RKTek Drop in

[VOHK]

We have spent a substantial amount of time and effort trying to quantify real world power gains on naturally aspirated RMKs.

Driven largely by a genuine need to find a desirable compromise to boost, its been a somewhat frustrating venture.

Many kits we tested did indeed produce results, some with impressive gains in throttle response and midrange punch but fell flat on the big end, others just making noise, however when weighed against the dollar investment, most left us feeling slighted...

Though I have no question some of these indeed perform well at other altitudes as advertised, they just didn't show well with our use demand and altitude.

Various configurations of porting, heads, pipes, silencers, pistons (even cat pistons), clutching, timing, fuels and fuel controls have all been rendered down to one true stand out.

Though I can only speak to our test results, which are all done at 9500'-13000', the RKTek Drop in kit is with a doubt the best bang for the buck...

Our testing showed the 13 kit produced impressive gains in loose snow track speed, as well as significantly better throttle response and power across the spectrum.

Though this package does require a fuel control (13 model), it is very easy to tune, it is also very easy to clutch, and is rock solid consistent.

We will be doing follow up testing with different exhausts applied to this kit soon (preliminary testing shows great promise), and also a real world evaluation of the RKTek big bore for the RMK 800 as well.

Seldom does such a reasonable investment produce such a dynamic result.

Just thought it worthy of mention as many of you have inquired about such kits...







.

 

[gunnerthesnowman]

We have spent a substantial amount of time and effort trying to quantify real world power gains on naturally aspirated RMKs. Driven largely by a genuine need to find a desirable compromise to boost, its been a somewhat frustrating venture. Many kits we tested did indeed produce results, some with impressive gains in throttle response and midrange punch but fell flat on the big end, others just making noise, however when weighed against the dollar investment, most left us feeling slighted... Though I have no question some of these indeed perform well at other altitudes as advertised, they just didn't show well with our use demand and altitude. Various configurations of porting, heads, pipes, silencers, pistons (even cat pistons), clutching, timing, fuels and fuel controls have all been rendered down to one true stand out. Though I can only speak to our test results, which are all done at 9500'-13000', the RKTek Drop in kit is with a doubt the best bang for the buck... Our testing showed the 13 kit produced impressive gains in loose snow track speed, as well as significantly better throttle response and power across the spectrum. Though this package does require a fuel control (13 model), it is very easy to tune, it is also very easy to clutch, and is rock solid consistent. We will be doing follow up testing with different exhausts applied to this kit soon (preliminary testing shows great promise), and also a real world evaluation of the RKTek big bore for the RMK 800 as well. Seldom does such a reasonable investment produce such a dynamic result. Just thought it worthy of mention as many of you have inquired about such kits...

So , other then the RKTec drop in kit , what (whos) other kit did you test

 

[tinkerjohnson]

rkt drop in

i also want to put out some good feedback on this kit. i have the 13 pro with this setup and stock pipe. absolutely amazing to say the least very good power across the board, revs soo fast and pulls very hard and runns very smooth all the way threw from idle to full throttle, i ride 8,000 to 11000 aswell and yes the fuel controller is needed but is very easy to tune and works very well. i have just under 300 miles on mine now and it is by far the best bang for the buck i have come across and it really works on the mtn nothing but praise from everybody that rides my sled they love it and i am verry impressed with how well it performes in the real word. it runns better everytime i ride it A+ on this kit you will not be dissapointed

 

[tudizzle]

practically installs itself!

 

[Montgom345]

VOHK - pm'd you

 

[hostile1]

Sweet video man!

 

[TurboMatt]

Anyone have any experience using these pistons with boost? Wondering how and if they will for boost.

 

[dawgwood1978]

i also want to put out some good feedback on this kit. i have the 13 pro with this setup and stock pipe. absolutely amazing to say the least very good power across the board, revs soo fast and pulls very hard and runns very smooth all the way threw from idle to full throttle, i ride 8,000 to 11000 aswell and yes the fuel controller is needed but is very easy to tune and works very well. i have just under 300 miles on mine now and it is by far the best bang for the buck i have come across and it really works on the mtn nothing but praise from everybody that rides my sled they love it and i am verry impressed with how well it performes in the real word. it runns better everytime i ride it A+ on this kit you will not be dissapointed

Just wanna say love the handle man...

 

[INDEEP]

Without a doubt its more reliable than stock too. Way to go Rktek!

 

[edavis0202]

Before I had a mile on my 2013 I put in the RKT drop in kit and staked it with SLP Pipe/Can and PVC...AWESOME combination for performance and reliability.

Nice Job RKT!

 

[rmscustom]

Seems like all of Rkt's products offer a big bang for the buck. I always had good results with his AC stuff and I think my pro might need the 858 next year

 

[jhurkot]

So can a guy just use a PC5 with a map installed for this? I hate fuel boxes.

 

[edavis0202]

So can a guy just use a PC5 with a map installed for this? I hate fuel boxes.

Thats what I have, but also a pipe and can. not sure what map would use for just the drop in kit by itself

 

[tinkerjohnson]

fuel controller

So can a guy just use a PC5 with a map installed for this? I hate fuel boxes.

this new boondocker box is really easy to use. and i can give you some starting numbers (for the 13 anyways)

 

[boondocker163]

does the 2011 need the controller as well?

 

[frog]

Not to hijack or get off topic but has anyone measured their pistons that they removed and compared them to Kelsey's pistons and then measured the bore to compare celarance's and also to document how much the pol piston had worn (skirt collpase) in XXX amount of miles. A friend of mine (also a forum member) has a 12 with only a few hundred miles that will be installing Kelsey's kit and I am hoping to be able to measure everything before reasembly and was just looking for others findings to compare. I am wondering if there will be more of a spread in cyl measurements or piston measurements (differences in cyls and pistons between different sleds with similiar miles). Some last 4k miles and some are crappin the bed in 800-1000 miles. Thanks in advance and congrats to Kelsey for putting together a good option for us 800 pol guys.

 

[Jimb]

Just asking but how does new pistons same compression add power? Is it the side wall clearance deal? Or is it reliability guys are going for.

 

[mtncat1]

drop in kit piston is not a stock piston ,the dome height is lower that changes the porting.the piston is sold wit a different head to compensate for the lower dome height of the piston.installed the kit in my my11 pro and the h/p gain is very noticable

 

[edavis0202]

Not to hijack or get off topic but has anyone measured their pistons that they removed and compared them to Kelsey's pistons and then measured the bore to compare celarance's and also to document how much the pol piston had worn (skirt collpase) in XXX amount of miles. A friend of mine (also a forum member) has a 12 with only a few hundred miles that will be installing Kelsey's kit and I am hoping to be able to measure everything before reasembly and was just looking for others findings to compare. I am wondering if there will be more of a spread in cyl measurements or piston measurements (differences in cyls and pistons between different sleds with similiar miles). Some last 4k miles and some are crappin the bed in 800-1000 miles. Thanks in advance and congrats to Kelsey for putting together a good option for us 800 pol guys.

Measured my 2013:

Mag cylinder bore measured 3.3467, piston was 3.416
Mag side is 0.0051 piston to cylinder clearance

Stock piston measured 3.3404 piston to cylinder is 0.0063
Stock ring end gaps were 0.011 on top and 0.019 on bottom

Hope this helps

 

[frog]

Looking at the manual Pol recommends a .004-.0055 thou clearance and a 9 thou max limit. New they were our of spec.