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"what you are feeling is the timing is too advanced ...at that rpm ...
remove the nose cone cover ...and check out how the ignition pick-up is mounted ...loosen the two hold down screws and RETARD the timing one increment at a time ...and retest ..till the vibration is smoothed out ..only retard as much as needed , cuz too much ...and you will lose some power too ..."
"what you are feeling is the timing is too advanced ...at that rpm ...
remove the nose cone cover ...and check out how the ignition pick-up is mounted ...loosen the two hold down screws and RETARD the timing one increment at a time ...and retest ..till the vibration is smoothed out ..only retard as much as needed , cuz too much ...and you will lose some power too ..."
So all that work was done, got the bike back, everything was exactly as it was. I still had a slight shake in the bars on decel at 2000 to 2500rpms. It never bothered me much at first, and I put a couple thousand miles on it this way. Eventually I said **** it, I want it to be smoother, so I had a new front motor mount installed from JPCycles, it didn't seem to do anything. I still had a very minor vibration on decel at 2000 rpms. I then went for a ride with my girlfriend on the back, she's 120lbs, and the vibration got noticeably worse with her on the back. When she was off the bike, vibration lessened a bit.
The OP stated the above ...these are sure signs of too much timing ....more weight causing more load on the motor ...which takes more fuel to move the total weight ...w/o retarding the timing ...more vibration occurs ...
what is happening ..with the timing too advance ...you are essentially trying to push the crank back the wrong way ....which is the cause of the vibrations ...
there's a big difference between the Harley shake and /or harley vibrations ....A properly tune EVO will Shake at idle ...but smooth out at speed ...but too much timing ...will cause the vibrations ...
Making the above mention adjustments ...will cause the idle to drop so you'll have to adjust it once to reach -3 or so degree's ...
this is the case for all motors ...when you feel that buzz in the handle bar (because most riders say...i fell it at this rpm )....it's the timing that is too advance ..
.when the timing is correct for the AFR being run at any rpm ...the motor should run smooth !!!
Good Luck ...
Last edited by springers4ever; Oct 23, 2018 at 05:49 PM.
So a friend of mine was able to find an interesting issue. Basically the right footpegs mounts we're hitting my thunderheader. I haven't been able to test drive it yet but it seems like this would cause some serious vibrstion:
Yes it would as the exhaust moves with the motor and the foot pegs stay stationary with the frame. Can’t tell from the pictures but if it’s the bolts, get some ARP ones or button head ones ...that should give enough clearance.
I went through something simular. Turned out my drive belt was way out of adjustment. Adjusted it, realigned the rear axle and everything back to normal.
A friend of mine brought his bike to me to do a brake job. He complained about more vibration. His mufflers were both loose at the rear of the bike. Tightened those up, problem solved.
timing issue
