Rk Tek Drop in kit RESULTS

jwentzer · May 9, 2013

RKT,

I have a question for you. I'm looking at changing to your pistons as one of my options this summer on my sled. 12 Pro 800, 700 miles, 600 of them with Silber Turbo @ 8 to 10 psi. The question is....should I have the cylinder skirts MPI (mag particle inspected) prior to installing your pistons? Or, are the cracks very visible with the naked eye? If they aren't cracked yet, is there still the possibility of them cracking and letting loose with your pistons installed? Or, is it very unlikely for that to happen since your pistons take the "slap and slop" out of the cylinders vs current oem pistons?

Thanks

Kraven · May 9, 2013

RKT said:
Hundreds of riders have well over 1000 miles at the lower elevations.. Whether or not they frequent SW is unknown..

This kit is rock solid with no issues... As you can read (with all the different threads related to it), there are many happy people running this kit and we are confident this will continue for may seasons to come

It's one thing to say you've sold 200+ kits

But to attest to the 1,000 + miles on each & every one of these sleds you haven't seen is a bit of a stretch

RKT · May 9, 2013

jwentzer said:
RKT,

I have a question for you. I'm looking at changing to your pistons as one of my options this summer on my sled. 12 Pro 800, 700 miles, 600 of them with Silber Turbo @ 8 to 10 psi. The question is....should I have the cylinder skirts MPI (mag particle inspected) prior to installing your pistons? Or, are the cracks very visible with the naked eye? If they aren't cracked yet, is there still the possibility of them cracking and letting loose with your pistons installed? Or, is it very unlikely for that to happen since your pistons take the "slap and slop" out of the cylinders vs current oem pistons?

Thanks

It is never a bad idea to have the cylinders checked for cracking. The cracks are not always apparent to the naked eye and there can also be fatigue that has set in with no signs of cracking.

So, the question is a loaded one for sure.. if the fatigue has set in or cracking is there but not apparent, the failure will , most likely,occur no matter what pistons you are using.

As for the 1000 mile thing... MOST sea level (eastern) riders can and do log 200-300 miles in one day... At that kind of intervals.. getting 1000 miles would only take 3-5 rides... Not really much of a stretch..

beeze455 · May 9, 2013

Are the guys on the over here on the east running your head too? We have low elevation and bad fuel over here... Looking to get my sled to 160+hp any suggested setups?

RKT · May 9, 2013

beeze455 said:
Are the guys on the over here on the east running your head too? We have low elevation and bad fuel over here... Looking to get my sled to 160+hp any suggested setups?

The head, alone, adds a solid 7-8HP at peak rpm and runs at STOCK compression ratio.. So, there is great power with the head by itself due to its patented design. Again, for sea level stock compression ratio is maintained so the fuel that works with your stock head also works with our billet head.

Once you rise in elevation, we can increase the compression ratio and gain back some power that elevation removes and stil be 100% safe on pump gas..

We have spent countless hours on these kits.. they are designed with reliability as the #1 concern.. The added HP, is a nice bonus, but HP is nothing if it is not reliable and retainable on the long pull..

beeze455 · May 11, 2013

RKT said:
The head, alone, adds a solid 7-8HP at peak rpm and runs at STOCK compression ratio.. So, there is great power with the head by itself due to its patented design. Again, for sea level stock compression ratio is maintained so the fuel that works with your stock head also works with our billet head.

Once you rise in elevation, we can increase the compression ratio and gain back some power that elevation removes and stil be 100% safe on pump gas..

We have spent countless hours on these kits.. they are designed with reliability as the #1 concern.. The added HP, is a nice bonus, but HP is nothing if it is not reliable and retainable on the long pull..

Any advantage to doing this on a sled with only 100 miles or should I wait until my warranty is up? Are you seeing the same issues with 13 sleds?

I was thinking of paring your drop in kit with a dynaport exhaust setup. His setup and your setup do not require fuel, so I should not have to mess with mapping and stuff. seems like a reliable setup and 10-20hp increase in power. Your thoughts?

rmscustom · May 11, 2013

beeze455 said:
Any advantage to doing this on a sled with only 100 miles or should I wait until my warranty is up? Are you seeing the same issues with 13 sleds?

I was thinking of paring your drop in kit with a dynaport exhaust setup. His setup and your setup do not require fuel, so I should not have to mess with mapping and stuff. seems like a reliable setup and 10-20hp increase in power. Your thoughts?

A fuel controller is a must have to run the drop in kit on a 13.

beeze455 · May 11, 2013

His web site says:

"
NO FUEL Controller required!!

In fact, we designed this kit to run on the oxygenated fuel (Ethanol) and still use the NON-ETHANOL factory resistor!! So, it extremely safe on bad gas!
"

tdorval · May 11, 2013

That is for the 11-12's unless something has changed. Kelsey had definitely mentioned needing a controller on the 13's due to leaner stock mapping or something.

rmscustom · May 11, 2013

tdorval said:
That is for the 11-12's unless something has changed. Kelsey had definitely mentioned needing a controller on the 13's due to leaner stock mapping or something.

Yep^^^ That's what Kelsey told me. His website needs to be updated.

Reg2view · May 12, 2013

X2 on you need a controller on the 13, but not the 11/12, different map, particularly at altitude, poo obviously leaned it out on the 13 as you go up. Give RKT a call and they'll fill you in.

hostile1 · May 13, 2013

Read this!

RKT said:
Hundreds of riders have well over 1000 miles at the lower elevations.. Whether or not they frequent SW is unknown..

The piston does not know what elevation it is running at. It functions exactly the same regardless of elevation.. The head, and the the head only dictates how "safe" this kit is at any elevation..

This kit is rock solid with no issues... As you can read (with all the different threads related to it), there are many happy people running this kit and we are confident this will continue for may seasons to come

Ok we'll I'm not trying to bash at all here like I have in the past, my 12' assault is ready to be refreshed and I was considering your kit because I rode 3 (200-3=197) sleds with your kit and loved them but......... After calling these guys to get a end of year update I was told the same story " it ran good for a couple hundred miles then they locked up???? Why????? This is no lie, every single rkt drop in kit I have known about in the state of alaska has blown up??????? I think this is a legitimate question so I am hoping you have a legitimate answer.

hostile1 · May 13, 2013

I will send you samples of fuel,oil,air, and snow if those will help!

RKT · May 13, 2013

hostile1 said:
Ok we'll I'm not trying to bash at all here like I have in the past, my 12' assault is ready to be refreshed and I was considering your kit because I rode 3 (200-3=197) sleds with your kit and loved them but......... After calling these guys to get a end of year update I was told the same story " it ran good for a couple hundred miles then they locked up???? Why????? This is no lie, every single rkt drop in kit I have known about in the state of alaska has blown up??????? I think this is a legitimate question so I am hoping you have a legitimate answer.

Legitimate... That is the real question.... right??

I have not heard from these people, that you have the names and numbers of?

I would expect ANYBODY who has had a problem to contact me with it, and this has not happened..

So, with all due respect, ALL I have are emails and phone calls that are very happy.. and have nobody contacting me with any BLOWN UP engines ..

So, I guess, we have different results...

Please feel free to have those people with the blown engines call me.. Again, I have not heard from anybody on this...

RKT · May 13, 2013

hostile1 said:
I will send you samples of fuel,oil,air, and snow if those will help!

This post really tells the story IMO..

roni87 · May 13, 2013

polarisperformance said:
I installed the drop-in kit in my SBA 2011 this winter. The sled was at 2500 miles stock engine and running very strong but low compresion on mag side. After the kit installed, the sled begin to bog when hiting the gas WOT. The problem was getting worse as i ride more. I was not able run WOT on long run as the RPM was dropping down slowly and end up with bogging . Finaly the engine seize on both side on the intake side of the piston with 400 miles on the kit. I dont know if the problem was the drop in kit or other problem that happen at the same time

Post #30 in this thread, might be worth getting ahold of him and help diagnose.

m8magicandmystery · May 13, 2013

hostile1 said:
a legitimate answer.

just a thought...in the Yukon there was thirty Chevron stations which later got sold to Shell (there is only 30 thousand people in the Yukon so Shell was the major supplier)

Then Shell sold all thirty stations and bulk plants to an Alaskan outfit with there own refinery supplier and called the new outfit in the Yukon "North of 60 petroleum"

I think at last count there was only three remaining gas stations and still bulk plants for aviation and mining.

But the publics refusal to support and use the retail fuel in vehicle and recreational needs killed a goliath of the industry in our terms...that may be where your answer is...

mtncat1 · May 18, 2013

roni87 said:
Post #30 in this thread, might be worth getting ahold of him and help diagnose.

i read that whole thread months ago,and it is a sure thing that when an engine is running poorly after a engine repair.and then holding it wide open. and as it runs worse and worse. it is a sure thing that it will blow up or seize.my guess would be it was assembled wrong or had another problem.just sayin probably not related to the dropin kit.

48janke · Jul 16, 2013

I have a 2013 800 with the drop in kit (14:1) compression along with a slp pipe, hps can, power commander with my own map. It runs amazing, huge difference over stock. I'm also running a 3" track I just need to get my clutching figured out now!(any suggestions) I had a Doo before my pro with Kelsey's kit in it an all his stuff flat out works very well!!

snobyrd · Aug 13, 2013

my question is, after installing the kit i observed the piston is a mill or so below the intake port, meaning there's probably 8* of of crank rotation doin nothing and also makes up for a shorter piston, i dont understand how this translates to better power and piston life, please explain this to me if anybody knows.
ive removed my kit and im goin bb, im not sure of a builder yet.
I had rpm issues all winter with this kit, rs would fall of to 7900 and than slowlly increase a little, i bought the tied as recommended , tried different pol weights and tried sec springs with advise from kelsey, tied and even vhonk and ill i had all winter was grief, i had moments of extra power but not many.
If your lookin for true noticeable power than in moho look at other ideas.
there was a small group of us on here pm ing each other with same results and trying to brain storm how to fix our rpm issues. If your looking to compeate with the cats power, this kit is defently not the kit.

Rk Tek Drop in kit RESULTS

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