cb750 compression test fitting|SOHC compression advice please : exporters You can do a leak down test to find the cause of the compression leak in No. 4. Search "leak down test" on this site for instructions on how to do this test. The "PFFFT" sound .
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I did a compression test today so I'll know before opening the engine. I'll deck cyl and head that will crank up the compression a little. Interesting to see how much more .CB750 points plates Toyo, Hitachi, Nippon Denso, Futaba. Started by 69cb750. 20 .
I will probably cut the axle short, reusing CB750 axle will give me the same axle .Normal Topic Hot Topic (More than 15 replies) Very Hot Topic (More than 25 .
So I just completed a complete rebuild of my '75 SOHC. New pistons .050" over, good quality gaskets, Viton valve seals, stock cam. Head was professionally rebuilt and a . You can do a leak down test to find the cause of the compression leak in No. 4. Search "leak down test" on this site for instructions on how to do this test. The "PFFFT" sound . I just bought a 79 CB750L and found out that the compression is low in all cylinders. 1, 2, and 4 were at 60, 3 was 90. Bikes turns well but will not. How To Compression Test Motorcycle Engine | Honda CB750 Resto Project Bike | Part 13In this episode, I compression test my Honda CB750 project bike. I have .
Many (not all) 750s are 9:1 compression ratio, leaving a combustion chamber volume of 20.44cc. Adding a test apparatus volume of 11.5cc yields 31.95cc total volume, .
Well it's been a while since I messed with my project, finally got my 12mm adapter for the compression tester. since I don't have the throttle cables hooked.
In this exciting video, I will be showcasing the powerful Honda CB750F motorcycle as I conduct a compression test on its remarkable en.To check if low compression is caused by bad rings or a leaking valve, put about a tablespoon of oil in the cylinder you're about to test. If the compression improves, the oil is helping bad rings . I've just completed a compression test. The engine has new pistons, rings, valves, valve guides, bearings and the head was shaved by 0.06mm by an engineering co. I've . I did run a compression test, but could only use a press-in fitting (the srew-in adapter was obviously leaking). Came up with all cylinders around 160-165 PSI. I didn't write the figures down, I saw that compression was .
1979 CB750 Compression Test. Recently bought this bike (old barn bike and hasn’t been on the road in a few years). Ran a compression test, below are the results. What is my best course of action? Cylinder 1- 135 psi Cylinder 2- 90 psi Cylinder 3- 120 psi Cylinder 4- 135 psi Compression test. Thread starter 80hondaf; Start date Jul 17, 2016; Tags dohc engine 8. 80hondaf CB750 Member. Messages 24 Reaction score 1 Points 1 Location Rome, Pa. Jul 17, 2016 #1 . CB750 Guru. Messages 3,476 Reaction score 54 Points 36 Location Fort Worth TX. Jul 18, 2016 #2 I'm new to the CB750 world and purchased a 81 DOHC CB750F with 31k miles about two weeks ago for 0 with a clean title. I previously finished up building a Ryca Motors bobber based off a 96 Suzuki Savage LS50. . I ran a compression test with out the carbs on and bypassing all the electrical and jumped it from the starter hooked up to my . 1. COMPRESION TOO HIGH? I've just completed a compression test. The engine has new pistons, rings, valves, valve guides, bearings and the head was shaved by 0.06mm by an engineering co. I've reassembled using standard block and head gaskets. I've oiled up the engine and oil pressure is good. On doing the compression test my readings are: No1 220psi
CB750 Member. Messages 29 Reaction score 0 Points 1 Location Washington. . The original engine also came with the bike and the compression test on it was good so I’m 50/50 on it actually being an 836. . That can be true of course and why one goes about decking things to get that compression back up, as well as fitting better pistons that . my 1970 honda has not run since 1982,so i started to give the bike a compression test,and the 2 outside cylinders were 50 lbs on one side and 100 on the other side.After taking the tappet covers off on the inside cylinders I discovered the nut and tappet are missing on the intake valve on cylinder 3.i assume the motor needs pulled Don't trust the provided harbor junk % gauge. Now Im using the junk 2.0 tool, calculated leakage is 8.3%, 5% so far. The guy who did the review also said the meter was extremely inconsistent and yielded leakage of 30-45% and once he eliminated the factory gauge, he was able to use more pressure, and measured leakage of around 10 % with all the leakage .
Went back and did a second test (cold and no carbs) and got better numbers: cyl 1 - 130 cyl 2 - 123 cyl 3 - 111 cyl 4 - 130 I'll try the oil test on cyl 3 this evening. u/ncstatecamp - I will check and see if the quick connect fitting on my compression tester fits my air hose, if so I will try the air compressor test you suggested. CB750 Member. Messages 23 Reaction score 0 Points 1 Location Tampa. Oct 15, 2017 #4 Hello, . but they seem to not fit correctly. That could be one issue, I will compression test first, get the bike back together, and check for the vacuum leaks.The Honda CB750 is an air-cooled, transverse, in-line-four-cylinder-engine motorcycle made by Honda over several generations for year models 1969–2008 with an upright, or standard, riding posture.It is often called the original Universal Japanese Motorcycle (UJM) and also is regarded as the first motorcycle to be called a "superbike". [6] [7] [4] [8]The CR750 is the associated .
1. To do a compression test (yes, yes I know I should have done that sooner). Is it a good sign that there is at least average compression though if the bike starts? 2. Check/adjust the float height, pilot jet, and primary and second main jets for size and cleanliness. 3. Check/adjust the cam chain before attempting to start the bike. 4. Hey there lads, I was trying to perform a compression test but noticed that my tester loses compression fast, so I figured my litle screw in did not perform well, long story short i noticed I have a damaged thread in cilinder one. I have no idea how , because before the compression test I was.
SOHC compression advice please
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CB750 Guru. Messages 3,476 Reaction score 54 Points 36 Location Fort Worth TX. Dec 30, 2020 . they lend toward low compression on the twin cam engines. Reply. Reactions: Rampton. O. oldchuffer CB750 Member. Messages 6 Reaction score 1 . Do you think I should do a leak down test to verify everything inside the cylinder? Just trying to find .
barn find 25ys sitting semi inside. he said he got it from his uncle who found it in his friends barn.motor turns freely but he had not had time to mess with it ..bike only has 12,000 miles on it. i got it home and took out of bike . Topic: need info on doing a compression test on cb750 (engine out of frame) . fitting the carbs and airbox is a breeze when motor is out of the frame. Logged past-cb100,ts250,cb500,cb500,gs1000,gs650g.phillips traveller present-CB 650 retro VTR1000F3 .
Low Compression CB750
CB750 Member. Messages 21 Reaction score 8 Points 3 Location 411 Surf Rd Melbourne Beach FL 32951. Dec 25, 2019 . Can I go to NAPA buy off the shelf ignition wire and cut them to fit? Is it 7mm wire? . Compression test is .
How To Compression Test Motorcycle Engine
CB750 Member. Messages 19 Reaction score 0 Points 1 Location UK. Jul 21, 2017 #2 . Meaning you need a compression test right off the bat or likely wasting a lot of time and money. Reply. N. nigxl CB750 Member. Messages 19 Reaction score 0 . I did find press in idle jets in the carb kit but didn't fit them for fear of damaging the carb . When the compression nut is tightened, the ferrule is forced into contact with the fitting body and the piping. The pressure results in the ferrule deforming slightly, conforming to the shape of the piping and the fitting, which ensures a tight and secure seal that prevents fluid or gas from leaking. In this video i talk about uses and how to use compression fittings for plumbing applications. My name is Tony, I have been a master plumber for over 30 year.Cycle World Road Test Honda Cb750 August 1 1969. Honda Cb750 August 1 1969. View Article Pages. Cycle World Road Test. . -bore touring engine. Honda considers the reduced head size of an sohc engine to be of greater advantage, as it may fit more compactly into the frame. There is also the consideration of a dohc engine’s greater weight; the .
CB750 Addict. Messages 423 Reaction score 56 Points 28 Location Sunny Central Florida. Mar 13, 2016 . But, it being abandoned so long I'm not even half sure a compression test is valid. That's why I was asking opinions. Reply. amc49 CB750 Guru. Messages 3,476 Reaction score 54 Points 36 Location Fort Worth TX. Mar 14, 2016
Compression test results. How screwed am I? : r/HondaCB
The compression test I ran the other day gave these numbers (from left to right, sitting on the bike) - 125, 150, 145, 150 . CB750 Enthusiast. Messages 32 Reaction score 0 Points 6 Location Oliver BC. Nov 24, 2016 #4 Strange you should mention that about the #2 exhaust clearance. The leak down test uses oil because it won't go past the rings easily (if at all). Fuel and air will, or would. If the compression tester you have shows better numbers with oil than fuel, that is an indication you have bad rings. But you can't use too . The top 2 rings are too thick to fit in the groove. I have been searching the interweb but the best I can come up with is RIK rings for the '75-'77 Super Sport. . Tried CycleX, Service Honda, and Vintage CB750. Reply. dirtdigger Moderator. Staff member. Top Contributor. Messages 3,812 Reaction score 304 Points 83 Location US. Jun 21, 2014 #2 .
CB750 Guru. Top Contributor. Messages 1,277 Reaction score 514 Points 113 Location Florida. Oct 28, 2023 . Was the compression test before or after doing the valve adjustment? Maybe you should reinvestigate the valve adjustment and compression? . So I was starting to sync the carbs and I was using the old set as a gauge of what to use to .Choose from our selection of quick-install pressure test fittings, pressure test fittings, deep-reach hex nut expansion plugs, and more. In stock and ready to ship.
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cb750 compression test fitting|SOHC compression advice please