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Discussion Starter #1 (Edited)
Our big bore kits have just got bigger. We are now offering a FM 124 kit for 107" M8 engines as well as a FM 128 kit for 114" & 117" engines.

Our Fuel Moto 124" and 128" M8 bore kits are true bolt on combinations (no case boring required) and are sold as complete kits with the absolute highest quality components, all of which have been extensively tested in house both on the dynamometer as well as in real world conditions to deliver top level performance. The 124" kit works on 2017-2019 H-D Milwaukee-Eight 107" engines (air cooled & twin cooled) and the 128" kit works on 2017-2019 114 & 117 engines. When combined with the appropriate performance modifications offers output in excess of 140+ horsepower.

These kits are complete with pistons/cylinders, cam, pushrods, lifters, & all necessary gaskets. MSRP is $1699.00
For more info visit https://www.fuelmotousa.com/p-33976



 

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Discussion Starter #2
2018 CVO Road Glide: Fuel Moto M8 128 big bore kit, FM Level A CNC heads, Wood WM8-408 cam, SE ported 64mm TB, AIM SDR clutch, Jackpot XXX head pipe & Hi Roller mufflers, and tuned it with Dynojet Power Vision.


 

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So, why does the 124 actually make slightly higher numbers than the 128?

This coming from someone who knows jack s*&t about motors and am looking to at least understand why. Can it be contributed just to the slight variation in weather, compression of the motor, stroke? Are there any variations in the regular motor vs. the CVO motors that would lend itself to these results?
 

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Discussion Starter #4
So, why does the 124 actually make slightly higher numbers than the 128?

This coming from someone who knows jack s*&t about motors and am looking to at least understand why. Can it be contributed just to the slight variation in weather, compression of the motor, stroke? Are there any variations in the regular motor vs. the CVO motors that would lend itself to these results?
While the overall build's are nearly identical (the only difference is stroke) there are however relative differences between them; the biggest being they are different bikes on different days, in different conditions. Other considerations are the specific fuel in the tank, they each had different style air cleaners, and the tire/wheel size is different between both bikes. The CVO also had quite a few less miles on the bike.
 

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Nice numbers and graphs for sure. My questions are how is fuel pump being addressed, and what the bottom end? are there any issues with the crank? I feel like you would have some type of issues with the bottom end and that much power. No sumping?
 

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Discussion Starter #6
Nice numbers and graphs for sure. My questions are how is fuel pump being addressed, and what the bottom end? are there any issues with the crank? I feel like you would have some type of issues with the bottom end and that much power. No sumping?
We've built over 100 M8 engines over 135Hp with zero lower end issues. Pump fuel friendly, and no sumping.
 

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Discussion Starter #7
2019 Street Glide, FM M8 124" big bore kit, FM Level A CNC heads, Wood WM8-408 cam, SE 64mm TB with Ward manifold, AIM SDR clutch, Jackpot XXX head pipe & Outlaw mufflers, and we tuned it with Dynojet Power Vision

 

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Discussion Starter #9
Isn’t there, anything bigger for the 2018 M8 107?
Not without boring the engine cases or changing the crankshaft to a longer stroke.
 

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Can you / Do you offer any kind of preloaded tuner for the 124" package? Something that would be close and at least rideable until you could get the bike chassis dyno'd?
 

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Beautiful Curves!! Great Numbers!!

What is the CCP??
 

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Do you have know of shops in the Dallas/Ft. Worth area that can install?
 

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Have you done any builds on an M8 with JackPot XXX and Rinehart 4” 124 and following cams:
WM8-77X
WM8-9960
WM8-68
WM8-6860

Using BM-W4 springs or which ones?

What’s the best for overall hp/tq in the above 1500rpm through band or 2000 through band and making 160hp+ /150tq+ or close to it and what else was used?

and what’s heads and what’s the HP/TQ got can you post results?
 

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Discussion Starter #14
Have you done any builds on an M8 with JackPot XXX and Rinehart 4” 124 and following cams:
WM8-77X
WM8-9960
WM8-68
WM8-6860

Using BM-W4 springs or which ones?

What’s the best for overall hp/tq in the above 1500rpm through band or 2000 through band and making 160hp+ /150tq+ or close to it and what else was used?

and what’s heads and what’s the HP/TQ got can you post results?
These builds do not make 160+Hp, they are realistically in the 140-150Hp range depending on the combination. For best information and recommendations you can contact us at 920-423-3309
 

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Discussion Starter #15
2020 Road Glide Special: FM 128 big bore kit 10.75:1 comp, Wood WM8-22X cam (retarded 4 degrees), stock heads & valve springs, SE 64mm TB w/Ward manifold, FM AC/DC air cleaner, AIM SDR clutch, Jackpot 2/1/2 head pipe & Hi Roller mufflers.[/color]

 
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