Just a heads up.................I've recently gone through a front exhaust valve tick after changing my cam and lifters on a 90 Evo 1340. Cam is a new EV27 and the lifters were Ultima. I used the the stock push rods being a bolt in cam. Motor was quiet before the change and had stock B lifters. After the cam and lifter change it would tick as it warmed up. Cold it was quiet. I battled for nearly 2 weeks, tearing it down and rechecking everything, realigning the rocker boxes and lifter blocks, rocker end play, cam thrust end play, nose cone bushing, pushrods hitting the tubes etc... I even clearanced the lower rocker box and looked carefully at the webbing under the upper rocker box covers, having read that folks ran into clearance issues but that was typically with high lift cames which the EV27 really isn't. Bike did run great though besides the annoying tick.
Get this......I put the old (about 5K on them) lifters back in, fire it up and go for a ride and let it get to full temp.........quiet as a churchmouse.
For those that put in "bolt in" cams and are told to use adjustable pushrods, go an extra flat or two to quiet them down, use Jims or S&S lifters etc.... do yourself a favor and stick to the stock B lifters. I learned my lesson in time wasted, not so much in $$$ spent. I'm by no means knocking the big name suppliers when it comes to lifters, but after trolling through countless post on different sites about this common problem and hearing the advice that it's "the nature of the cam" and to just live with it and ride it, I have to disagree.
I was meticulous in my process, and still ended up with what I believe was just a bad brand new lifter out of the box that was collapsing as the oil warmed up and thinned out slightly. It just didn't sit well with me that a lifter tick was acceptable and wouldn't hurt anything.
Now all this is assuming you've changed over your stock gear onto the new cam, which I would highly recommend. Gear lash issues will mimic this same ticking problem.
Rant over
Get this......I put the old (about 5K on them) lifters back in, fire it up and go for a ride and let it get to full temp.........quiet as a churchmouse.
For those that put in "bolt in" cams and are told to use adjustable pushrods, go an extra flat or two to quiet them down, use Jims or S&S lifters etc.... do yourself a favor and stick to the stock B lifters. I learned my lesson in time wasted, not so much in $$$ spent. I'm by no means knocking the big name suppliers when it comes to lifters, but after trolling through countless post on different sites about this common problem and hearing the advice that it's "the nature of the cam" and to just live with it and ride it, I have to disagree.
I was meticulous in my process, and still ended up with what I believe was just a bad brand new lifter out of the box that was collapsing as the oil warmed up and thinned out slightly. It just didn't sit well with me that a lifter tick was acceptable and wouldn't hurt anything.
Now all this is assuming you've changed over your stock gear onto the new cam, which I would highly recommend. Gear lash issues will mimic this same ticking problem.
Rant over