What Are The Top-Rated Camshaft Upgrades For Harley Davidson 103?

MX Dirt Rider is reader-supported. This post contains affiliate links. As an Amazon Associate I earn from qualifying purchases.

It is quite common to have a camshaft issue on your bike. This can damage the engine, which will eventually harm the performance of your motorcycle.

The most common issue that can be found is with the cam lobes, which can wear out quickly and eventually unable to open the valves. This way, there will be a reduction in the performance of your engine.

This is why you need to know the best cam upgrade for Harley 103 to prevent this problem from happening. In this article, I will break down everything you need to know about cam upgrades to pick the best suitable for your Harley bike.

Keep on reading as there will also be FAQs for better understanding.

7 Top Best Harley 103 Engine Cam Upgrades Reviews

IMAGE PRODUCT EDITOR’S RATING PRICE
TOP PICK & BEST BUDGET

Andrews 57H Chain Drive Cam Set

Andrews 57H Chain Drive Cam Set

9.7
CHECK ON AMAZON
S&S Cycle Complete Gear Drive 510G Camshaft Kit S&S Cycle Complete Gear Drive 510G Camshaft Kit

9.5
CHECK ON AMAZON
Vance & Hines 575 Twin Cam High Performance Camshaft Set Vance & Hines 575 Twin Cam High Performance Camshaft Set

9.1
CHECK ON AMAZON
Andrews TW21 Chain Driven Cams Andrews TW21 Chain Driven Cams

8.8
CHECK ON AMAZON
S&S Cycle 509G Gear Drive Touring Cam Kit S&S Cycle 509G Gear Drive Touring Cam Kit

8.6
CHECK ON AMAZON
Feuling 525 Twin Cam Chain Driven Cams Feuling 525 Twin Cam Chain Driven Cams

8.2
CHECK ON AMAZON
S&S Cycle 583 Chain Drive Camshaft Kit S&S Cycle 583 Chain Drive Camshaft Kit

8
CHECK ON AMAZON

1. Andrews 57H Chain Drive Cam Set

Here you have this Andrews 57H Chain Drive Cam Set for your Harley 103. This product can be best used for 2007 up to 2013 Harley models.

These are the splined chain drive camshafts, and the set includes the cams, one roller bearing, and one ball bearing. Keep in mind that these bearings are only included in 1999 up to 2006 models.

Make sure that your motorcycle is from these years as it will fit perfectly, or you would just be wasting your money. Another thing you should know is that this product is mainly manufactured to utilize by using stock for Harley Davidson hydraulic lifters. These cams can be installed on carbureted and on fuel injection models.

However, these can be specifically used for 103 as well 110 inches engines. If you match the description here, you are already on the right page. Keep on reading more.

Furthermore, keep in mind that when you plan on installing this by yourself, make sure to check the coil bind, valve to valve clearance, and the valve to piston clearance.

Another thing you should know about is that if you plan on installing heavy bikes, then it is best to bolt in low RPM Power galore.

Besides that, this product will perfectly fit Switchback 2012 – 2016, Road King 2007 – 2016, Road King custom 2007, as well as Road King Classic, starting from 2007 up to 2013, Electra Glide standard, classic, and ultra-classic and low, Tri-glide and so many other models of Harley Davidson motorcycles.

Just make sure to do more research and read the description of this product before buying to find out more.

There have been various complaints about this product, saying that it does not increase power and does not work well with heavier bikes.
PROS
  • Worth the money
  • Easy to install
  • It makes the motorcycle runs faster
  • Highly recommended by people
CONS
  • It does not increase the power
  • It does not work well with heavy bikes

Overall, this product is a great option for you as it will increase engine performance. It comes as a set, so you do not have to spend your money buying other parts separately. However, it is not suitable for heavy bikes, so make sure to research more.

2. S&S Cycle Complete Gear Drive 510G Camshaft Kit

This S&S Cycle Complete Gear Drive 510G Camshaft Kit can be easily converted into a gear drive from a twin cam.

The great thing about this product is that it is a kit that includes cams, gears, both internal and external ones, bearings, bolts, gaskets, and tough bearing plates, so you do not have to spend your money purchasing all these important components separately.

You will be happy to know that these are designed as a bolt-in cam for 103 inches and 88 inches engines.

This product has a compression ratio that is under 9.7: 1. These are best for stock heads that have not prevailed. On another note, the best thing about this product is that this camshaft will be able to increase the valve timing precision by omitting the clocking chain switch and the loose-equipped stock cam gears.

You can easily get this done by rehabilitating the stock cam drive sprockets and the chain with the help of a slight press fit of S & S gears.

In addition, once this process is done, you will be glad because there will be no possibility of your parts failing to perform or even destroying the performance of other parts of your Harley 103 engine.

Moreover, with the S & S Camshaft kit, you will also be able to rotate the direction of your rear cam. There will be extra operating approval in the middle of cam lobes.

You will be happy to know that you can only get high cam lifts by using this product, so you most certainly do not want to miss out as it will be able to show noticeable results.

Besides all that, this kit is formulated as a bolt into camshafts for 88 inches, 95 inches, and 96 inches that are with the compression below 9.7: 1. This product will also provide an excellent RPM range which will approximately be from 3000 up to 5500 RPMs.

In some cases, people received a package that had different parts that did not match the product’s description at all. And the company did not replace the product at all.
PROS
  • Great quality
  • The power curve is excellent
  • Easier to install on your own
  • Fits perfectly
CONS
  • Missing parts
  • Might deliver the wrong item
  • The company does not replace the wrong item

There you have it. This product might have some minor issues, but other than that, it is surely a great option if you plan on increasing the engine performance.

The great thing is that it comes with all the parts only if they deliver you the right product. Just make sure to order and contact the company directly.

3. Vance & Hines 575 Twin Cam High Performance Camshaft Set

Another great product is this Vance & Hines 575 Twin Cam High Performance Camshaft Set, a manufacturer Part no 35 – 4551.

An important piece of information that you should know about is that this product’s fitment is said to be 07 – 16 FLH/ FLT, 06 – 16 FXD, 07 – 16 FLST/ FCST. Make sure to check these fitment measurements first to match your motorcycle requirements.

You can do this by reading the instruction manual of this product or doing more research on it and reading the manufacturer manual of your motorcycle for a better understanding. Other than that, you will be happy to know that when you place an order, the company will make sure to ship it on the same day.

In addition to that, the product is transported from various warehouses so they can assure the delivery of the product promptly.

Furthermore, the great thing about this product is that the company Vance & Hines wants to make sure that the products people are buying from them are made with high-quality materials and unique products that differentiate from their rivals.

Moreover, the bolt in camshafts has an estimated .575 inches lift and 240 degrees of duration, which includes both the intake and the exhaust. Other than that, they have a silent ramp profile that will be able to exclude valve train noise as you ride on your motorcycle.

And lastly, this product is available and works wonderfully with stock pushrods and lifters, so you do not have to buy other components for such parts. This product is a must-have as you will be able to notice a change in the performance as you ride every time.

This product does not work well with heavy bikes since many people tried using it, and it did not provide the optimum performance that they expected.
PROS
  • Easy to install
  • This product can adjust the pushrods
  • It can also fit well in a home
  • It comes as a kit
CONS
  • Not suitable for heavy bikes
  • It might not make a big difference in performance

Overall, a great choice for you as the company assures you to provide a product that will make the ride of motorcyclists even more enjoyable and comfortable.

However, this product is not suitable for heavy bikes, so just make sure you check the description whether it matches the requirements of your bike or not.

4. Andrews TW21 Chain Driven Cams

Coming to this Andrews TW21 Chain Driven Cams, this product has splined chain drive camshafts. Since this product also comes with all the important equipment required for installation.

The kit includes cams, one roller bearing, and one ball bearing. Keep in mind that all the included bearings can only work for 1999 up to 2006 Harley motorcycle models.

Just make sure to check these requirements before you purchase it because it does not match the description, then you will end up wasting your money since it will not fit your motorcycle.

You can easily purchase the roller bearing separately from an auto parts store since these bearings are not included in the kit. You need to note that this product is mainly manufactured for usage with the stock for Harley Davidson motorcycle hydraulic lifters.

This product has been designed to ensure you have high-quality performance and ensure that you can 100% rely on it. Also, you can effortlessly install this product on the carburetor and the fuel injection models of Harley 103.

Besides that, the cam bolt has more torque at low and central RPM range, which is approximately 1700 up to 5200 RPMs. You need to note that this product is quite similar to the EV 23 for heavy bikes.

Another thing you should know about is that this product is not suitable for 2006 FXD, so if you own this model, you should look for another camshaft that will fit perfectly.

Moreover, this product is made in the USA. Various people and professionals highly recommend it since it comes as a set, so you do not have to spend your money buying all the important parts separately.

Make sure to use this product with stock springs for excellent results. The valve list is about .498 inches, and the lift at the TDC is about .121 inches. Lastly, before installing this product, check the coil bind and all clearances.

Various people said that the description of this product is not exactly true. Some even said that there are missing parts as well. Make sure to buy directly from the manufacturer.
PROS
  • Better power band
  • Great rpm range
  • Increased performance
  • Easy to install
CONS
  • Misleading description
  • Missing parts
  • Defective product

This is a great product for you to invest in since it comes as a set, so you do not have to buy them separately. However, you might have to spend on rolling bearings and make sure that you buy from a promising place since some people face issues with the product at various times.

5. S&S Cycle 509G Gear Drive Touring Cam Kit

The fifth product in this list is this S&S Cycle 509G Gear Drive Touring Cam Kit, which is designed as a bolt-in with a high torque Cam for 1999 up to 2006 Harley motorcycle models.

This product is most certainly a great choice for you if you want to increase the power and performance of your engine so you can have a smooth ride every time you ride.

This product has a 180 Psi cranking compression, which means you will not need to release compression. You need to know that this product is best for 22 Cid engines with a stock compression ratio idle of 4500 rpm.

Besides all that, the intake opening of this product is about 18 degrees, and the intake closing of this product is also 18 degrees.

The exhaust opening is about 46 degrees, whereas the exhaust closing is about 11 degrees. The intake duration of this product is approximately 216 degrees, and the exhaust duration is about 237 degrees.

Moreover, the valve lift of this camshaft is .509 inches, and the intake lift at TDC is about .174 inches, whereas the exhaust loft at TDC is about .140 inches. These measurements will help you better understand so you can match it with your motorcycle.

This product might be able to increase the power of your engine, but in various cases, it might end up lowering the fuel economy or the mpg of your motorcycle.
PROS
  • Complete package as it comes with all the required parts
  • Increase the power of the engine
  • Easy to install
  • It makes the sound better as well
CONS
  • Reduction in fuel economy
  • Decrease range

Overall, this product is a great choice since it offers a lot. Still, most importantly, it will be able to increase the power of your engine, which will eventually give you a smooth and high mileage ride on your motorcycle every time. However, it might increase the power but reduce the fuel economy, which is not good for the engine at all.

6. Feuling 525 Twin Cam Chain Driven Cams

If you are looking for camshafts that will be able to boost the torque bandwidth and improve the fuel economy of your motorcycle, then the Feuling 525 Twin Cam Chain Driven Cams is the best option for you since it is formulated to do just that.

The great thing about this product is that it has a bolt-in camshaft upgrade which is incredible for stock engines. You need to know that this product can produce powerful low and mid-range power with the help of straight horsepower and a torque curve so you can have better performance while you ride.

Furthermore, you will be glad to know that this product can easily be utilized for and with the factory valve springs, the pushrods, and the lifters.

Besides all that, the unique thing about this product is that it will enable you to have an enjoyable experience since it will increase your motorcycle’s throttle response and make it start quickly without stalling any other issues.

This product has an RPM range of approximately from 1750 up to 5800 RPMs, so you can most certainly go at great speed.

This might not fit some types of Harley motorcycle models. Make sure to read the description of this product and do more research before buying it.
PROS
  • High quality
  • Fits perfectly
  • Easy to install
  • It makes the motorcycle run a lot better
CONS
  • Might not fit some types of motorcycles of Harley Davidson
  • It does not come as a full set

Overall, this is a great product to increase the fuel economy as some other products cannot do. You will most certainly see excellent results while using this product, so you should try it and see it yourself. However, do more research on this product as it is not suitable for some Harley models.

7. S&S Cycle 583 Chain Drive Camshaft Kit

Finally I am almost there with the article and the last product on this list is this S&S Cycle 583 Chain Drive Camshaft Kit that is a co miserable choice for your motorcycle.

This product works wonders for Softail and Dyna, so if your bike falls in this category, then it is a must-have product. You will be happy to know that this product will be able to deliver powerful low-end torque and increase the horsepower of your motorcycle for sure.

This means that you do not want to miss out on this product at all since it will be able to give you a more smooth and satisfying ride every time. Furthermore, this product has the strongest RPM range, about 1500 up to 5000 RPMs.

Besides that, keep in mind that if you have 1999 up to 2004 Harley motorcycle models, you must use high lift springs for better usage. Moreover, the intake opening of this product is about 8 degrees.

This product has a warning of California Proposition 65, a warning for California consumers, which means that this is a cancer and reproductive harm warning.
PROS
  • Advertised well
  • It makes the motorcycle runs fast
  • Great rpm range
  • Easy to install
CONS
  • Warning for cancer and reproductive harm
  • Not designed for all Harley Davidson models

To conclude, this product is highly recommended since it can increase the low-end torque and the horsepower of your motorcycle. You can have an amazing experience by using this product, so it is worth buying.

However, this product might not be best to use in California because of the warning that is given, and it also does not fit all the models, so it is best to do more research before buying it as you do not want to end up with a product that does not fit well.

FAQs

What Does A Cam Do For A Harley Davidson?

You can increase the horsepower and torque of your Harley Davidson by upgrading the cam. This can be done by basically changing the valve timing.

This will make sure to let the exhaust out of the system and let the fuel and the air inside at particular times. When this happens, you will increase the torque in various ranges that can be both low and high.

How Do I Measure A Harley Davidson Cam Lift?

You can get the accurate measuring results of the cam lift of your Harley Davidson by simply calculating the diameter of the cam’s base circle and then deducting that with the biggest diameter that you find on the cam and the lobe lift. This way, you will also get the measurements of the lobe lift.

What Is Considered A High-Duration Camshaft?

A 280-degree duration is considered a high duration for a camshaft. This can hold the valves open for a longer time as well.

This way, you will also get more air and fuel inside the engine, allowing more to get out through the exhaust system. This will most certainly increase the power.

How Do I Know What Camshaft To Use For Harley?

To decide on which camshaft you need for your Harley 103 mainly depends on what you are planning to do with it.

It mainly depends on both things, such as whether you want to use it for street riding or if you plan on increasing the horsepower as well as the torque. Make sure to read the features of the products to find the best one for you.

Is Cam Upgrade Important And Worth It?

Yes, a cam upgrade is important for your motorcycle. Make sure you buy from a reliable source and spend your money on a well-known brand to get the best performance. If you want to boost the engine power, it is best to purchase a camshaft.

What Should I Look Into Before Buying Cams?

You need to look into various things before you buy camshafts. The main and most important aspect is the bike model, engine combination, and the correct cams to fit your motorcycle.

You also want to look into the price so you can check from the cheapest to the most expensive one and the features and how it will perform on this product, such as whether it will increase the horsepower, the engine power, and so on.

When Buying Camshafts, Does The Brand Matter?

Well, not exactly. Various brands provide the same features and assure you to have a great performing engine. Some brands might have high-reliability rates since they have many customers who trust and are satisfied.

The brand does not matter since you want to mainly see how well a product will fit on your bike and how it will perform.

Conclusion

Finally I am done with the article and I hope with my article’s help, you can now decide the best cam upgrade for Harley 103.

Although all of these are great products, I would highly recommend the Andrews 57H Chain Drive Cam Set since many users trust it and professionals recommend using it.

It has a lot to offer since it comes as a set, so you have everything you need in it, and it can increase the power of your engine, which will make it easier for you to ride on your motorcycle.

Besides that, just make sure to buy from a reliable source or buy it in person since there have been cases of people receiving a bad quality product and missing parts.