2003 yamaha yz125 compression test|Compression PSI on 2001 yz125 : traders My stock 2005 yz125 after breaking read 165-166psi. I don't think it matters much but I don't think you need to disconect the carb. Just hold the throttle open and the kill button . Open World - STEAMUNLOCKED » Free Steam Games Pre .
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I have had a lot of people ask me how to do a compression test so I decided to make you a video explaining step by step.
I'm using a compression gauge that has a ten inch flex hose, so it could increase the total volume of the combustion chamber and lower the reading. However, it has a valve in .
How to do a compression test on a YZ125. This procedure will also work on other carbureted 2 stroke dirt bikes, but check your service manual for correct co. My stock 2005 yz125 after breaking read 165-166psi. I don't think it matters much but I don't think you need to disconect the carb. Just hold the throttle open and the kill button . If you are doing a leakdown test where you plug the intake and exhaust you pressurize to about 6 psi. It should hold for a few minutes. A loss of 1 or more psi in a minute .
Wet compression test is putting a small amount ( 1/2 teaspoon) of oil into the cylinder and the do the compression test. You reading should be higher than the dry test. . Do a compression test after breaking them in so you have an idea of what it should be. Use that number as a comparison to values as you put hours on the motor. I . I checked my compression on my YZ 125, 145 PSI. I just bought the bike, and me and my father are going over the whole bike. My repair book said that the compression . Just to let you know, my 2001 YZ125 has almost always had approximately 180 psi, so I think you are right in the ballpark. I have tested it with two compression guages and .
what is the compression in a 02 yz125?
The latest incumbent to grace our idle hands is the '03 Yamaha YZ125. This little filly caused a ruckus by narrowly winning the infamous Dirt Rider 125cc two-stroke shootout in . YZ125 (2003 & 2005) No Spark Jump to Latest 23K views 21 replies 4 participants last post by Junior Jul 31, 2009 Yamaha YZ 125 - Test Ride & Review - Dirt Rider. By editorial staff. April 9, 2009. More Tests. Tests. How Much Power Does the 2025 Husqvarna TC 150 Make? Tests.
Yamaha YZ125 Compression Test
For hardcore racing, we ran this setup on the 2022 Yamaha YZ125 (stock clickers are in parentheses): Spring rate: 48 N/mm Race sag: 100mm Hi-compression: 1-1/2 turns out Lo-compression: 12 clicks . KAYABA SSS SHOCK SETTINGS For hardcore racing, we ran this setup on the 2019 Yamaha YZ125 (stock clickers are in parentheses): Spring rate: 4.7 kg/mm Race sag: 100mm (105mm) Hi-compression: 1-1/2 .
2004 Yamaha YZ125 - First Test & Review - Dirt Rider. By editorial staff. February 24, 2009. Yamaha is fierce when it comes to keeping blue in the black. Although its four-strokes have attracted . Does any one know how many PSI the compression is supposed to be at on an 06 yz 125? I have a compression tester and need to know. Jump to content. Yamaha 2 Stroke; Activity. . The best way to know for sure is to do a comp. test on a fresh, broken in top end. . Yamaha 2 Stroke ; yz 125 compression? Theme . Light Mode (Default) Dark Mode .
But i came across a compression tester on ebay for like 20 dollars, and after opening the box i imediatly regretted the purchase. So i thought i would go give it a test, and i knew that a 250 should have around 240 psi compression, this stupid thing only reads 125 psi. Is it even possible to have compression that low and have the bike still run? 2022 YZ 125 Introduction. By Matt Mattoon and Jimmy Lewis. Photos By Trevor Hunter . This is the biggest revision the YZ125 has seen since 2005 and the introduction of the aluminum frame. Yamaha has been making a YZ125 since— well, likely before you were born. In your history, 2005 was the last major revision with an aluminum frame. Leak down test is irrelevant on a 2t because a compression test is going to give you a pretty good idea of the state of health of the rings. A leak down would only tell you if your head gasket is OK. Well I just purchased a compression test kit just for checking the top end at different meter hours.
Yamaha YZ125 (steel frame, telescopic fork) (Europe, North America) 1988 Yamaha YZ125 . 2003 All markets Name: Yamaha YZ125 Code: YZ125R, 5UN1, 5UN2, 5UN3, 5UN4 2004 All markets . Compression ratio 8.6~10.7:1 8.2~10.1:1 - . Corey Neuer/5'11"/165 lb/IntermediateI spent a lot of time switching between the 2004 YZ250F and the 2004 YZ125, mainly because the YZ125 felt so light and easy to maneuver—and this is even more .We understand both views. The fact remains, however, that riding the 2022 Yamaha YZ 125 is the most fun you can have on two wheels. You can’t possibly dislike the bike, no matter who you are and what you ride. Most things about the 2022 Yamaha YZ125 have changed, except the fact that it’s the best-handling dirt bike in the world.
Yamaha 2 Stroke ; YZ85 compression Facebook; Twitter; Youtube; Instagram; Pinterest; Newsletter; YZ85 compression. By 03rkjc, February 23, 2014 in Yamaha 2 Stroke. Share . Now we know you have compression but if your having issues with the bike you can have a air leak. A leak down tester will tell you that.In 2005 the YZ125 received a major change to the aluminum frame but beyond that Yamaha has only made minimal changes to this model. Fortunately, for all you 125 fans, Yamaha has finally rejuvenated the YZ125 for 2015. The little YZ’s new bodywork is attacking and modern. Low compression will only efect ease of starting and low end power, btw. It will still run perfectly at high RPMs. You did the right thing to get a gauge and measure it so now you know for sure the top end needs work.
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Small bikes can provide big fun, and the best way to test this truth is to ride the 2002 YZ125. A brawny 124cc liquid-cooled 2-stroke engine delivers more punch than you'd expect, and manual 5 .
Yamaha’s goal was to return to the “mini-250” engines that made the YZ125 the class leader from 1996 to 2001 (and the best 125 two-stroke in 2002-2003). They aimed for equal parts of low . The comp test isnt a good one for judging when to change a piston.A better bet is to log the number of hours on the piston/ring.A hard rider should look at changing the ring every 5 hours-this is because the YZ has a very large exhaust port and can go through rings quicker than the other brands with smaller ports.A slower rider could extend this to maybe 12hours but i .The Yamaha YZ125 is a motorcycle model that was released in 2003. It is a lightweight and versatile off-road bike designed for motocross and cross-country racing. The YZ125 is powered by a 124cc two-stroke engine, which provides quick acceleration and high performance.
This test of the 2001 Yamaha YZ250 is from the December 2000 issue of MXA. . Lo-compression: 8 clicks Rebound: 11 clicks Notes: Yamaha’s high-speed compression clicker (the large dial) is very .
2004 YZ 125 New cylinder, new wiseco piston to match. . New Weisco Piston and ring , never started. 175psi. 2003 YZ125. Not all compression testers are the same though and there are many factors, tester seal good and bore has slight coating with 2 stroke oil on assembly etc. . Put a teaspoon of 2 stroke oil down the plug hole and turn the .TSP Billet Cylinder Head - Yamaha YZ 125 - 2005 - 2021 - High Compression TSP Billet Cylinder Head - Yamaha YZX 125 - 2020 - 2023 - High Compression +1 408 459-8794. . 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. It offers improved bottom .
AUG 27–2003 YAMAHA YZ450F–SPECIAL TEST: All-new, faster than ever, but still a YZF. . However, the high-compression (12.5:1 vs. the CRF’s 11.5:1) motor has much more compression braking, and we stalled it a few times when chopping the throttle over jumps. Also, the four-speed is going to limit versatility for off-roaders and .
When doing the compression test & you're flailing on the kickstarter (or gently depressing the happy button ), the ignition system is still producing all of the voltage nessasary to create a spark. This voltage would like somewhere to go & if it can't jump a gap outside it may try to find somewhere inside to do this. 2003 YZ 125 Suspension setup I just bought a new 2003 YZ 125. The bike was setup at the dealer and I want to know what changes should I make so that the bike rides better. I am 180-183 lbs without motocross gear so I assume it would be 190 Lbs. I need to know if I should change the fork.
My brother just purchased a very clean '04. Did a compression test on it yesterday and it only read 70 psi. We checked it cold and did not pull the de-compression lever. Other than that the bike runs good and starts easy. It pulls good (not as much as my '03 CR250r two-stroke, but better than I thought a 250f would). A stock YZ125 has a loose squish tolerance, which is simply due to Yamaha manufacturing it on the “safe” side. Too little clearance will require race gas or engine failure. The VHM and Phathead are the most popular aftermarket cylinder heads for 2 strokes. They both offer a variety of combustion chamber inserts for differing compression ratios.
Yamaha YZ 125
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2003 yamaha yz125 compression test|Compression PSI on 2001 yz125