I've been reading as much as I can here to educate myself on HD upgrade kits and just today read the following: $1995 - 120" Fuel Moto Big Bore M8 107 kit. They show impressive dyno numbers with this upgrade.

Obviously one loses their new bike warranty installing this kit but is it not fair to expect more from them regarding an M8 114 upgrade kit(s) which will produce even more HP/TQ?

Is the consensus here that Fuel Moto's kits are better higher performing than HD's SE kits? The only drawback is that HD will not warrantize any upgrade not SE parts nor installed by them?

 

You will not get anywhere near the numbers with harley parts all they have is the epa stuff.

 

If you are gonna pay money to mod the motor, I wouldn't worry about the warranty. I would worry about quality parts and a quality instal and break in. FM has probably the most experience with the M8 to date, I would go that route if I were gonna pump up the motor.

They are definitely better than the SE stuff.

 

FM is definitely one if not the best in what you are talking about. I how I wished they were in my back yard.

 

$1995- is going to be the cost of the components. Your mileage may vary after installation.