but poor ol Krash has a twin cam. Shortly after that nothing but problems with the “twinkie”. That fucker ain’t coming out of there straight either. EVO Harley Replacement Engine 96" Want to replace your worn out Harley-Davidson Evolution engine without breaking the bank? If you ride an Evo, check out what makes your ride special. The next photo will show exactly what they’re doing. This engine came as a replacement for the Shovelhead engine till the year 2000. I’m hoping that this article will be very informative. Dyna and Softail models will keep the Twin Cam motor. For now I’m simply gonna reach in there and pull that cam out…. There are many other differences, but these are the easiest to spot for me. 2.) INA bearings occasionally fail, so wise engine builders replace the INA(s) with a B-148 Torrington bearing. (110 mm) Rake (steering head) 29.9° Fork Angle 28.9° Trail 5.84 in. Easy to work on, run cooler, and make dang near as much HP as the 88 does stock. In fact, in the last century there was originally over 130 American motorcycle manufactures; all but one eventually buckled under the pressure. 19 Shovelhead. Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window), Click to share on Pinterest (Opens in new window), Twin Cam advantages. Here’s a look at the technical elements and developments that allowed the 88-cu.-in. In time I established a way of life almost completely devoid of these pressures. Have a 1998 FLSTC (Heritage Softail Classic) with the EVO engine, 32K with an S&S upgrade cam and rev-tech 6 sp. … Well lets take a look at the twin cam in the next photo and see how that worked out…, 14 There it is. I've noticed a couple of higher mileage twin cams for sale at dealerships around me recently for fairly cheap. Also, the angled pushrod issue isnt so much a limiter of rpms, but its hard on the rockers. Stock valve springs in 2005-up … The noise you have heard about is from the 6-speed transmission. It no longer works like that. When that cam spins the lobe’s gonna come around and push up on that wheel. Evo Twin Cam Displacement 82 cu in (1,340 cc) 88 cu in (1,450 cc), 96 cu in (1,584 cc), 103 cu in (1,690 cc), 110 cu. The twin cam has two piece rocker box (on top of cylinder) covers, evo has 3 piece covers. S&S 80 Inch (1340CC) 3 1/2 … Great article Scotty! If I started the engine you’d see those things flying up and down pretty damn quickly. Right: All Evo and Twin Cam engines have shipped with INA bearing(s) in the gearcase for left-side camshaft support. Not to mention the Integrale’s looks: beefily broad, broodingly hard … Flywheels are actually lighter (granting quicker revving, although possibly at the cost of a little torque) while crank bearings remain the same. The next photo will show exactly what they’re doing. Problem was people wanted more power. I keep the older ones cause I can and do work on them. Left: The 1999 Twin Cam engines included two ball bearings in the cam support plate for outboard camshaft support. Looking at the differences between the new Milwaukee 8 Engine from Harley Davidson with the old Twin Cam, you begin to see just where the improvements where HD focused in on. Harley Evo vs Twin Cams: The Sweet Years Posted on 22. What’s up with that? Ok what do you ride a Evo or Twin Cam (sorry to all the other Harley owners but we all own great bikes) what do you prefer and why but also please don't run each others bikes down we all know they have there faults. The engine’s job is to turn a shaft that sticks out either side of it. See those four chrome tubes on the side of that evo engine? Then, in the mid 80s, HD countered with the evolution engine (so named because it was supposed to have evolved to compete with the new era of motorcycles). 20 Years ago Harley-Davidson saved their corporate hide with the Evolution engine. Good article, but take exception to the comment that most new riders would prefer the added power of the TC. This engine is rumored to come in 107” and use four valves per head. I’ll show it to you in the next photo. It’s real old stuff. The twin-cam 88 is even less user-servicable. A frank discussion of the inherent flaws with the Harley Twin Cam engine, produced since 1999 to the present. Failure can occur and take oil pump out with it. Now let’s get a little deeper into what’s pushing them up from the below…. They also used, and I can' remember the technical name of the chain, an older chain design. Then, in the early 90s, S&S came out with a big 96 inch evo clone (before that S&S had only made parts. This noise increases during warm-up (knocking like a diesel engine) and a little subsides when the engine is warm enough. The Harley-Davidson Evo was not only more powerful, but it ran cooler and smoother than the Shovelhead. To bad the desire to take of our own bikes and ride a lot for little money keeps us from New bike performance. The noise you have heard about is from the 6-speed transmission. So you see, the twin cams have nothing to do with performance enhancement. EVO downfalls: 1.) For most simply wouldn’t be happy with performance on the older bikes. It’s pretty important. I’ll try to show you in the next photo…. Lv 4. That little gear on the bottom is the pinion shaft that comes off the engine. It took a number of years past the Evo's birthdate before the aftermarket could gear up. Look close at that far right push-rod tube. (I know need a baker but had it when I got the bike and had no issues for 25K. Guess they decided to try putting the tubes at an angel and see how it worked out. To answer that I’ll need to tell a little piece of HD, or motorcycle in generally, history: As with all motorcycle manufactures, Harley Davidson has always been in fierce competition with, well, their competitors. 2012 Harley-Davidson Twin Cam 103 V-Twin Engine – USA Specifications/Technical Details US MSRP Price: See Dealer for pricing. EVO Harley Replacement Engine 96" Want to replace your worn out Harley-Davidson Evolution engine without breaking the bank? I'm sure there is already a watercooled cruiser sitting in the R&D lab at HD. I had at one time a 91 fatboy evo motor and it ran always no problem then in vegas one day a old lady ran over it and it was totaled by insurance comp so i got a 2002 dyna low rider its been ok but should have got another evo. The engine can have different bore and strokes as well as horsepower and torque ratings depending on what … 4B11 Engine Problems and Reliability. However, you still need to know and be aware of what exactly are you buying so there would be no surprise expenses once you start driving the motorcycle. All but the twin cam. Note: I have other photos of the inside of these lifter blocks that shows them being pretty badly pitted up inside. Also available in the Sportster model beginning in 1986, it was made in the 1,100 cc (67 cu in) displacement until 1988 and is still made in the 883 cc (53.9 cu in) and 1,200 cc … Cams Single, with 4 lobes. Failure can occur and take oil pump out with it. The 1.5 TSI is the first engine of the renewed EA211 evo family introduced in 2016. Makes me miss the FXR, I've had a lot of bikes of all types in my 50 plus years of riding, from jap bikes to my 64 Panhead to my 1997 EGC  EVO with 93,000 miles on it an never apart and ready to ride this season too when the Doc says I can, that EVO motor is one of the BEST Harley ever made as far as I feel, Love my Evo.....   64. A very good bang for the buck upgrade for those who want passing power without breaking the bank. On the contrary, the It is possible, however, to mount a regular Twin Cam motor to a pre-2000 Softail (or any chassis that accepts an Evolution engine) through third-party adapters. 6 Okay. Early 1984-1989 lifters sucked (A-series). We do have a solution for your Harley Davidson twin cam engine problems. This upgrade makes smooth, even torque and … Cactus jack has really no idea what he is talking about. But wait! Here’s the catch, that little bottom gear coming off the engine (called a pinion shaft) has to be turning completely straight. Sort Default; Sort A-Z; Price Low-High; Price High-Low; Showing 79 products in this section. Modern longevity coupled with extreme simplicity; a very big plus in my book. Lemmy at Revzilla broke down all the improvements on this here. In late 2000, the factory replaced the rear ball bearing with a roller bearing (right), because the ball bearing was prone to failure. The twin cam … I have read many of your articles. For this engine they’ve returned to the single cam design, except again this cam will be driven by a bicycle chain instead of gears, and I have to assume this is again to help counter the occasional untrue crank. One of my main concerns for the evo was: would it carry on this tradition? The Twin Cam runs super hot,and its cam chain tensioner is a nightmare to maintain. I really enjoy life. That’s the part that gave these engines all the problems between the years of 1999 and 2006. That thing sticking out the bottom is a lifter and it moves up and down inside a tunnel in that lifter block to push up on the push-rod above it. What’s up with that? And although you non-gear-head guys may not be interested in tech stuff, if you bear with me for a minute you will also see, easily and obviously, what the real advantages to the new engine’s are, and are not. How do you like that? This pump is more efficient, maintains a higher pressure and larger volume. Baggers Only: At least, for now. engine the increase power and reliability. The Twin cam is basically the same motor except it has more cubic inches and less moving parts. Anonymous. Like the 4G63T, the block is equipped with oil jets for cooling forged aluminum pistons made by Mahle. Not that the Evo didn't have its own problems, but overall it's a much better … Same thing. Push-rod systems will not work at high RPM, especially if they’re not straight up and down, which is why the Japs use overhead cams so they can rev their engines up to 10.000 RPM. The twin camshaft was also released as a Twin Cam 88B which was quite a bit bigger at 96 cubic inches. Next it was the Japanese who introduced reliability and longevity to modern motorcycle in the late 60s and especially the 70s. 17 What they did was; instead of moving the lifter blocks down below, they simply moved the holes up top out until each was directly over the it’s proper lifter block below, and wallah! And so the twin cam was born. Topics Why is Evo Sportster better than Evo big twin? ORCA Engines: 113/132 and 139 EVO and 126/139 Twin Cam. So Evo engines have higher pushrod angles because of having one cam. All but the twin cam. cheers Now I just ride with confidence of overpriced, qualified mechanics and extended warrenty got for free paying cash for the Heritage. Inside each one is a round metal bar, or push-rod, that is pushed up from below to move something in the top. But how many folks repair their own bikes these days anyway? The Twin Cam runs super hot,and its cam chain tensioner is a nightmare to maintain. 0 0. And it still powers modern Sportsters. 17 What they did was; instead of moving the lifter blocks down below, they simply moved the holes up top out until each was directly over the it’s proper lifter block below, and wallah! First off the compression ratio was raised by one entire point, while cylinder to head surfaces were increased to lessen the possibility of blown head gaskets associated with higher compression. These replacement engines fit 1984-1999 big twin chassis which came with …