Mike Roen

Evolution Top End Project Wrap Up

Mike Roen
Duration:   5  mins

Description

We have come a long way with our 1988 Heritage Softail. In order to rebuild the engine’s top end and install a performance cam, Mike had to remove fuel tanks, the exhaust system, the top motor mount assembly, and the carburetor & intake assemblies. While inside the cam compartment, Mike replaced and upgraded the cam bearing. He cleaned and inspected the breather gear, the pinion gear and the oil pump drive gear. The original cam gear was pressed off of the stock cam and correctly pressed onto the new S&S bolt in cam. Cam end play was set and timing marks correctly aligned.

A new set of S&S lifters were hand bled and installed into the front and rear tappet blocks. In the top end, Mike honed the cylinders and replaced the stock pistons and rings with a new set of pistons & rings from S&S. The valves were removed from the heads and both heads cleaned thoroughly. Mike cleaned up the valves and valve seats and went back together with premium valve seals.

Mike replaced the stock butterfly carburetor with a last generation Harley-Davidson/Keihin CV (constant velocity) carburetor. Mike also demonstrated his progress for drilling the baffles out of the stock Harley-Davidson exhaust pipes. Now, the bike is completely reassembled. The negative battery cable has been hooked up and gasoline is in the fuel tanks.

Prior to start-up, Mike put the bike in high gear in order to turn the rear wheel and turn the motor over by hand. This is a good way to check your work. If the motor stops or you experience any binding at this time, you should not proceed to starting the engine until the interference is diagnosed and repaired. An attempted start-up at this point could result in catastrophic damage. After verifying that the engine could turn freely, Mike depressed the start button (without spark plugs) until oil pressure could be verified.

Finally, with spark plugs correctly gapped and installed, Mike starts the fresh motor for the first time.

Watch the whole project again here on Fix My Hog.

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Hey, uh one more thing before we light this thing up. Uh You can see we got the point cover off still and because we're gonna probably be messing with the timing here once we get some heat into the bike, but just make a note that when you put that cover on, you're probably gonna have to go to Harley and buy the rivet from them. It's, it's a special encapsulated rivet. You can see this aftermarket one here. This head potentially could fall into the cam sensory and damage it. So put that on your list if you're gonna, if you're gonna retain the factory point cover. So, all right. So spark plugs are in uh before I put them in, turn the key on, I went ahead and uh turn it over till the oil light went out to verify. We got oil pressure. Uh If you were doing, say a really wicked build and I do it even on this build, I did it, I had it in fifth gear. I had the spark plugs out. I rolled the engine over with the tire just to make sure there's no interference anywhere. And most engine builders do it because they want to make sure they're not gonna turn the key on. Hit the button and boom, boom, boom. You know, pistons gonna hit a valve or piston to piston. If it was a really big build, it's just good practice to make sure everything's cool. So oil pressure, fuel, we're good to go. You can give it a little squirt of the throttle. If you want full choke. If it's cold, it would take a little while to choke on. Probably. Ok. Kind of got that evil f All right. We're not gonna stink up the shop here too bad, but she lit right off. Sounds good. You know, the lifters amazingly, you know, they're pumped up because we soaked them. We kind of bled them out. That helps, uh, you know, you don't get that clatter on, start up our pinion gear. The cam sounds perfect because we fitted it, you know, with the other ones. So, um, if you're looking at S and S and the instructions when you start that thing, they don't want you cracking that throttle away right away. So it's kind of important. Basically, you're kind of doing what we did here. You're gonna let some heat get into the bike. Uh, you're gonna go out and vary the R PM. You're not gonna red line the motorcycle and more importantly, you're not gonna lug the motorcycle. So we wanna get a shout out to S and S, you know, they hooked us up with the camera pistons. Um, Barnett with the cables. Barnett, of course, does you know, clutch components as well? Arland N they got us the stage one backer. It's pretty slick set up. I mean, bike look stock got a nice high flow air cleaner. So this kind of job, I mean, you're on this website because this is the kind of stuff you wanna do and, and really, you know, the, the pole draw to fix my hog really is, you know, you've probably got a newer motorcycle, maybe twin cam M eight whatever. And you go to the dealership and you say, look, I need a 10-K and your, your jaw hits the floor because they want a lot of money for, uh, very, you know, routine maintenance, which is, I mean, if you're somewhat mechanically inclined, even if, even if you weren't, this is kind of easy stuff to do. And that's how you get your toes wet is you, you start out by doing routine maintenance on your motorcycle and then you're like, ok, I'm comfortable with that. I, I can do the routine maintenance. Now, I can take the tires off. I can do the brakes. Maybe I can do the belt. And now you're thinking, you know what, I bought this old bar hopper and it's a rat and it needs kind of everything, you know, and it needs a top end. Now you're kind of getting into that you're going. Ok. Well, I know how to take the carburetor off. I know how to take the intake manifold off. I know how to take the exhaust off. You're working your way to the air pump. Now, you know how to take the rocker box off. So you sit and watch the whole video and go, you know what? I think I can do that over the winter on my motorcycle. You know, and, and I think this video is gonna help you look at things that potentially could be bad or could happen and foresee them and go do I wanna go down this road on my old motorcycle or is it just gonna exceed the value? And I don't, I don't love this thing. So if you love it and you wanna spend money on it, you know, pick the bike you wanna marry and for me, it's always goes back to 96 and later carbureted evil. That's, that's my zone because the wiring harness, the switch housings, the brakes, you know, stuff like that. That's my draw and that's the bike I'm really gonna lose my butt on. But if you inherited a bike like this or if you're like Dennis and you got a gift and your neighbor had this thing sitting in his garage forever and ever and, and the price is right. Yeah. Snap it up, you know. So, all right, I appreciate everybody tuning in and uh, you know, fix my hog, we got a ton of videos on maintenance. So check them out. Thanks again.
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