By YZX120, August 13 in Yamaha 2 Stroke. Back to top: Advanced Search. The RK Tek (www.2strokeheads.com) $1950 big bore kit consists of boring the stock cylinders out from 85mm to 91.5mm and fitting them with proprietary tight-fitting forged pistons. When you have a narrow power-band (stock head) the higher gears are not very usable because the engine will not supply the needed torque at the lower RPM. Performance Cylinder Head Yamaha YZ250. RK Tek Inc is your premier 2 Stroke Performance Shop.. ALL we do is 2 Stroke Engines! RK Tek have developed a true performance enhancer with this billet head designed specifically for mountains and single/dual track riding, sea level to 10,000ft. Discussion in '2st' started by hawaii-rider, Nov 16, 2018. hawaii-rider Husqvarna AA Class. When you have a narrow power-band (stock head) the higher gears are not very usable because the engine will not supply the needed torque at the lower RPM. RK Tek sets itself apart from other performance shops by testing its products in the best lab in the world - the great outdoors. YAMAHA YZ 250 and 250 X Billet Heads (1999-Present). This head is unequaled in its performance. We have the experience to make a hed that offers SIGNIFICANT performance enhancements WITH-OUT the need for any ECU changes. IF you feel you want to add a fuel controller, we have Power Commander Maps for the engine that we supply free of charge. YZ250. The Stock 250 & 300 head (especially 2014 and newer) is a VERY inefficient design and leaves, ANOTHER HUGE bonus with the addition of the head is. RK Tek is located in Preston, Idaho and is owned and operated by Kelsey and Rex (hence RK). 2 were here. We have been working with Fuel Injected 2 Stroke Engines for decades!! With this confidence increases as well. Cooling is also increased. NOTE: RK TEK IS 100% CONFIDENT IN THE PERFORMANCE OF THESE 250cc HEADS! 1992-1998 Head body 1999-2010 Head body. Head milling is more than just raising the compression, it's a way to help your engine breath and burn more of the air/fuel mixture and help cool the piston. The Stock 250 head  is a VERY inefficient design and leaves A LOT of Performance on the table. Yes, that's right, RK Tek draws results from "real world" testing, 1245 Industrial Park Rd.Preston, ID  83263 Phone: 208-852-3221, Copyright © 2017 RK Tek - All Rights ReservedCreated by Mountain West Web Design. VHM has been the world leader in Two Stroke performance heads since 1978. Register | Login. This head offers performance gains UNMATCHED by ANY other bolt on.. You will NOT be disappointed! Yes, that's right, RK Tek draws results from "real world" testing. Share Remove Report: Sale 1782970717. Now who doesn't need that??? None of the other aftermarket or custom heads come close, no matter what they say on their YouTube videos about them. This head will widen the engine’s effective power-band considerably and allow for a much more linear power delivery. Sections of this page. MEDIUM COMPRESSION: Similar compression ratio to the YZ250X model, but a much better design. Gives … Porting Packages are also available. Condition is "Used". See more of RK Tek on Facebook. What MAY not be clear is that the dyno run with the RK Tek Head was started at a much higher RPM (3500 vs 2500 RPM). NO RISK! or. Almost all will find they are faster and in more control when running the higher gears. Pulse Modehighlights creatures and other survivors around the wearer in a specific color to show the relationship to the wearer. Achetez en toute sécurité et au meilleur prix sur eBay, la livraison est rapide. If you have any questionscall us anytime we're here to help. Here is a RK TeK head I tried out on my YZ. There are yet no reviews for this product. The 2017-2020 250 Head is the SAME head except the head stay is different and will not mount up in the 08-16 frame. If you are ordering cheater heads, we will need to have your OEM heads to make the modifications. Shipping cost cannot be calculated. What you would normally pull in 2nd gear you can now pull in 3rd gear. You can be assured the power with the RK Tek Head is MUCH greater than ANY other bolt-on part you can purchase, ESPECIALLY at the lower RPM.. MX Head MSRP $325 2008-2016. A cooler running engine will last longer and produce more power. The cylinders are CNC ported and a billet cylinder head is included which utilizes RK Tek’s patented (or patent pending?) This head is unequaled in its performance. Were going to take a look at the RK Tek head for my 2009 KTM 300XCW. Yamaha YZ250 parts. high turbulence, textured squish bands. Create New Account. Accessibility Help. These Heads will come anodized in Orange or Black. Yes, that's right, RK Tek draws results from "real world" testing, 1245 Industrial Park Rd.Preston, ID  83263 Phone: 208-852-3221, Copyright © 2017 RK Tek - All Rights ReservedCreated by Mountain West Web Design. TE/TC RK Tek Head - 2018 TC250. He added the head and is not super happy! Recommended Posts. If the head does not offer a performance increase over your stock head, we will refund your money! 2 were here. 0 to 2000 elevation. There’re the only KTM head with a patented design and the other guys wish they had a head … Just getting the proper squish band configuration without going overboard on compression will give you great results. or. Information is taken at the time of order and the chamber is designed for YOUR engine and application. This head will widen the engine’s effective power-band considerably and allow for a much more linear power delivery. In that time many World, National and Regional Championship Titles have been won in Motocross, Kart and Road Racing. ANOTHER HUGE bonus with the addition of the head is improved fuel economy! Email or Phone: Password: Forgot account? Visitez eBay pour une grande sélection de stickers yamaha yz 250. Porting Packages are also available. This is ,usually, the result of the higher gear running. Page 1 of 1: JLA FORUMS | Classifieds | FOR SALE - Arizona | FOR SALE - Phoenix, AZ. It simply is not true! Sign Up. What you would normally pull in 2nd gear you can now pull in 3rd gear. YB5 Head Brackets 1992-1998 YB1 Head Brackets 1999-2001 YB2 Head Brackets 2002-2010. We have been working with Fuel Injected 2 Stroke Engines for decades!! NOTE: Your TPI bike does NOT require ANY ECU changes in order to work VERY well with our TPI Heads. We have developed a TRUE Performance Enhancer with this Custom Billet Head designed specifically for mountains and single/dual  track riding. RK Tek Head KTM 250. YAMAHA YZ 250 and 250 X Billet Heads (1999-Present) $325.00 The Stock 250 head is a VERY inefficient design and leaves A LOT of Performance on the table. With this confidence increases as well. Tribe members and creatures are highlighted in a green color, neutral players in white and enemies in a red color. After the head install, the torque is produced at a. All times are GMT - 5 Hours: Similar Topics (2000) Phillips Mod Truss Head #8 x 1/2 Self-Drilling Tek Screws $25. This is the reason wht the chart shows no power below 3500 RPM. The Stock 250 head  is a VERY inefficient design and leaves, ANOTHER HUGE bonus with the addition of the head is. And it’s also caught the attention of a whole new generation of younger racers who just want to get out there and ride. This head will widen the engine’s effective power-band considerably and allow for a much more linear power delivery. It is clear the added torque the head provides. YZ250 Kit includes 1 head body, 2 domes, 1 o-ring kit 6 copper washers Head brackets. NOTE: As of April 2020, we will not have the 2008-2016 KTM/HUSKY 250 BILLET Head. The helmet can scan through walls in a small radius around the wearer. Now who doesn't need that??? The higher gear running allows for faster overall speeds and less fatigue on the riders part because the rider does not have to "work" as hard to keep traction. This is ,usually, the result of the higher gear running. We have the experience to make a hed that offers SIGNIFICANT performance enhancements WITH-OUT the need for any ECU changes. NOTE: The Below dyno chart is from one of our customers. See more of RK Tek on Facebook. Head KTM Tek RK Sponsored Link. Seller assumes all responsibility for this listing. Your TPI bike does NOT require ANY ECU changes in order to work VERY well with our TPI Heads. Press alt + / to open this menu. Power wheelies … This head will widen the engine's effective power-band considerably and allow for a much more linear power delivery. Prev; 1; 2; 3; Next; Page 3 of 3 . RK Tek KTM Head. MANY questions can be answered there. If the traction was there you couldn't keep the front end down when the power came on. Period. Your TPI engine will run just fine with the RK Tek Head. Log In. RK Tek sets itself apart from other performance shops by testing its products in the best lab in the world - the great outdoors. Not Now. This item will ship to United States, but the seller has not specified shipping options. So, you are forced to ride in the lower gears in order to maintain any torque. RK Tek have developed a true performance enhancer with this billet head designed specifically for mountains and single/dual track riding, sea level to 10,000ft. We have developed a TRUE Performance Enhancer with this Custom Billet Head designed specifically for mountains and single/dual  track riding. RK TEK IS 100% CONFIDENT IN THE PERFORMANCE OF THESE 250cc  HEADS! Cooling is also increased. Order your kit from parts listed below. ANOTHER HUGE bonus with the addition of the head is improved fuel economy! IF you feel you want to add a fuel controller, we have Power Commander Maps for the engine that we supply free of charge. Compared to … 2 were here in orange, gold, and black Tek ’ s effective power-band and... There are you great results clear the added torque the head is ALL RPM of modifications. Pulse Modehighlights creatures and other survivors around the wearer Tek also builds one of a kind custom CNC parts... Oem o-rings OS5 o-ring kit 1999-2010 same as OEM o-rings OS5 o-ring kit 1992-1998 same as OEM o-rings VERY single-shock... ( compared to … 2 were here please check out this awesome video from DIRT bike regarding. Specified shipping options any torque | Classifieds | for SALE - Arizona | for SALE Phoenix... 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