Everything 2018 FatBoy thread
The internal wires for my 4inch fat riser setup with OE bars is pulled tight and I don't like that so I want to get these CustomDynamics extensions
https://www.customdynamics.com/handl...avidson-models
But it doesn't seem to have a throttle by wire extension.
What size bar did made you extend the TBW cable?
Also I'm looking to build a custom modular bar setup. and am curious how tall you can go with the stock brake line once you remove it from the retainer clip on the back of the nacelle. I don't like tall bars to begin with, so I'm trying to get my modular parts to fit within the same height as the Stock OE Bars on the Curved Fat Risers.
I want to go back to the stock monoblocks because they look cooler.
I'm having a hard time figuring out measurements though.
Stock Bars according to Thunderbike HD's website are 7.5inch rise, and the Curved Fat Risers are 4inch. I don't think Thunderbike's specs are correct though.
All these measurements are really confusing trying to figure out.
What you need is a long ball-ended 1/4" imperial hex key, that you can cut/grind the L part off. Or, a long 1/4" drive socketed 1/4" hex key.
Ideally the 1/4" hex needs to be 220mm to do both sides of the flanges without needing to remove cooling hoses etc. Or, at if it's at least 55mm or so it will get to the bolts without the socket on the end rubbing against engine bits and making the angle on the bolt head worse, from that you can make up the rest of the length with your 1/4" socket set extension bars, just make sure your extension bars are 1/4" not 3/8 or 1/2" (pic of mine attached)
The other awkward bit was (without stripping down the engine a bit) was wiggling the manifold out - I disconnected it all, then had to take the whole fuel rail and injectors off to be able to wiggle it out the right hand side of the bike.
PS I did get new intake flange seals as the book recommends, just for peace of mind.
Hope this helps
Last edited by IBE; Jan 26, 2024 at 11:29 PM.
I based it on my swingarm bag and wanted the same look and materials. The only downside now is myself, the recovery from my back
surgery is very slow and I am not allowed to ride a bike for at least another 2 months.
The swingarm bag..
I based it on my swingarm bag and wanted the same look and materials. The only downside now is myself, the recovery from my back
surgery is very slow and I am not allowed to ride a bike for at least another 2 months.
The swingarm bag..
Bike looks good , very nice seat and swing arm bag. Where did you get that swing arm bag and what type of motorcycle dolly is that ? The one I bought had to return , the 200 rear tire on my Fatboy didn’t fit properly in the dolly and yours is a 240 .
Last edited by sire86; Feb 3, 2024 at 12:58 PM.
Thanks !
Both seat and bag are custom made,
The dolly comes from Motea in Germany, they are very good quallity and I have 7 of them in use but I altered the width on the rear by 2 of them to accept the 260 tire (stock was 240) on both my Breakout and Fat Boy.
The Best of Harley-Davidson for Lifelong Riders
I've trawled through some posts but can't find the info.
Can you remind how you did it please?
Do you have Baffles in them?
If you have the Baffles in the pipes currently, you need to pull them out and check them. If they are the baffles I think they might be, they will have a Torque Disc at the front end of them.
It should look like this:
If your Baffles have this plate at the end you need to cut out the plate. You can also get some muffler wrap and wrap that forward section to help deaden the sound even more.
Then you need to measure the internal diameter of the baffle, and determine the size of TTI that will fit. It seems like it should be 118W. DK has a chart here: https://www.dkcustomproducts.com/cho...ue-inserts.htm
If you don't have baffles like that in your exhaust atm, you will need to check to see what kinds you have.
Placement of the TTI matters on the kind of baffle exit, if the baffle is the same diameter the entire way through and does not flare/bell out at the end then you just measure 1inch from the end of the pipe, measuring from the farthest inward part of the slash cut.
Then mark out where you want to Drill based on how far back from the stud the trailing edge of the TTI disc is. You will want that trailing edge of the disc to be even with the 1inch back marker, or close too it.
If your Baffles have Bell/Flared ends, you will want to measure how far back the stud is from the trailing edge of the Disc, and drill the hole for the stud so that when it's placed in the baffle the trailing edge is even with the start of the flare, or just infront of it by 1~2mm.
The purpose is that you are trying to create a drop in density right after the TTI is creating low pressure velocity increase. The double drop in pressure will create more scavenging, and prevent more reversion.
The Exhaust squeezes past the TTI and the velocity increases, as the pressure decreases. When it dumps into the bell flare, it has an area to expand into preventing an increase in density, and the exhaust pressure will push against the TTI and flare and this will reduce the exhaust pulse's ability to reverse direction and pollute the new cylinder charge.
Basically you place the trailing edge at the beginning of the flare so that the TTI will decrease pressure while increasing velocity, then the bell flare reduces pressure even more as the higher velocity gas expands into it, which in turn makes it easier for the exhaust gases behind the TTI(that have not passed through the TTI yet) will more easily exit the system, while the TTI prevents reverse from the pulse wave.
If you place the TTI too far into the flare and it sits in the flare it wont cause the exhaust to squeeze past the TTI and increase the velocity.
If you dont have any baffles at all in those pipes as they are now, then you simple want to measure 1~1 1/2 inches away from the shortest part of the Slash Cut and place the TTI so that the trailing edge of the Disc is just about 1inch away from it.
Just make sure you measure the diameter of the pipe and get the right sized TTI for them.
Last edited by FranBunnyFFXII; Mar 2, 2024 at 03:43 PM.

















