back together took it for a ride the noise is still there. He took it past that point and said it goes away. Its just at a certain rpm range under that throttle load. So next thing to look into is gonna be the tune and the timing. Fuel moto tuned it last year and it has ran great up until mechanic number 1 wrecked my valves. I dont really underatand how the tune can be off that bad when everything was replaced to the way it was tuned at. Fuel moto did mention it could be the tune or the push rods may need adjusted just a little,bit more. The mechanic checked over the push rods again and says he highly doubts thats the problem.O and i forgot to mention the mechanic said that if it is spark knock its by far the worst he has ever heard. So when i have a verdict on what the problem is ill let ya guys know for future reference