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107ci to 128ci Upgrade
107ci to 128ci Upgrade
107ci to 128ci kit from Harley-davidson
Don't know if this is a place to ask this, admin may move it.
Has anyone installed this kit on their 22 Street Glide and how difficult is it, pros & cons?
Don't know if this is a place to ask this, admin may move it.
Has anyone installed this kit on their 22 Street Glide and how difficult is it, pros & cons?
Club Member
Joined: Apr 2016
Posts: 11,500
Likes: 8,336
From: Inland NW
Is that accurate? In the description they have 114 to 128. Is this really for a 107?
Do yourself a favor, get a 124 kit (if you do indeed have a 107) from Fuel Moto with a real cam, and a real programming device. Life is good.
4.250 x 4.375 stroke = 124ci
4.250 x 4.500 stroke = 128ci
Do yourself a favor, get a 124 kit (if you do indeed have a 107) from Fuel Moto with a real cam, and a real programming device. Life is good.
4.250 x 4.375 stroke = 124ci
4.250 x 4.500 stroke = 128ci
Last edited by NorthWestern; Nov 16, 2024 at 10:36 PM.
Grand HDF Member
Joined: Jul 2007
Posts: 3,730
Likes: 8,484
From: Bates County MO
Yes, it's HD's 4.31" bore BB kit for a 107, with the 517 cam and ported heads (and another stock cat head pipe).
Kit works OK, better with a different cam & tuner (I like the TTS250 for these). You can get better results for less $ if you go aftermarket.
If you've never tackled an engine build before, there are a lot of things that can go sideways, maybe spend a few hours watching utube vids.
Kit works OK, better with a different cam & tuner (I like the TTS250 for these). You can get better results for less $ if you go aftermarket.
If you've never tackled an engine build before, there are a lot of things that can go sideways, maybe spend a few hours watching utube vids.
Is that accurate? In the description they have 114 to 128. Is this really for a 107?
Do yourself a favor, get a 124 kit (if you do indeed have a 107) from Fuel Moto with a real cam, and a real programming device. Life is good.
4.250 x 4.375 stroke = 124ci
4.250 x 4.500 stroke = 128ci
Do yourself a favor, get a 124 kit (if you do indeed have a 107) from Fuel Moto with a real cam, and a real programming device. Life is good.
4.250 x 4.375 stroke = 124ci
4.250 x 4.500 stroke = 128ci
DetailsFits '17-later Touring models equipped with air/Oil-Cooled Milwaukee-Eight 107CI engine. Does not fit Trike models. '17-'19 models require separate purchase of High-Capacity Oil Pump P/N 62400247. '17-'18 Screamin' Eagle High-Capacity Clutch Plate Kit P/N 37000258. All models require ECM recalibration with the Pro Street Tuner or dealership installed Screamin Eagle calibration for proper installation. Does not fit California models.
Road Captain
Joined: Aug 2008
Posts: 635
Likes: 388
From: Philadelphia Northeast
Actually nothing really difficult in this installation whether it is a Harley Stage IV or FuelMoto or Zippers or anything else. You just put your bike on a lift or stand, remove everything you need and install the new parts. There are some regular and special tools (neither expensive nor unobtainable) needed. And some wrenching skills too but also nothing really supernatural.
With Harley Stage IV kit you will receive a complex and reliable solution (you will only need to add the mufflers too if you still have stock) but might not have a top result for such investment on an engine upgrade. Should you decide with Fuel Moto kit you can select their 129" for 107 engines and consult with them for the proper select of the cam, headwork, exhaust and every other parts to upgrade. This is more interesting way as you may receive the engine which will be looking pretty stock unless the deeper look done. And the result can be way much better.
With Harley Stage IV kit you will receive a complex and reliable solution (you will only need to add the mufflers too if you still have stock) but might not have a top result for such investment on an engine upgrade. Should you decide with Fuel Moto kit you can select their 129" for 107 engines and consult with them for the proper select of the cam, headwork, exhaust and every other parts to upgrade. This is more interesting way as you may receive the engine which will be looking pretty stock unless the deeper look done. And the result can be way much better.
Supporter
Joined: Mar 2020
Posts: 1,007
Likes: 598
From: Northeast Louisiana
100% worth it (SE Stage IV 128), and even with the warranted (lifetime in many cases) HD tune, it is plenty enough power without worry of re-cam. I have close to 16k hard ridden miles on mine and enjoy it plenty (4th rear tire) 0 burnouts and / or spinning taking off.
ONE BIG PROBLEM TRACTION !! (yes the sooo weak SE, lol)
The 180mm Dunflop will not hold 2nd gear, so be ready for sideways. The softer 200mm Shinko fixes that with the bonus of fixing the rear suspension as absolutely 100% better ride.
Got 3k miles on Dunflop and 6k on the Shinko tires.
Wonder which on stops MUCH better as well....
Professional 9 and 10 sec baggers run these tires, as well.
2nd problem was HEAT"2 tank lift (I did front only) fixed that, in this so pleasant Louisiana weather.
Do it and never look back!
Do your research, as there is a reason HD would not let you chose the torque cam on the Stage IV M8 with a warranty as things tend to break, as in always a weak link somewhere (belt/tranny) and then the rabbit hole never ends.
Have broken more than my share of belts on built 80" Evos (even the Anaconda). 86 FXR that can still spank my heavy 128" RK, lol. As well as shelled 3rd gear on a Stage 2 M8 107" that was a torque monster down low. (Lot's of bad 3rd gears for sure)
Ride Safe AND reliable!
ONE BIG PROBLEM TRACTION !! (yes the sooo weak SE, lol)
The 180mm Dunflop will not hold 2nd gear, so be ready for sideways. The softer 200mm Shinko fixes that with the bonus of fixing the rear suspension as absolutely 100% better ride.
Got 3k miles on Dunflop and 6k on the Shinko tires.
Wonder which on stops MUCH better as well....
Professional 9 and 10 sec baggers run these tires, as well.
2nd problem was HEAT"2 tank lift (I did front only) fixed that, in this so pleasant Louisiana weather.
Do it and never look back!
Do your research, as there is a reason HD would not let you chose the torque cam on the Stage IV M8 with a warranty as things tend to break, as in always a weak link somewhere (belt/tranny) and then the rabbit hole never ends.
Have broken more than my share of belts on built 80" Evos (even the Anaconda). 86 FXR that can still spank my heavy 128" RK, lol. As well as shelled 3rd gear on a Stage 2 M8 107" that was a torque monster down low. (Lot's of bad 3rd gears for sure)
Ride Safe AND reliable!
Last edited by Bayou FLHR-M8-128"; Nov 23, 2024 at 04:09 AM.
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