Harley Davidson 103 Engine Upgrades

A Harley Stage 1 upgrade involves upgrading your bikes air cleaner slip-on exhaust and fuel tuning to allow your motor to breathe more freely.

Harley davidson 103 engine upgrades. Stage 4 and 5 upgrades vary on capacity stage 4 being 103ci and the new steel liners that Screamin Eagle offer in the stage 5 allow a 96103ci twin cam to step up to 110ci without the need to bore cases. Harley Fast is big business. After stage 3 upgrade a 103 cc Harley engine will get 24 off more torques and an incredible amount of 34 of horsepower.

For those that do though all four stages can be done in conjunction with one another to build the ultimate Harley V-Twin. Well we took some time and did in fact put our heads together and under much scrutiny of our editors we have listed a countdown to performance nirvana and in what order in which to do so. So if you are thinking of upgrading or getting a bike with this type of engine this year its still worthy of its price.

This is why we provide the books compilations in this website. Harley doesnt release horsepower numbers. Just like with many cars you can get kits to upgrade the internals of your Harley Davidson motor for better performance.

Stage 2 Usually consists of added cams to increase intake and exhaust flow. The power increase makes the ride a bit more exciting and a lumpy idle gives your bike a nice tough note. FAQ How reliable is the Harley 103 Engine.

A 4125 bore x 400 stroke with about 105 static a decent set of cams with about 600 lift good heads and the right pipe and you got yourself a torquey dependable motor that is a hoot to ride. I wanted to make a video to compare both the 103CI Harley Davidson Twin Cam motor in the 2015 Road Glide against the new 107CI Milwaukee 8 motor in the 2018. Overall the Harley Davidson 103 engine is powerful and worthy.

Answer 1 of 6. Thats a 96 or 103 Harley putting out 110-plus hp with a torque number to match or with a few quick parts substitutions bumping those numbers up into the 125 ranges torque and horsepower. Stage 1 Exhaust and Air Cleaner Let it breathe.