BUILDING A LOADED 128ci FATBOB

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Using S&S Cylinders, APE Pistons, Screamin' Eagle CNC Ported heads with S&S Roller Rockers, CR515 Camshaft from APE, BAKER Compensator & a TRASK Clutch Basket. This Fatbob is loaded with top quality parts.
The customer had selected & purchased his parts & brought them to me for installation. Unfortunately, the pistons were for a 124ci combo & not a 128ci combo. Leading to a change in components. If you're wondering how I missed seeing the label on the box saying 124ci then you're not alone! I want to know how I missed it too.
I think what has happened is, when the pistons arrived we were all keen to check out the teflon & ceramic coatings on them it was missed in the excitement. Obviously I should have checked more thoroughly but I fell victim to assuming it was all ok.
Luckily I always check that all engines I build roll over prior to & after the valve train is installed.
The TRASK Clutch basket was a great addition to the build & easy to fit.
Once the OEM Clutch assembly is removed & disassembled you simply drill out the rivets holding the OEM basket to the ring gear, then further drill out the ring gear holes to accommodate the larger diameter bolts that hold it in place over the rivets.
The remaining OEM components of the clutch assembly fit straight in with no issues whatsoever.
The BAKER Compensator assembly is different from all the others out there & being the first one I've fitted, I have no opinion on it as yet.
The run-out was sitting just over 5thou & the recommended max from S&S is 5 thou so it was decided to not install it & keep running the OEM pump & plate which is absolutely fine to run.
It has been in there from day 1 & has worn with the run-out, plus the Harley-Davidson service limit is 12thou so we are still in spec.
Check out my MEMBERS Section on the channel for exclusive member benefits.
Thanks for watching. Leave any questions or concerns in the comments.

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Опубликовано:

21 ноя 2023

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Комментарии : 40

@parnellsc 8 месяцев назад

I love opening up my computer and seeing you have a new video uploaded. Cheers from the USA my friend!

@MasterTechMiller 8 месяцев назад

Thanks for watching 👍 I'm glad you enjoyed joy the content. I'm making a big effort to have more regular content.

@philbachmann6398 8 месяцев назад

You can can sense the power. I've been riding since I was 16 and am now 68 so I know. Love the build. 🙏🇦🇺

@MasterTechMiller 8 месяцев назад

Yeah she's definitely got plenty of grunt! Thanks for watching 👍 It would be VERY easy to get into trouble on this one.

@madddog692000 8 месяцев назад

Nice build! That thing lit up the tire right there near the end of the video!

@MasterTechMiller 8 месяцев назад

It lit the tyre up ALOT during the test ride 🤫🤫🤫 Just want to be careful with how much 'Fun' I post.

@MasterTechMiller 8 месяцев назад

Thanks for watching 👍

@madddog692000 7 месяцев назад

@MasterTechMiller I watch all of your content, have been for quite a few years. Straight to the point, no bullsh@t, just the way I like it.

@roncoburn7771 8 месяцев назад

Hey tommy just my luck I buy CR 540 then wes comes out with 2 new ones so we will see what this 131 will do with 12.1 comp. you should really check out Jims piston ring compressors at Head Hoggers they are slick.no more ratchet compressors for me great video keep up the good work.

@nickthinkpainting1978 8 месяцев назад

Did customer supply clutch upgrade .. I run a CR480 in my 114. The hot arms here in USA right now are Star racing.

@MasterTechMiller 8 месяцев назад

Yeah he did. It's a TRASK one.

@proman5498 8 месяцев назад

Hey there Mr. Miller..Much respect and appreciation..thank you for sharing your knowledge and know how with all of us. My question is the difference between the roller rockers and standard rocker arms..it changes the lift of the cam correct? Could you do a video going into detail on this? Also screaming eagle makes adjustable rocker arms with the idea that the exhaust valve tip wares faster than the intake so you could adjust lash every 25-50k miles without replacing worn valves etc..part# 17300069 and 70..last of all pushrods- how to get better oiling up top. Some adjustable pushrods are more rigid than others and some have a bigger hole to move more oil up. What do you suggest? Is there a sweet setup you recomend? Thanks again..take care and stay safe!!

@MasterTechMiller 8 месяцев назад

Awesome question mate. Ok so there is 2 types of roller rockers. Stock ratio & a more aggressive ratio. When using the stock ratio nothing changes with the lift. The roller rockers air in reducing side loading on the valve stem when using high lift cams. The bigger ratio roller rockers increase the lift if the cam & you have to be careful with piston to valve clearances. The adjustable rocker arms are good in the sense you can precisely set the opening of both valves. That's about it, the Hydraulic lifters take care of the clearances.

@MasterTechMiller 8 месяцев назад

I really like the Screamin Eagle adjustable pushrods. They are very strong & have a big oil passage to get lots of oil up the top. S&S make a good option too but I prefer the Screamin Eagle option.

@charlesmccurry3602 5 месяцев назад

What throttle body and injectors

@ianwilliams7375 8 месяцев назад

I have a 2019 fat bob. Great video really good. Music on this vid is excellent can you tell me what it is?

@MasterTechMiller 8 месяцев назад

Thanks for watching! I got the music from the RU-vid music library. I'll get the name of it for you

@ianwilliams7375 8 месяцев назад

Thanks Tommy appreciate that. As mention I’ve got a stage 2 fat bob with s&s 475 and dynoyed with good numbers. But first and Semco d gear at low revs it’s a bit twitchy. Any thoughts?? Love you videos probably my favourite skilled tech to watch 👍🏻

@TheCuttz1984 8 месяцев назад

I have been highly considering the ss stroker kit. Great number to see here. Was it the cycle Rama 515 can you pair with this? I have a feeling I will require a flywheel by the time my build happens. Would you recommend this way over a 131?

@MasterTechMiller 8 месяцев назад

Yes this combo has the CR515 Camshaft. Going the 128ci was the customers choice as he had already purchased the all the parts. I would personally go with a 131ci over a 128ci

@mickcowie1864 8 месяцев назад

💪🏻💪🏻💪🏻💪🏻👌🏻

@user-lu6pc7vl3x 8 месяцев назад

Hey mate watch ever video.... What's best air suspension for 2017 breakout From Perth Australia

@MasterTechMiller 8 месяцев назад

Thanks for watching. The only one I've used on Twin Cams is Platinum Air. Haven't had any issues with them before.

@brian0694 8 месяцев назад

What exhaust would you suggest for that type of build

@MasterTechMiller 8 месяцев назад

D&D Lowcat 2-1

@RickyG512 8 месяцев назад

Hi Miller, I'd really like to research these gold and blue S&S pistons, howeever I can't find their existence anywhere on the internet, it's not on the S&S website, can you point me to these gold and blues? Thanks

@MasterTechMiller 8 месяцев назад

These ones were coated by another company. The customer organised it. It was a company called competition Coatings in Brisbane Australia

@RickyG512 8 месяцев назад

@MasterTechMiller amazing, thanks mister miller

@michaelmitchell5909 8 месяцев назад

Why is the sns so strict on runout with a chain drive?

@MasterTechMiller 8 месяцев назад

Because the brass bushing on the pinion shaft is only.pressed into place with nothing to stop it rotating if it catches/wears out (which they do). When that happens, the brass bushing rotates & blocks off the oil feed to the crank big end bearings. The SE plate runs a brass bushing that is knurled into place eliminating the possibility of rotation

@michaelmitchell5909 8 месяцев назад

@MasterTechMiller thank you for the detailed explanation. I really appreciate that. So is my 04 s.e. cam plate with the bearings not brass bushings is slightly better?. Can you replace the brass bushings?. Also is the fueling oe cam plate the same way?....needs a minimum runout also.

@MasterTechMiller 8 месяцев назад

@michaelmitchell5909 I'm not sure about the early SE cam plates for the Twin Cams. You can replace the brass bushings in these M8 SE cam plates. The Fueling plates run a plane bearing (no bushing) just relies on oil for lubricantstion like the OEM Cam plate.

@michaelmitchell5909 8 месяцев назад

@MasterTechMiller thanks again Tom, much appreciation from Mike, over here in Pittsburgh, Pennsylvania, USA....

@MasterTechMiller 8 месяцев назад

@michaelmitchell5909 no worries mate 👍 Thanks for watching.

@Ridehighfxdb 7 месяцев назад

Torque curve is weird under 3500 rpm

@MasterTechMiller 7 месяцев назад

The TBR pipe is responsible for that

@sashamiric2450 8 дней назад

Very surprised that you did not check / measure piston height in cylinder before putting on the heads so you actually understood the final comp ratio. Not really good engine building practice, just saying.

@MasterTechMiller 8 дней назад

@@sashamiric2450 Do you know how video editing works?

@sashamiric2450 8 дней назад

No not realy but i would have thought some of these checks would be just a given.@MasterTechMiller

@MasterTechMiller 8 дней назад

@sashamiric2450 plenty of other videos on my channel showing the use if micrometers, bore dial gauges & even white boars explanations on how to correctly set & calculate final comp ratios. Both corrected & static comp ratios. Feel free to head over & check them out for any more info on the matter.