Expertly crafted from premium materials Designed to match rigorous quality standards. Cylinder Head BUD RACING. Manufactured. 4. A stock YZ125 has a loose squish tolerance, which is . or 4 payments of $82.50 with Learn more. Cylinder Head. So if the bike cranks up easy and runs good, then what is the issue? Precision in design and engineering makes even the smallest details into a work of art. 2015 Yamaha YZ125. The combustion chamber shape results in a 2.1% volume increase that leads to a decrease in the compression ratio which will help with todays inconsistent gas from the pump. Use VHM standard insert: AE32100-E (YZ125 / XX125) AE32100-F (XE125) High-flow, . 2022 Yamaha YZ125 - Totalmotorcycle.com USA Specifications/Technical DetailsUS MSRP Price: $6899 USDCanada MSRP Price: $8199 CDNEurope/UK MSRP Price: 6749 GBP (On The Road inc 20% Vat) Engine Type 125cc liquid-cooled 2-stroke; reed-valve inducted. Perk up the performance of your Yamaha YZ with our tried and true head modification. Lectrons outflow comparably sized carburetors while delivering fuel in a more finely atomized form. A BikeMaster Compression Tester. The lower-compression head had a unique combustion chamber shape, to make the two-stroke more rideable. So I figure it must be a ring, I know the compression on these things is supposed to be about 97 psi. Cylinder temps will change as well. Select your bike in the following list Skip to the end of the images gallery . If it reads anywhere from 100 to 150 psi, your motor should run. Skip to the beginning of the images gallery . Adjustments include: spring preload, 20-way rebound damping, 20-way low-speed compression damping and 2 turns of high speed compression damping. Simi Valley, CA - 2,291 mi. The two piece design allows for interchangeable combustion chambers (domes) to suit the power characteristics of any riding style. When I say usable power, I mean that most riders can't use all the . The cylinder head design has been revised for 2006 to create a new combustion chamber shape that achieves a more complete burn at higher rpms. Yamaha YZ125 . If the head does not offer a performance increase over your stock head, we will refund your money!NO RISK! When the piston reaches the very top TDC the volume is now using 1 part of that 9.2. Performance Cylinder Head Yamaha YZ250. The same parts on a 250F cost a little more, but stock valves will cost an additional $300 and a cam chain is $25. 8 The Yamaha YZ125 is a great transition bike. Yamaha's jump from 46mm to 48mm is the single biggest improvement Yamaha made to the 2004 YZ125. Top End Gasket Kit - YZ 125 M810635 SKU: M810635 MPN: M810635 OEM Reference: M810635. Introducing the Ryan Villopoto spec Works Pipe, a pipe fitted for a multi-time champion that can now be bolted onto your YZ125. 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. VHM CDI Beta RR200 2T 2020 - 2022 / Beta RR200 2T Racing 2020 - 2022. To understand the need for high compression fuel, it's important to understand what a compression ratio is. They are specially developed for optimal power output during the whole race. In most cases you will only remove .010" to .040". It's manufactured from a high quality alloy and O-rings are used for the sealing. As low as $225.00 As low as $225.00 $225.00. A stock warrior runs 9.2:1. VHM 2005-2021 Yamaha YZ125 Cylinder Head and Insert $25699 Save $28 Insert Add to Cart Yamaha YZ125 Performance Cylinder Head VHM has been the world leader in Two Stroke performance heads since 1978. GYTR High Compression Piston Kit - B2W-E16A0-V0-00. I dont think the power will outweigh the headaches. In Stock. Customer Reviews . $330.00. This creates better throttle response and more horsepower, all while staying in tune throughout a wide range of . 20. But if you get a reading below 80psi, then your spidey senses need to kick in. Increasing compression is one of the easiest ways to gain power. So 9.2 nocompressed into 1 compressed. For example, let's say the cylinder volume is 100cc, and the combustion chamber (cylinder head) is 10cc, giving us a 100:10 ratio, or 10:1. . . The Pro Circuit Works RV Pipe is designed to be stronger on the bottom to the middle part of the powerband. Project Dirt Bikes . You could always high-comp the 150 later too. 101,200. Higher compression usually brings more power but other things have to be takin into consideration like ignition timing, fuel, and mostly reliabilty. View our Simi Valley Cycles location Look Now. This head suits the models listed below: YZ125 2005-2021 - See the listing for our 2022 model. The kit includes piston rings, piston pin, and clips (uses stock replacements). Would this be a bad coil. That's the stock head gasket thickness and composition. The MX dome greatly improves top end power . It is best suited to tight tracks with lots of jumps out of corners. 01388 720 800. The all-new YZ125-A featured a high tech motor and went head-to-head with Honda's new 125 CR125M Elsinore. The Apex Technical Innovations billet cylinder head offers a two piece design made of 6061 aluminum alloy. When the piston is at the very bottom BDC the cyliner volume is calculated as 9.2 parts. And the largest contributor to the new fork's prowess is the longer hydraulic bottoming cone . When I changed mine I used zip ties and had to go back and put hose clamps. . . This is extremely beneficial off the start or on tighter, softer tracks where acceleration out of corners is key. 1981YZ125. The Suzuki head gasket is a good gasket, and it might be easier to get that a Cometic. This head suits the models listed below: YZ125 2005-2021 - See the listing for our 2022 model. Closed-chamber cylinder heads have small combustion chamber volumes for high compression ratios, with even mildly domed pistons. Apr 23, 2020. By duggiedirtbiker, June 30, 2008 in Yamaha 2 Stroke. +39 0522 918811 - Fax +39 0522 919087. To increase the compression the kit uses a .012" thick base gasket to increase the compression and increase torque. If you order a Cometic, get the MLS (Multi-Layered Steel) gasket at 0.027" thick. So I put in the factory Athena kit with a machined head so it will work with the stroke. All gaskets made in the U.S.A. Im not familiar with porting but what got me interested is the following. High Compression: This design is slightly higher compression than the stock head but still safe for 98 RON pump fuel with appropriate jetting. The Platinum Pipe is a unique fusion of power, elegance and utility that pushes . The motor ran incredibly clean and pulled harder than stock across all rev ranges. The 2022 YZ125 features a plethora of updates, which include a 8 mm longer connecting rod, heavier crankshaft, increased flywheel weight, and redesigned power valve. . Pipe Description: The Platinum Pipe offers the same performance gains as the popular Works Pipe, but utilizes a platinum plating on the body to protect it from everyday elements. Vertex Pistons, Inc. Quantity. However, I do believe that low compression is very common, and that you can trust the compression tester. Spend about $40 for the gauge tester and do it yourself. Airsal Cylinder 250cc - Honda CRF250R CRF250X . The 150 will not be as hyper but will have more torque. Yamaha's tried-and-true YZ125 is a very capable machine in stock trim and doesn't need much to be an off-road bike. Cylinder OEM + gasket kit Athena - Yamaha WR450F YZF450 . New replacement cylinder head Includes cam caps and cam cap bolts $87.96 - $359.96 Cylinder Works Cylinder Head Kit (CH2005-K01) 0 # mpn4696806457 I was out riding (in mud) my 2005 Honda Rancher es350 2wd and it started smoking real bad, so I figured that either I got water in the engine or blew a ring so I parked it. YZ125 2005-06 Phathead Flat Top Kit. TPI Power Kit - suits 2020-2023 KTM 300TPI, Husky . 2022 Yamaha YZ125 Claimed Specifications. CarlinoJoeVideo High Speed - 2000 - European Models: 2 Turns: 2/3 Turns Out - All Other . The 2017-2020 250 Head is the SAME head except the head stay is different and will not mount up in the 08-16 . Overall Score. Go to page 2 for the Feb 26th update on this YZ and porting. TSP Billet Head - Yamaha YZ125 2005-2021 & YZ125X 2020-2022 $ 399.95. 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. YZ125 (X) Billet Cylinder Head Kit - 1 dome (2005-2022 YZ125 & 2020-2022 YZ125X) from 240.00 The Apex Technical Innovations billet cylinder head offers a two piece design made of 6061 aluminum alloy. We take today's high-winding four-stroke MX and off-road engines for granted simply because they have been in the mainstream for nearly 15 years. Clean points and gap them right. I would do a compression test of the engine. Details . Remove the head then measure the solder with a micrometer. Engine should be at operating temperature, remove all spark plugs, disable ignition by grounding the high tension cable from coil to distributor, screw in the gauge to one cylinder, hold the gas pedal to the floor-or hold the throttle at wide open, then crank engine for about 5 seconds. . YZ125, YZ125X. CU125. The GYTR High Compression Piston Kit provides a performance boost throughout the RPM range while maintaining a high level of durability. The short answer is that the high compression 125 will feel pipey and require more aggression. gaskets and o-rings Rear Suspension Specifications For Your 1997-2001 Yamaha YZ125 - Rear Suspension Service Specifications, Torque Specifications. Simi Valley Cycles Video chat with this dealer. And who cares if the tester is off by 10psi, it wouldn't matter. Im interested to try some porting on my 2009 YZ125. VHM has been the world leader in Two Stroke performance heads since 1978. The kit includes piston rings, piston pin, and clips (uses stock replacements). If you have a young rider graduating from 85s, the 125 is actually a great choice because he already knows how to keep a two-stroke singing. Manufactured from. 85.5/100. It offers improved bottom/mid power over the Mid/High design and is best . The 2022 Yamaha YZ125 has less unsprung weight in . NOTE: As of April 2020, we will not have the 2008-2016 KTM/HUSKY 250 BILLET Head. Add to Wish List. 4.8 out of 5 stars. "Best bolt-on mod on the market.". I do not know the how much it is stroked but the guy I bought . This is done with correcting the squish clearance between the top of the piston and the head. 9 The Yamaha YZ125 can be rebuilt for $100that's the price of a piston, ring and gaskets. Today's thumpers are amazing examples of modern . away. Ive just finished converting a mates KX85 to a 100 (its his sons bike) He had a ported KX 100 cylinder and modified head . Followers 0. Boyesen CC-32AB Black 'Factory Racing' Clutch Cover. 3964291 1969-70 396/402 375 L-78, . WE WILL OFFER A MONEY-BACK GUARANTEE . Total Adjustment Positions: Stock Adjuster Position: . Has a battery in it so im using eletric start. The proliferation of modern four-strokes has changed the dirtbike world in a profound yet very subtle fashion. In that time many World, National and Regional Championship Titles have been won in Motocross, Kart and Road Racing. VHM Cylinder head Yamaha YZ125 2005-2020. These Heads will come anodized in Non Anodized or Black. Cost-effective way to raise compression without expensive high-compression pistons or cylinder head work. The Yamaha YZ125 was a single cylinder, two-stroke Trial motorcycle produced by Yamaha between 1997 and 2019. 68.95 . Wet compression test is putting a small amount ( 1/2 teaspoon) of oil into the cylinder and the do the compression test. . 311.95 . Be the first to answer Apr 05, 2022 Motorcycles. A stock YZ125 pipe is still a good choice if you want to save money. The MX dome greatly improves top end power and over-rev at the expense of some low end. Simi Valley Cycles Video chat with this dealer. Brought it home and drained the oil.. no water. Description YAMAHA YZ 250 2 STROKE PERFORMANCE. Cylinder Works Cylinder Head - Honda CRF250R . 2 offers from $91.99. 2 offers from $25.00. | Quote Braaapin' aint easy. 4.1 out of 5 stars. BUD RACING cylinder heads are delivered with one insert, it allows you to change . Machined valve pockets provide additional valve clearance when used with higher lift camshafts. Recommended Posts. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Via T. Tasso, 1 - 42023 Cadelbosco Sopra (RE) - Italy. Medium Compression: This design offers a similar compression ratio to the stock head, but with a much better design. YZ125 Billet Cylinder Head Kit - 2 dome (2001-2004 YZ125) from 315.00. SKU. YF12505. The CDI gets digital settings to . Found that if i put the coil wire to the head it sparks a little and then when you put a spark plug in it dose nothing. IMoose Racing high-compression top end gasket, o-ring, and seal required to rebuild a top end; valve seals, head, base, exhaust, tensioner, and other misc. 71. Pics too come.. Email 1-805-232-5792. A high-level overview of which applications can benefit from increased compression ratio can be helpful when assessing whether a high-compression upgrade is a good choice for your machine. More engine power Better heat transference - Kit includes: GYTR Cylinder Head, GYTR High Compression Piston, GYTR Air Flow Kit, Application specific, pre-programmed Vortex ECU, . YZ125X 2020-2022 (current) Choose your desired compression ratio from the drop down list. 3. This head offers performance gains UNMATCHED by ANY other bolt on.. You will NOT be disappointed! I'd vote for the 150 kit unless you are doing it inexpensively. . 2021 Yamaha YZ125, Has 134 w/long rod, high compression head,1 hour on new motor by Frenchie, C12 or T2 Race gas only, financing avail. The Yamaha YZ125 is the ultimate adventurer being ready to tackle everything you throw at him without too much fuss. Machined valve pockets provide additional valve clearance when used with higher lift camshafts. This first generation YZ, while quite an improvement over its more sedate (and less costly) MX125 cousin, was not quite up to unseating the mighty CR125M. It was a blast to ride and I attribute all of this to the Apex Technical Innovations head. Front: single disc. Tel. Medium Compression: This design offers a similar compression ratio to the stock head, but with a much better design. 29000 Save $ -40 Add to Cart Fitment: 2005-2022 YZ125 / 2020-2022 YZ125X The SX/XC dome gives a big midrange boost with more power everywhere on the front side of the power curve. GYTR YZ125 High Performance Kit - B4XHIPERKT22 GYTR cylinder head with removable insert; V-Force air intake with carbon reed valves; 2 GYTR pistons kits with circlips, rings and piston pins; GYTR heavy rotorGYTR exhaust pipe; . I can't recommend this. 2001 YZ125 2005 RM125 2006 KFX400 . Thats 9.2 to 1. 9.0/10. This modification is a great enhancer to all of your performance up grades or as a stand alone mod. Order within . This Phathead Flat Top kit fits Yamaha YZ125 2005-06. The head features special designed water duct for optimal water flow. Squish clearance is tighter than stock and . Posted June 30, 2008. . MZS Pivot Levers Clutch Brake Adjustment CNC Blue Compatible with YZ125 YZ250 YZ426F YZ450F 2001-2007 | YZ250F 2001-2006. hydraulic. Yamaha YZ 125 2stroke 2017 High spec mx bike Very quick 125 Only 21 genuine hours Zeta lowing link Low seat Pro circuit front pipe Pro circuit ti-2 titanium carbon shorty end can . Hi, compression ratios work as fractions. Free Shipping over $89 (U.S. Orders Only) SHIPS FAST. Pics too come.. Email 1-805-232-5792. Phathead Racing's Flat Top kits include a Wiseco GP series 762 racers choice flat top piston kit and a Phathead set with domes designed to be used with these high performance flat top pistons. Simi Valley, CA - 891 mi. A good (new) head gasket is a must with high compression. Apex then tuned the compression ratios, squish areas, and msv's of each head profile to match the type of riding they're intended for. Add to Cart. Color. 1994-2001 Yamaha . Squish clearance is tighter than stock and the design is much more detonation resistant than the stock head. Fitment: 1999+ YZ250 / YZ250X. The Stock YZ 250 head is a VERY inefficient design and leaves A LOT of Performance on the table. Description Fitment 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. Yamaha gives the 2020 YZ125X a new cylinder head. Bore x Stroke: 54. . Select options. The GYTR 1SL (2014-2016 YZ450F) High Compression Piston Kit provides a performance boost throughout the RPM range while maintaining a high level of durability. Started by rebuilding carb and check to see if it had spark and dont. 30-006-56 : 2006 on YZ125 Lowering Link - 15mm. 382.95 . YZ125 New top end high compression. With some necessary protection upgrades like a skid plate and handguards along with an oversized tank, the YZ is ready to rip the . The world famous golden VHM head with exchangeable combustion chamber is specially developed for optimal power output during the whole race and has an improved water duct. It will not be as powerful as a stock 150. The SX dome gives a big midrange boost with more power everywhere on the front side of the power curve. Heat is the enemy of especially 2 stroke engines, as the race goes on and the engine gets hotter, the power drops off. Its lightweight (209 lb wet), compact dimensions and sleek . duggiedirtbiker. Surface the head to remove enough material to bring this clearance closer or to a minimum of .020" Be sure not to remove too much material or the compression will be too high and could cause engine damage. 1994-2001 Yamaha YZ125 - Carburetor Specifications. It gives much more bottom/mid power than stock, plus higher peak power. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Compression Ratio 8.2~10.1:1. S3 Head Inserts High Compression Red - KTM 300EXC Husqvarna TE300 Husaberg TE300 . Its purpose is a plusher ride, more resistance to bottoming, and more precise damping action. HIGH COMPRESSION: This new design is roughly the same compression ratio as the stock YZ250 head but with a much better design. The two piece design allows for interchangeable combustion chambers (domes) to suit the power characteristics of any riding style. Re: Is 120 and 125 psi compression ok? A stock YZ 125 pipe won't put out high peak horsepower numbers with a 144 kit, but you'll have a lot of usable power. With just a few add-ons, our YZ125X is a potent off-road race bike without breaking the bank. You do need to have the cylinder measured. At the time, Yamaha offered a YGT (Yamaha Genuine Tuning) kit, which had a ported cylinder, a high-compression head, a carb, a pipe and a new ignition that allowed you to get rid of the battery and starter. Share More sharing options. away. Max torque was 17.7 ft/lbs (24.0 Nm) @ 10000 RPM. When ready, open the throttle, press the start button and watch the compressor gauge. Lectron Fuel Systems has two generations of 2-stroke carbs: the 38 H-Series cast carb and the newer Billetron 38 made out of billet. HOME; AUTO RACING ; SHOP; RESTORATIONS COMPLETED; 2 STROKE RACE ENGINES; SUSPENSION SERVICES; RE-BUILD COST'S; 4 STROKE RACE ENGINES; ENGINE /PARTS COATINGS; Be sure all your fuel lines are tight. 2006 Yamaha YZ125. Since increasing the compression ratio increases power and heat output, applications that benefit from the additional power and can cope with additional heat . This eventually morphed into the Yamaha 125MX. Rear: single disc. 07-18-2010, 12:33 AM #7. 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. Rear Shock Absorber Compression And Rebound Adjustment. It is best suited to tight tracks with lots of jumps out of corners. NOTE: RK TEK IS 100% CONFIDENT IN THE PERFORMANCE OF THESE 250cc HEADS! $19.95. You reading should be higher than the dry test. The Apex YZ125 head is designed to have a nominal squish clearance of .035" which gives a great mix of reliability, safety, and performance. There's now a leaf spring in the mid-speed valve. Yamaha YZ125 2013, Stock Complete Cylinder Kit by Athena. hydraulic. Check the owner's manual of your bike for ideal engine pressure but generally speaking a healthy 250cc 2-stroke engine shows compression ranges from 170 to 240 psi and all other engine sizes between 120 and 190. Yamaha YZ125: review, history, specs. 18-01-2011, 10:48 PM. Paying for race gas sucks as well at $5 a gallon. This is a new one for me. It's also good to keep low-end and mid-range power, which is great for trail riding. $75.00 = Standard YZ Head Mod $85.00 = YZ 250-X Head Mod Plus Shipping and Handling Shipping and Handling; $18.00 alone, or $5.00 when shipped with carb mod. YZ125 2022 CYLINDER HEAD B4X-11111-00 Machined to Ngage racing exact specifications to ensure max power throughout the rev range. MSRP: $6,899 (Team Yamaha Blue)/$7,099 (Monster Energy Yamaha Racing Edition) Engine: 125cc, liquid-cooled, two-stroke single-cylinder. Fresco 2T lite series silencer fmf fatty pipe VHM high compression race cylinder head Acerbis Hand guards Pro taper profile adjustable clutch lever and per Year . Ships Today. 2. $783.86. Bore x Stroke 54.0mm x 54.5mm. Low power out put at your elevation? That includes the o-ring on the water/fuel seperator bowl. Any air leaks will cause the fuel system to not have good vacuum. Our golden aftermarket VHM billet cylinder heads with exchangeable combustion chambers are well-known all around the 2 stroke race world. 2021 Yamaha YZ125, Has 134 w/long rod, high compression head,1 hour on new motor by Frenchie, C12 or T2 Race gas only, financing avail. An aftermarket cylinder head will give you more torque and better throttle response, as well as make jetting easier.

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