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New Schumacher KF2

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R/C Tech Forums Thread Wiki: New Schumacher KF2
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Welcome to the KF2 Wiki!

Please feel free to add any Tips, Tricks, or anything that would be beneficial to the KF2 Family

Introduction and Pictures Introduction and Pictures

ElectronicsSetupElectronicsSetups

Setup SheetsSetup Sheets

EmulsionShocksEmulsion Shocks

Tony Newland Gear Diff BuildTony Newland Gear Diff Build

Suggested Gearing

6.5
7.5
8.5
9.5
10.5
13.5
17.5 I ran 69/31 at SRS Scottsdale Arizona and 72/30 at MHOR Aurora Co and Full Throttle ALB, NM RCM lockout worked excellent!


MIP pucks excellent upgrade! The new RCM lockout is an excellent piece as well! These options will greatly reduce weight throughout the drive line!

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Old 02-08-2015, 07:09 PM
  #61  
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Originally Posted by leongkc View Post
This is what you need to build a full U4199:

U3852
U3853
U3854
U3855
U4196
2.5mm diff balls (carbide or ceramic) I personally prefer carbide at U2459
U3140
U1954 (Optional)

It is a K1 diff after all, so look at this:
http://www.racing-cars.com/images/Te...1_exploded.pdf

looks like you need a U4124 - SPEED PACK - Shims 5 x 7 x 0.4mm - pk6
U3855 isn't available either, but they are just 5x10x3 bearings.
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Old 02-08-2015, 07:39 PM
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piecing the diff together appears to cost ~95
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Old 02-08-2015, 08:26 PM
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just buy it built I think it's $50 cheaper
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Old 02-09-2015, 01:05 PM
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I have a KF that I am interested in upgrading to the KF2. I was going to get the LG chassis for the KF but I really like some of the features of the KF2. I already have the shorty conversion kit.

My thinking is that if I buy the new KF2 Carbon Fiber Chassis, new Side pods with the new chassis brace, new center parts for slipper, motor mount, side gears etc... then it should be the same as a KF2.

Can anyone confirm of deny my assumptions? Just wonder if it is doable or not or if there are some more significant changes I would have to make.
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Old 02-09-2015, 01:20 PM
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Originally Posted by Riverbluff View Post
I have a KF that I am interested in upgrading to the KF2. I was going to get the LG chassis for the KF but I really like some of the features of the KF2. I already have the shorty conversion kit.

My thinking is that if I buy the new KF2 Carbon Fiber Chassis, new Side pods with the new chassis brace, new center parts for slipper, motor mount, side gears etc... then it should be the same as a KF2.

Can anyone confirm of deny my assumptions? Just wonder if it is doable or not or if there are some more significant changes I would have to make.
nope.. just buy a KF2. The rear bulkhead is different. the tranny is different. by the time you get all the parts you want to upgrade it to the KF2 you would be better off selling your KF and pay the remaining balance
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Old 02-09-2015, 07:51 PM
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Originally Posted by hanulec View Post
anyone planning on running the KF2 at motorama? i shook down my KR cars yesterday and will try to run this new KF2 prior to the event. any starting setup advice would be helpful.

in particular, i think i need to get my hands on a ball diff prior to the event. KF setups from Tom C and Carson W both listed ball diffs. anyone know where i can get a U4199 diff?
I ran my car twice Tq and win at Criters on Friday and 5th overall at the Wolcott race this Sunday. front spring 4.0 rear plate was dink 2
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Old 02-14-2015, 03:32 PM
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Where is the best place to get parts for this car in the US?
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Old 02-14-2015, 03:46 PM
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Discountrc.com
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Old 02-14-2015, 08:31 PM
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Discountrcstore.com
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Old 02-14-2015, 09:56 PM
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So I pulled the trigger on this guy and was just wondering what should be upgraded out of the box if anything?

Also, on the front of the car, what is the difference between the 0 degree and 5 degree caster blocks? What is the 5 degrees going to do to the car over the 0?

Also, what is a good set of spares to keep? What breaks the easiest?

Thanks in advance!!
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Old 02-15-2015, 08:32 AM
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Here's a link to the manual, It can answer most of the basic stup questions you may have....

http://www.racing-cars.com/images/Te...KF2_manual.pdf

Last edited by Tony Newland; 02-15-2015 at 11:18 AM.
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Old 02-15-2015, 10:27 AM
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Did anybody feel a need to shim the rear arms?
There seems to be quite abit of play there after a few runs.
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Old 02-15-2015, 05:38 PM
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Originally Posted by leongkc View Post
Did anybody feel a need to shim the rear arms?
There seems to be quite abit of play there after a few runs.
No, I have the small amount of front to rear play also. Not bothering me at all. The play may not be there when you first build the kit if you don't seat the pivot balls all the way into the aluminum holders. You can shim it, if it is bothering you.
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Old 02-21-2015, 08:17 PM
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Couple of questions.

1) What diff fluid should I use? I have some 2K I used in my B5M. Is the ball diff better than the gear diff on carpet? (RCplus guys?)
2) Maybe a stupid question, but do you locktite the screws that go into alloy?
3) I picked up the CF chassis and was wondering what chassis protector you guys are using.
4) Shock oils? (Again RCplus guys) 37.5 in the front and 32.5 in the rear?
5) Are the springs that come with it good to use or should I get a different set?

I have been out of the hobby for awhile, built a B5M, and now I am hooked again!

Thanks!!
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Old 02-21-2015, 11:17 PM
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Will these work for the KF2?

http://www.amain.com/mip-pucks-shiny...system/p374937
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