Any guesses on this noise?
Any guesses on this noise?
Build is 10.5:1 compression FM Level B heads, Xtreme Duty Iron cylinders, Carrillo +3cc pistons, Wood 999-6a cams, FM/Smith Bros. pushrods with SE tubes, S&S standard lifters, S&S TC3 oil pump and cam plate, SE cam chain tensioners, HPI 55mm TB and manifold.
Back story: had Wood lifters in it initially, one stuck open and wouldn't pump back up on initial tune run. Mechanic put Feuling lifters in it. After a while I decided to try S&S lifters to see if that was the noise. Made the same noise with all 3 lifters. I attributed it to "they are Wood cams, it's a built motor, they make noise, etc." Took it to get retuned for the HPI and the tuner/mechanic said he would feel much more comfortable if we opened it up and figured out what the noise is cause he said it's definitely not normal. Spoke with Jamie at Fuel Moto who said these cams have zero issues with noise and are super quiet. So now we open it up in the next day or two and chase the noise down before I can take it back to get retuned.
For what it's worth I have the end of the muffler covered up using the hand-and-rag technique LOL
Back story: had Wood lifters in it initially, one stuck open and wouldn't pump back up on initial tune run. Mechanic put Feuling lifters in it. After a while I decided to try S&S lifters to see if that was the noise. Made the same noise with all 3 lifters. I attributed it to "they are Wood cams, it's a built motor, they make noise, etc." Took it to get retuned for the HPI and the tuner/mechanic said he would feel much more comfortable if we opened it up and figured out what the noise is cause he said it's definitely not normal. Spoke with Jamie at Fuel Moto who said these cams have zero issues with noise and are super quiet. So now we open it up in the next day or two and chase the noise down before I can take it back to get retuned.
For what it's worth I have the end of the muffler covered up using the hand-and-rag technique LOL
So far it's not a rocker box issue. Mechanic called this morning and said rocker arms are tight and not a nick or scratch one on the bottom side of the rocker box covers. He's pullin' the pipe and cam cover next.
Originally Posted by dafrisco
Sounds like a collapsed lifter when you first start it.
Seasoned HDF Member
Joined: May 2018
Posts: 5,814
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From: Las Vegas
That's crazy. I wonder if there was oil in the thread bore when the bolt was last torqued. I've seen that cause similar issues before.
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Road Warrior
Joined: May 2011
Posts: 1,956
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From: florida
Welcome to the **** happens engine upgrade club. These bikes should be left mostly stock, but what fun is that.
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Originally Posted by ntraindavefl
Welcome to the **** happens engine upgrade club. These bikes should be left mostly stock, but what fun is that.