NEW 120ST Crate Motor w/dyno

6008 Views 20 Replies 14 Participants Last post by glide69, Nov 18, 2015

waldawg

Discussion Starter · Oct 31, 2015

Just got my 2012FLTRX back tonight with the new 120ST Crate Motor installed. I changed nothing on the motor itself, added SE heavy air breather, and Drago's Dragula 2 (2into1 pipe w/2.55 baffle). I'm using the SERT. Crate motor comes with SE259E cams installed.

Final dyno numbers were 119.5hp @ 5531rpm and 133.0tq @ 3500rpm. Dealer was running a 20% off special on all SE parts so I got the motor at a great deal. Replaced a 103 Stage 2.

Couldn't pry the smile off my face with a crow bar!

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waldawg

Discussion Starter · #2 · Oct 31, 2015

Motor...

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Nordic Berserker

· #3 · Oct 31, 2015

Very nice, congrats

Reactions: 1

Smarty

· #4 · Oct 31, 2015

Will be a fun ride for sure.

Reactions: 1

tj316

· #5 · Oct 31, 2015

I love mine

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Triplej

· #6 · Nov 1, 2015

Lucky dawg - enjoy the extra power!

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RGKen

· #7 · Nov 1, 2015

Congrats man! Enjoy!

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RGKen

· #8 · Nov 7, 2015

tj316 said:
I love mine

I'm sure you do! But let's be real, you don't have an ST anymore do you!? :wink:

tj316

· #9 · Nov 7, 2015

RGKen said:
I'm sure you do! But let's be real, you don't have an ST anymore do you!? :wink:

That's what my derby cover says . LoL

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Spazz

· #10 · Nov 7, 2015

Good numbers! I haven't dyno'd mine... I may do a pull just to see. I just received my PV and Target Tune module and 1074X Thunder Header yesterday....

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Smarty

· #11 · Nov 7, 2015

Just be careful not to lock up the brakes without the clutch pulled in and dropping the clutch from dead stop with high rpms. These cranks have been known to twist with all the torque and displacement. Enjoy

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RGKen

· #12 · Nov 7, 2015

Smarty said:
Just be careful not to lock up the brakes without the clutch pulled in and dropping the clutch from dead stop with high rpms. These cranks have been known to twist with all the torque and displacement. Enjoy

Before I decided to have the 120ST put in my bike I asked the performance guy at my dealer about this. He laughed and said that this crank would hold up with no issues. After a proper tune and break in I have tested his theory a few times and so far it has taken the punishment. Depending on the surface it will either smoke the rear tire or if I get good traction it will bring the front end off the ground. I really don't plan to do this type of start anymore as I just wanted to see what it would do but if I do and it breaks, I will just take it back to them and call him out on it. Don't think I will have to though and I'm happy with the way they have taken care of me so far. I've treated them with kindness and they have returned the favor several times. I feel very lucky to have a dealership like this after all the bad stuff you hear about.

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akjeff

· #13 · Nov 7, 2015

Smarty said:
Just be careful not to lock up the brakes without the clutch pulled in and dropping the clutch from dead stop with high rpms. These cranks have been known to twist with all the torque and displacement. Enjoy

Not a particularly good idea, regardless of who makes the motor.

To the OP, looks like you have great running motor/tune.

Jeff

Reactions: 2

Sethjamto

· #14 · Nov 11, 2015

What else did you do beside the motor swap? Any clutch upgrades or tranny upgrades?

USMCEOD

· #15 · Nov 11, 2015

Nice work. Having said that does anyone else think a thread like this should be required to have a sound/video clip?

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BadX

· #16 · Nov 11, 2015

I bet that thing is a blast to ride. Enjoy and ride safe.

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sj01fltri

· #17 · Nov 11, 2015

Good numbers,looking at an engine swap in a couple years,too many chioces out there LOL.Hope you enjoy it for many years to come.

Reactions: 1

tj316

· #18 · Nov 11, 2015

Sethjamto said:
What else did you do beside the motor swap? Any clutch upgrades or tranny upgrades?

When I installed my 120ST I did nothing to the tranny , I already had a Barnett Scorpion Clutch installed so I didn't need to do anything to it either

Reactions: 1

waldawg

Discussion Starter · #19 · Nov 18, 2015

Sethjamto said:
What else did you do beside the motor swap? Any clutch upgrades or tranny upgrades?

I upgraded the clutch to the SE clutch. The dealer said the stock tranny would work. I already had the SE tuner.

HellInABucket

· #20 · Nov 18, 2015

Looks really great, congrats, and be safe!

Parenthetically, I find these weird graphs with 3 different scales on one axis puzzling and difficult to read. I guess some tuners use different tools/software, but it sure is annoying.

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