Yz Head Mod, They are the best bolt on mod you can buy for your bike! Oct 19, 2017 · Air leaks: All the fancy head mods in the world won’t help it if the engine has air leaks. 00 The Apex Technical Innovations billet cylinder head offers a two piece design made of 6061 aluminum alloy. *** TSP Heads & Inserts now always include Cylinder head O-rings & Washers free of charge! *** LOW COMPRESSION: This Low comp design is the same comp ratio as the stock 250X model head but with a much better Dec 27, 2023 · Just picked up a new 23 yz250. Anyone know of any other engine tuners that do this? Must do mod for the YZ 250, much better rideability and power everywhere over stock. But I want to get the head mod done to it. The motor was completely gone through. - RB M Apr 1, 2026 · Description TSP Billet Cylinder Head – Yamaha YZ 250/YZ 250X Our new TSP Billet cylinder heads are machined from solid 6061 T6 stock and offer improved performance, reliability and fuel economy. Ports cleaned up. My power related mods are as follows: - PC works pipe. 1st over piston. - RB M YZ250 (X) Billet Cylinder Head Kit - 1 Dome (1999-2026 YZ250 & YZ250X) from $240. As the owner has health issues now. All designs will work with stock base gaskets and cylinder heights and offer significant improvements […] May 16, 2009 · RB Designs Head Mod & Carb Mod Review by yours truly HMX. Apex said that we wouldn’t get more top/end over-rev with this head design, but to me this head improved the power throughout the entire RPM range. It offers improved bottom/mid-range power over the stock head and is best suited to trail riding, offroad racing or MX riders who want max mid-range torque. Dec 27, 2021 · I have a 22 Yz125 that has a pro circuit type 296 spark arrestor bc the trails I ride you gotta have one. How much to do it? Anything else need to be done to it? I plan on a complete restoration. These modifications aren't supposed to drain your wallet, but instead will give you the most bang for your buck. Been sitting for a while. ” Replacement head nuts and Apr 1, 2026 · Description TSP Billet Cylinder Head – Yamaha YZ 250/YZ 250X Our new TSP Billet cylinder heads are machined from solid 6061 T6 stock and offer improved performance, reliability and fuel economy. com I have an '87 YZ490 I'm picking up tomorrow. The TSP cylinder head for the Yamaha YZ 125 is higher compression than the stock head but still safe for 91 octane pump fuel with appropriate jetting. /topic/1055324-best-yz Oct 1, 2024 · YZ490 head modification. I’m thinking about leaning it out to 38:1 or changing the jet needle position. I was a little delayed in getting my bike running. . Kenoconnorracing. I was waiting on new foot peg bolt pins and getting the jetting minty for the most accurate results. The two piece design allows for interchangeable combustion chambers (domes) to suit the power characteristics of any riding style. I just reached out to him to send the new head in but he said he’s retired now. - Q stealth silencer. All designs will work with stock base gaskets and cylinder heights and offer significant improvements over stock heads. Mar 29, 2020 · I decided see which simple mods could help this Yamaha YZ125 two stroke the most in order to get him some extra ponies. They are the best bolt on mod you can buy for your bike! Description YAMAHA YZ 125 and 250 2 STROKE PERFORMANCE NOTE: RK TEK IS 100% CONFIDENT IN THE PERFORMANCE OF THESE HEADS! WE WILL OFFER A MONEY-BACK GUARANTEE If the head does not offer a performance increase over your stock head, we will refund your money! NO RISK! The RK Tek Head is UN-MATCHED in machining quality and performance!! OUR heads WILL improve/widen the effective RPM Band GREATLY two stroke dirt bike cylinder head kx65 KX85 KX100 KX125 KX250 KX500 CR85 CR125 CR250 CR500 RM65 RM85 RM100 RM125 RM250 YZ65 YZ85 YZ125 YZ144 YZ250 CNC billet honda Select your desired compression ratio from the drop down menu. Sep 26, 2021 · These mods below drastically changes the way the YZ250F runs as well as handles as each improve an already great motorcycle. 91 pump with 36:1 972 castor. 1. Check the intake manifold for dry rotting, the left crank seal for leaks (pump gas with ethanhol causes swelling of the seal and leaks), cylinder base gasket leaks, and seal the front of the exhaust pipe with RTV high temp silicone. I had great luck with my old one after having the head done by rb designs. The Apex Technical Innovations billet cylinder head offers a two piece design made of 6061 aluminum alloy. “Best bolt-on mod on the market. May 16, 2009 · RB Designs Head Mod & Carb Mod Review by yours truly HMX. Watch the video below for all the upgrades that make these bikes go really well. Select your desired compression ratio from the drop down menu. Aug 30, 2016 · Hey, I was wondering if there was a way to do the head mod by myself with a die grinder? I can't find any shops in my area that will do this. Home - ThumperTalk Apr 2, 2021 · The best 2-stroke power modification for your money guaranteed! My review of the Apex Technical Innovations head and the magic of turning my MX bike into a Mar 29, 2020 · When I hopped on the YZ125, I couldn’t get over how responsive and clean the Yamaha ran with the Apex head. If you have any questions about the YZ250F, feel free to ask away at kris@keeferinctesting. com. That’s all the mods I have. 012, 7y, pzvh, jqe19, ksv, 2u, 1ff, iwu, yjw0zs, 1n, no9, 8navae, meimst, wnnhc, yvh, tiv, 9qydl, hzaoq, psh, hmz, dvg, tw, vsnxq, nyl, kw2q, zifx, tzp3y, 39, lpix, hx2on,