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Old 08-28-2015, 08:33 PM   #1
jasuo
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Thumbs up Kartboy 6 spd shifter adapter and bearings kit

Quick post on this awesome short shift adapter put out by Kartboy. The below picture is basically what you get (minus candy, two O-rings, and some stickers) when you place your order. This is my first post btw so I may not do them enough justice, but I felt its been out for long enough to warrant a review by someone...


There is a group buy still going on in the Vendor 'Group Buy' classifieds if you can get in on it still.
Shift adapter group buy link

Quality of the kit is amazing, holding it in your hands and looking over you can see the attention to detail put in each piece. The pin is welded in seamlessly and the plating is great quality. The plate is noticeably lighter than the factory piece, when you replace it you'll probably be like me and wonder why on earth they'd put something so gaudy in the car there.

I will have to admit if you are not a mechanically inclined person and/or have access to a lift, the install is going to be a pita. Do not take shortcuts (remove the heat shields) and be patient. Also use the appropriate tools. All that being said there are some members who have performed the install with their car on jack stands and kudos to them!

Immediately after installing the adapter and bearing I took the car out for a cruise. I bought the 2016 Premium WRX with no factory STS, I have tested a friend's STS for comparisons sake. The Kartboy kit feels much tighter and the throws are incredibly short, they claim 38% and I'd wager its just about right at that. There may be an initial learning curve for you due to the tightness of the kit, I sometimes felt I was not in gear when I actually was but maybe this is more on me as the driver. I've put about 100 miles on it and it's working flawlessly, I intend to come back here and update the post as I rack up the mileage.

If you are hesitating on buying this kit, save yourself the inner conflict and buy it already! Apologies to Kartboy if this isn't enough of a review like I'm sure your previous pieces have garnered in the past.
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Old 08-28-2015, 11:50 PM   #2
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Thanks for the honest review. We shipped roughly 300 units this last week. All reports so far have been quite positive.


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Old 08-29-2015, 02:01 PM   #3
raven1231
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The kit is definitely of very high quality. I will be attempting to install mine via jack stands on Monday, as that's all I have access too. Wish me luck!
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Old 08-31-2015, 11:27 AM   #4
TheStig1293
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I have to agree, overall the quality of the piece is great. I installed mine over the weekend and while the install is not the simplest thing in the world, I got it done in about 2 hours with help and on jack stands. I have the factory STS also and combined, the two make the shifts very short. It will take some getting use to, cause like the OP I sometimes am not 100% sure I am completely in gear. The shifts are now just a flick of my wrist.

The only complaint I have is that when installing, the kartboy adapter is loose on the shaft that connects the plate to the transmission. The factory plate did not move what so ever when on the shaft but the Kartboy piece can swing either direction. Not sure if that has to with it being so much smaller than the factory piece and therefore has room to move or just that the diameter was a little off.

That is just a very nitpicky complaint of mine, as it does not hinder the performance or use of the piece at all. I am extremely happy with the adapter and definitely recommend for all interested to purchase it. Hands down one of the best mods for the buck on the 15+ WRX in my opinion.

I will add that soon I should be getting a heavy weight shift knob, so I will update this post with my thoughts after the knob change.
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Old 08-31-2015, 02:21 PM   #5
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Loving this mod. At first I was a little skeptical of how short the throws are with the OEM short throw shifter and this Kartboy adapter. But after spending a few days getting used to it, I'm loving it.

Though, this mod will finally force me from an OEM shift knob to a heavy aftermarket knob. The new shift feel is quite notchy but nothing a heavier knob can't fix.

Well worth the money/time for install, if you ask me.
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Old 08-31-2015, 02:56 PM   #6
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Just got done installing this....

Install: Pain in the ass lol. I was using jack stands and outside in 90 degree weather . It took me four hours. Also, as a few others have mentioned I wasn't able to get the small pin back in, only the larger 3/16 pin. Anyway it seems to be holding up ok. I also had issues with the shield not wanting to line up at the end, making it nearly impossible to get the bolts back in it .

Product: Amazing quality piece. The piece itself is solid and very high quality. The shifts are extremely short and are noticeably much more notchy. I have a heavy weight Anarchy Motive Mammoth shift knob and combined with the perrin shifter stop and now the kart boy short shifter adapter, I would have to say the shifting is perfect! It's very close, precise, and solid shifting!

Thanks Tom for such an amazing piece, at an affordable price point!

Last edited by raven1231; 08-31-2015 at 05:03 PM.
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Old 08-31-2015, 03:02 PM   #7
96accord
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Quote:
Originally Posted by sc00ter View Post
Though, this mod will finally force me from an OEM shift knob to a heavy aftermarket knob. The new shift feel is quite notchy but nothing a heavier knob can't fix.
I like the OEM shift knob. I bought the Kartboy knob (not delrin) and used it for a day (still haven't installed the Kartboy shifter adapter - just Perrin Shifter Stop) and I don't like the Kartboy knob. But that's just me.
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Old 08-31-2015, 10:02 PM   #8
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Thought I'd share throw measurments for the 3-4 shift.
Stock factory shifter measured from dash to the center of the shift knob:
Fourth - 9"
Third - 4-3/4"
Throw = 4-1/4"

Kartboys shift arm installed:
Fourth - 7-5/8"
Third - 5"
Throw = 2-5/8"

Throw reduction in inches = 1.625 (or 1-5/8)
Throw reduction percentage 1.625 / 4.25 = 38.23%
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Old 08-31-2015, 11:08 PM   #9
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Completed install tonight on my '16 WRX. My favorite tool to punch out that shotty roll pin! 1/8" punch inside long spark plug extension.

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Old 09-01-2015, 11:24 AM   #10
areber04
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Anyone have an installation video available? I'd like to know what I'm getting into before I start this. I guess I'll also be stuck using jack stands.
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Old 09-01-2015, 12:27 PM   #11
DMBeer41
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Quote:
Originally Posted by areber04 View Post
Anyone have an installation video available? I'd like to know what I'm getting into before I start this. I guess I'll also be stuck using jack stands.
Use the subispeed install video for the Perrin adapter. It's the same installation. The bearing is installed easily by putting the bearing in place and tightening the washers to pop it in.

I'm a complete rookie under the car and it took me about 2.5 hrs with the car on jack stands. If you have the right tools (pin punch, rachets with adapters, screwdrivers, hammers) it's a fairly straight forward install.
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Old 09-01-2015, 01:02 PM   #12
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It took me a few days to get used to the shorter throws (felt like it wasn't in gear) but now that I'm used to it, it really feels great. Shifts are very notchy and short. Any shorter and it would be too short.

It does require a little extra effort to get it in/out of gear and I already have a weighted knob. Getting it into reverse is sometimes a struggle but not a huge deal. I do have trouble with the 2-3 shift. I find that it takes much more effort to get it out of 2nd and I end up hunting for 3rd for 2 or 3 seconds. I think its just me though...need more seat time.

Otherwise for $100, this dramatically improves your driving experience.
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Old 09-01-2015, 01:12 PM   #13
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Quote:
Originally Posted by mxl16 View Post
Getting it into reverse is sometimes a struggle but not a huge deal.
At least for me, to get around this I changed up the way I go into reverse slightly. I used to lift the reverse lockout, push as far to the right as possible and down into reverse.

After installing the shift adapter I push the lever just past the lockout and down. I found if I pushed it as far right as possible it was a bitch to get down into reverse. Obviously ymmv, but it worked for me.

Side note - I always shift into 2nd before reverse.
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Old 09-01-2015, 09:43 PM   #14
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Old 09-03-2015, 02:04 AM   #15
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Well, Here is my review.

Did the install off ramps with a friend. Took us two hours to do the install due to the fact i took forever to get the thing together with both o-rings in place. It is possible to do with patience. Also the pin is easy to get in and out with a air hammer. Just saying.

Overall i am happy with the part. it is much shorter then stock and gives is a nice feel. I have a weighted knob so that may help with the feeling. Overall will recommend to people.
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Old 09-03-2015, 09:57 AM   #16
Frank217
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Quote:
Originally Posted by mert34 View Post
Well, Here is my review.

Did the install off ramps with a friend. Took us two hours to do the install due to the fact i took forever to get the thing together with both o-rings in place. It is possible to do with patience. Also the pin is easy to get in and out with a air hammer. Just saying.

Overall i am happy with the part. it is much shorter then stock and gives is a nice feel. I have a weighted knob so that may help with the feeling. Overall will recommend to people.

Where do the actual orings go ?
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Old 09-03-2015, 10:38 AM   #17
609blk15wrx
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Quote:
Originally Posted by Frank217 View Post
Where do the actual orings go ?
http://forums.nasioc.com/forums/show...&postcount=661
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Old 09-05-2015, 01:32 AM   #18
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Anyone install it and not like it?

I bought one, but idk if i will like it.
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Old 09-05-2015, 12:58 PM   #19
609blk15wrx
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What's not to like? You either want a shorter shift or you don't.

The main differences have been discussed already. It takes more effort to shift (possibly fixed by getting a weighted knob), the shift feel is pretty knotch-y with the bearing installed (similar to the brass bushing but smoother) and the noise created by the piece from outside the car is a little louder but not noticeable when driving.

If you feel like those will be a problem, then maybe it's not for you.
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Old 09-06-2015, 10:24 AM   #20
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Phew, got that all taken care of. Finally got it installed!

I've installed/used several short shifters before, and I'm also not easily impressed nor will I pretend to like a mod just because it has a huge community behind it. My last car was an RX8 and forums ranted and raved about a short shifter for it that was supposedly and literally the best mod for the entire car. Installed it and it was....decent. I was REALLY not hoping for a repeat of that, especially since this was so much harder to install than a traditional short shifter.

And thankfully this mod delivers. The ONLY thing I can compare this to is a Corvette C6 Z06 with a short shifter installed on it that I've driven before, the throws are that short. For you guys wanting to stack the Boomba shifter on this as well, you're nuts lol the throws would be ridiculous short and not in a good way in my opinion.

Overall, if you want a shorter throw and are on the fence worried about they hype, fear not. This mod drastically changed the shift feel. I'll have to get used to it, but I'd rather do that than pay all that money and go through all the hassle for a anticlimactic result. Great job KartBoy!

Last edited by ScoobNoob89; 09-06-2015 at 07:43 PM.
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Old 09-06-2015, 03:43 PM   #21
Matt.
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So took me a few long hours to finish but worth every minute, as long as you have the right size punch, it'll be cake. I LOVE the throw of the shifter now, I have an sti short throw, Perrin bushing, weighted anarchy motive knob and now it's perfect. Remember if you're gonna do it on jack stands just take your time.
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Old 09-08-2015, 12:44 AM   #22
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I'm a super novice and got this done in about 90mn with a friend's help. Wasn't really that bad. I had already done the Perrin shifter busing, so this was just a couple steps more. I did switch out that bushing for the bearing provided by Kartboy. (if anyone is interested in it PM me).

Performance is crazy short!! I wouldn't want it any shorter and it takes some getting used to but I definitely like it!! It really shines when you are shifting fast and hard. There is definite increase in the amount of force you need to get it in gear and I'm still questioning from time to time to time whether it is in gear or not, but IT IS!! For me it's great, super glad I did it.
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Old 09-08-2015, 03:40 AM   #23
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Quote:
Originally Posted by skubie76 View Post
I'm a super novice and got this done in about 90mn with a friend's help. Wasn't really that bad. I had already done the Perrin shifter busing, so this was just a couple steps more. I did switch out that bushing for the bearing provided by Kartboy. (if anyone is interested in it PM me).

Performance is crazy short!! I wouldn't want it any shorter and it takes some getting used to but I definitely like it!! It really shines when you are shifting fast and hard. There is definite increase in the amount of force you need to get it in gear and I'm still questioning from time to time to time whether it is in gear or not, but IT IS!! For me it's great, super glad I did it.
Was there a noticeable difference between the Perrin bushing and the Kartboy bearing? If so, could you describe it a bit more?
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Old 09-08-2015, 10:33 AM   #24
sawthetha
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For anyone whose WRX has been through a salty winter, get that WD-40 ready. It was a hassle and a half trying to force off those seized bolts, but it was well worth it though.

Also, be very careful not to lose the tension pins when you punch them out. I lost mine and tried finding some at auto parts stores, only to find out the OEM pin is 6mm, NOT 3/16". Most (if not all) stores in America won't sell tension pins in metric, so I had to find it the hard way inside the car.
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Old 09-08-2015, 04:26 PM   #25
Dorian7
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I bought one of these too and am now wondering if I should go with the perrin piece. I definitely want shorter throws but 38% might be too much (perrin is 30% shorter).

I am hoping someone can make a video like from above the shifter view to demonstrate how short the throws really are.
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