Real World experience with RK TECH Kits?

[edavis0202]

Ok Guys, my warranty is up in December next year and I probably won’t ride before then anyway so I want to open up the motor and do some work. For me there is no reason to snocheck a ’13.

Anyone got any real world input on RK TEC’s “Drop In Kit” to see how she does. I know they do their homework and have proven themselves time and time again. I live in Iowa, but ride out west, besides running race gas around home is there TRULY anything I need to worry about or is it a pull and go?

Also, I will be adding a Carl’s Clutch Kit and C3 Belt Drive…it has a Super – Q can already.

Thanks!

 

[M8Chris]

Id like to hear some info on rk teks head and big bore

 

[gman086]

Ok Guys, my warranty is up in December next year and I probably won’t ride before then anyway so I want to open up the motor and do some work. For me there is no reason to snocheck a ’13.

Anyone got any real world input on RK TEC’s “Drop In Kit” to see how she does. I know they do their homework and have proven themselves time and time again. I live in Iowa, but ride out west, besides running race gas around home is there TRULY anything I need to worry about or is it a pull and go?

Also, I will be adding a Carl’s Clutch Kit and C3 Belt Drive…it has a Super – Q can already.

Thanks!

I can tell you that he has a big following on Dootalk and for good reason - the drop in kit flat out works and is truly pull and go. I've ridden a few sleds with his drop ins and they definitely pull harder than stock. Check with him about fuel requirements tho - his setups use less fuel so he's recommending the non-ethanol plug with ethanol gas at altitude. Would be good to know what he's recommending at sea level.

Have FUN!

G MAN

 

[PaulAnd]

Runs very well in my cfi-4, drop in kit w/head, no mods. Pulls VERY hard now.

 

[Super Sled]

Anyone of the Drop In Kits have like 2,000 - 3,000 miles on them yet to test durability/ reliabilty of the kits in the long term?

 

[gman086]

Anyone of the Drop In Kits have like 2,000 - 3,000 miles on them yet to test durability/ reliabilty of the kits in the long term?

A LOT of them on the Series III Doo motors but very doubtful on the Pro's because it's a new kit. The parts he uses are solid (tho he did go thru a stumble with some pistons years back, that got fixed), it's the stock cylinders that are suspect and Indy Dan has a fix for that. Kelsey's kit may or may not alleviate the need for Dan's Fix due to piston side-loading, only time will tell. I'm probably going to do both to be on the safe side!

Have FUN!

G MAN

 

[edavis0202]

Hearing about Polaris beef up their cylinders on the 13's makes me wonder is it worth buying the fix kit or not.

I guess the main reason I wanted a 13 in the first place is because of the belt drive, but C3 has a kit coming out for $875 pre-order and if I add RK's Kit thats another $800 plus labor to instal it.

With that being said, I might be better off with snow checking now.

I really just want more power out of 12 without having to mess with EFI Box...along with adding the belt drive of course.

 

[pus1100]

A LOT of them on the Series III Doo motors but very doubtful on the Pro's because it's a new kit. The parts he uses are solid (tho he did go thru a stumble with some pistons years back, that got fixed), it's the stock cylinders that are suspect and Indy Dan has a fix for that. Kelsey's kit may or may not alleviate the need for Dan's Fix due to piston side-loading, only time will tell. I'm probably going to do both to be on the safe side!

Have FUN!

G MAN

i have 400 km on the drop in kit for my 2011 pro.side loading will be a lot less,since the high quality forged pistons are 80 grams lighter.have no piston slop.PTW clearance on my stock pistons was HUGE,0.25 mm measured 10mm up on skirt.RKTs pistons were a lot tighter with 0.14mm.no more rattling from engine,just the good old p85 rattle.sled pulls harder and revs higher with the same clutching.that is more power in my book.haven't had any issues yet.running sea level to 4000 feet.if i had another aftermarked head or SLP package i would have opted for RKTs replacement pistons due to the tighter PTW clearances and much higher quality.i do not think i will have any problems with cylinder skirts in the future.

 

[Rally2]

i have 400 km on the drop in kit for my 2011 pro.side loading will be a lot less,since the high quality forged pistons are 80 grams lighter.have no piston slop.PTW clearance on my stock pistons was HUGE,0.25 mm measured 10mm up on skirt.RKTs pistons were a lot tighter with 0.14mm.no more rattling from engine,just the good old p85 rattle.sled pulls harder and revs higher with the same clutching.that is more power in my book.haven't had any issues yet.running sea level to 4000 feet.if i had another aftermarked head or SLP package i would have opted for RKTs replacement pistons due to the tighter PTW clearances and much higher quality.i do not think i will have any problems with cylinder skirts in the future.

What compression are the domes in your setup? And what was your shift RPM before and what is it now after installing the kit? I had the RKT drop-in kit in my 04 Summit 800HO and definitely picked up power on that motor. Shift RPM was 8000 stock (7950 according to manual) and with RKT kit and clutched for 8300 it was noticeably stronger. Hopefully the 800CFI kit works as well.

 

[pus1100]

What compression are the domes in your setup? And what was your shift RPM before and what is it now after installing the kit? I had the RKT drop-in kit in my 04 Summit 800HO and definitely picked up power on that motor. Shift RPM was 8000 stock (7950 according to manual) and with RKT kit and clutched for 8300 it was noticeably stronger. Hopefully the 800CFI kit works as well.

shift rpm was 8200 before pistons got worn out,then i struggled keeping 8000.sweet spot now is 8450 according to playback on the MFD.havent touched the clutching yet.domes were marked 13.i guess thats the CR.tried it with 10% ethanol fuel with 160 ohm resistor in.did not have any issues

 

[JedInUtah]

I know this is not in a Polaris Pro motor, but I will still give you my experience with the Drop in Kit from RK Tek.

I have a 2005 REV. I needed to freshen up my motor and have known Kelsey and his work for some time from Dootalk. I decided to go for his drop in kit, I also did a reman crank.

I got one of the first sets, if not THE first set of his new forged pistons. That was almost 2 years ago. They have run flawless and turned plenty of heads. My sled has been nicknamed by many in the group I ride with, "the lil' 800 that could." It seriously just keeps going and strong. I have 1200 hard miles on this engine so far and not so much as a hiccup.

My setup- 6000-10.5K Ft. Running 91 pump/ no mix
RK Tek drop in kit - dual ring forged pistons, RKT 14.1:1 head
HPS can
Needle raised one clip
360 main jets (Stock jets were 400's FYI) I could really drop to 350's if I wanted and still be safe according to wash. His engines are that efficient!
No thermostat- always properly warmed up.
Clutch work

With this engine I can hold my own against any of the newer sleds at this point. It pulls hard and strong. Deep powder pulls, climbs, engine hangs right in there and runs!

You will not be disappointed in his kit. Take your time and make sure your build is clean and tolerances good and your engine will last a long time and run hard.

I am NOT nice to my motors, trust me.