yz125 compression tester|YZ125 compression testing. : wholesalers OK, i have had my 02 Yz 125 for about 3-4 months now (moved up from honda 230) and i just got back from a trip to WV and im doing some basic maint. on the bike (dump gear oil, clean air filter, new rear tube and tire, brake fluid) and last night while i had the bike apart i decided to do a compression test, and i tested it 3 times and always got a reading of 105-110 .
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I'm looking for the "safe psi range" for both the 2012 YZ125 and 2012 YZ250 compression. I'd like to base my rebuilds on how the compression reads if that's a smart . Yamaha Motorcycles. Yamaha 2 Stroke. Good Cylinder compression tester? Gregk20. Posted January 13, 2013. I bought a 2000 yz 125 and it needs a little work. I have . Even with the much-improved six-speed transmission we still tested different rear sprockets on the 2005 YZ125, but unlike in years past, Yamaha shipped the 2005 YZ125 with good gearing. 2022 YZ 125 Introduction. By Matt Mattoon and Jimmy Lewis. . 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 .
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 should be around 120 PSI for a good result. . Every type of compression tester comes with a slightly different adapter. Mine came with two, the short one gives 175 psi, the long .
OK, i have had my 02 Yz 125 for about 3-4 months now (moved up from honda 230) and i just got back from a trip to WV and im doing some basic maint. on the bike (dump gear oil, clean air filter, new rear tube and tire, brake fluid) and last night while i had the bike apart i decided to do a compression test, and i tested it 3 times and always got a reading of 105-110 . 01 YZ125 65 psi Compression Test & Piston Wear (Pic Heavy) Facebook; Twitter; Youtube; Instagram; Pinterest; Newsletter; 01 YZ125 65 psi Compression Test & Piston Wear (Pic Heavy) By eric-cartman, May 18, 2012 in Yamaha 2 Stroke. Share More sharing options. Followers 0. Recommended Posts. eric-cartman.
KAYABA SSS SHOCK SETTINGS For hardcore racing, we ran this setup on the 2018 Yamaha YZ125 (stock clickers are in parentheses): Spring rate: 4.7 kg/mm Race sag: 100mm (105mm) Hi-compression: 1-1/2 . Problem is with your comments is that the specific subject of "compression feels ok" is subject to one's opinion. What I have found over the years of reading countless "my bike doesn't run good, compression feels good" type posts, is that when that individual actually puts a real compression guage to use, he finds out that his "good" compression actually tested at . 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. Hi. I have a concern and a few questions regarding my piston and cylinder in my 2006 YZ125. Here it goes. Ok so i bought this bike off a friend about 2.5-3 months ago as my first dirt bike. . I have also ordered a compression tester to see what the compression is. Any words of advice or insight are appreciated. Thanks! Link to comment Share .
YZ125 compression testing.
The compression has been reduced to 8.8:1 compared to 10.7:1 on the YZ125 motocross head. Yamaha achieved this in a novel way, raising the spark plug 3mm in the head, using the same casting but .There are two ways to look at the 2022 Yamaha YZ125. Two-stroke fans will be ecstatic that Yamaha is showing new commitment in their world. A major Japanese manufacturer opened its corporate wallet to design a new two-stroke motor and make substantial changes to the bodywork, brakes and suspension.99 YZ 125 low compression, but piston and ring fine . . You can’t trust a compression tester until you have tested it on a bike known to have good compression to get a baseline. I have a shitty amazon tester and have never read over 130 in it, even after a fresh top end. Try your tester on a buddy’s freshish 2 stroke and see if it reads .
A compression test will not always tell you if it is still good. A 125 only has 1 ring you can still make compression, but with only 1 ring the piston can start to lean over and scratch the cylinder. . I dont know what the manual says on the yz 125. That bike was never designed to have a long top end life. That was way down on the list of . 2015: The YZ125 was upgraded to the “arrow” design plastic of the Yamaha four-strokes (and that included a new airbox). 2016: A gold chain, black rims and BNG were added in 2016. 2017: The . Hey guys, I just did a compression test on my bike. I did the test as per the compression test kit instructions (about 5 good kick's to the engine), and i came out around 115 PSI. I don't have a shop manual so i'm not sure if i'm in the ballpark of having good compression. . As an example my YZ125 sees 20 hours of recreational MX track usage . I'm purchasing a leftover 06 125 for MX. I notice the Yamaha specs for the 06 YZ125 indicate that the compression ratio is 8.6:1 - 11.0:1. That is a broad range. I would like to know specifically from the factory is it 8.6:1, 11.0:1, or somewhere in between? I would think there is a baseline. Tha.
YZ 125 Compression test; By Bill_B, March 2, 2018 in Yamaha 2 Stroke. Share More sharing options. Followers 0. Recommended Posts. Bill_B. Posted March 2, 2018. Bill_B. Members; 1.9k Location: California; Share; .
yz125 low compression Facebook; Twitter; Youtube; Instagram; Pinterest; Newsletter; yz125 low compression. By steamroller11, May 5, 2014 in Yamaha 2 Stroke. Share . So do I need a new top end or does the cylinder need to be honed? I am going to borrow a compression tester tomorrow and get some numbers. .
So I noticed its, really easy to kick start the bike. I'm not sure if this is normal because this is my first two stroke. Any help would be useful. 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.
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I bought a 2000 yz 125 and it needs a little work. I have got it to crank a few times but can be very hard to start. I've checked the spark plug and it is not fouled and is sparking great. I want to get a compression test so I can check compression on my own does anyone know of a cheap reliable compression test for my bike? Thanks! a healthy late model YZ125 engine should get about 180psi. Then, taking some comparative readings a few times during the season, when compression drops below 160psi consider it's time to refresh the top end. Always using the same compression tester also takes out some variables.2025 YZ125 SPECIFICATIONS. ENGINE. Engine Type: 125cc liquid-cooled 2-stroke; reed-valve inducted Bore x Stroke: 54.0mm x 54.5mm Compression Ratio: 8.2~10.1:1 Fuel Delivery: Hitachi Astemo® Keihin PWK38S carburetor Transmission: Constant-mesh 6-speed; multiplate wet clutch Final Drive: Chain Fuel Capacity:
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We test the new 2022 Yamaha YZ125 at Glen Helen Raceway and leave the track with an ear-to-ear grin after riding the heavily updated small-bore two-stroke. . 2022 Yamaha YZ125 First Ride Review. Spark, fuel, compression. You have spark so take some of your premix and put a thimble full into the top end by way of the spark plug hole. If it pops more than likely the carb is gummed up, if it still doesn't try to start its probably loss of compression, another way to check compression without a compression tester is remove the spark plug (reinsert it into the plug . 2001 YZ125 No Compression Where to start? Facebook; Twitter; Youtube; Instagram; Pinterest; Newsletter; 2001 YZ125 No Compression Where to start? By Raptor123r, October 26, 2014 in Yamaha 2 Stroke. Share . I'd pull the cylinder, with no compression a tester is kind of useless.
The motor is also in a more aggressive state of tune, between a larger exhaust port, different power valve timing and a higher compression head. Under it all is a traditional design with a Keihin carburetor and a mechanical power valve. Check out our test of the bike on the trails around Glen Helen Raceway with Sean Lipanovich behind the bars.
YZ125 and YZ250 Compression Testing
Good Cylinder compression tester?
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yz125 compression tester|YZ125 compression testing.