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1999 kAWASAKI LS 650 - Is compression reading of 90 psi to low.

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Yes, it is too low. The minimum normal compression is 125psi. The range is from 125psi to 150psi.

Posted on Feb 01, 2010

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What should idle psi and 2500-3000 rpm psi with a warm engine be.

compression pressure is read at cranking speed with throttle wide open. For petrol engine it is 155-165 psi hot dry with an allowed variation of no more than 10% between adjacent cylinders and around 175 psi hot wet (OIl injected to seal rings)
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There is no compression reading done at rpms as it is meaningless

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With the decompressor active, nominal is 85 - 90 psi. At 62 psi, you have a top end problem. Try dumping a bit of oil in the cylinder and re-test. If the pressure rises, you have a ring seal problem. That sounds like an top end rebuild.

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1987 Suzuki LS 650 Savage specifications and pictures
The 1987 Suzuki LS 650 Savage and all other motorcycles made since 1970. Specifications. ... Chassis, suspension, brakes and wheels. Front tyre: 100/90-19.

Apr 14, 2014 | 1987 Suzuki LS 650 Savage

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Looking at a bed edger and the compression is 90 psi is this something that i should worry about.

The Honda 8HP motor will work OK with 90 psi compression but it's on the lower end of good. Most likely it will need new piston rings and possibly the cylinder resurfaced in the near future. Low compression could also be caused by valves not seating completely either from wear or carbon buildup. Depending on what you are looking to spend it may be worth your while to remove or have removed the head to inspect the valves and cylinder wall.

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I have a 99 sienna and the cylinders have low pressure what can i do?

If cylinder compression is too low, the car may not even start because of it. Have a shop do a compression test or a leak-down test to check the internal health of your engine. A good engine should have pressures of 150-200 psi in all cylinders and be close to each other. A worn or high mileage engine may have pressure as low as, say 125 psi, but if still balanced (close readings), would still run decent. Compression below that, especially below 100 psi, is serious trouble. ignition spark refuses to ignite the air/fuel mixture and you get a misfire-a non-working cylinder. Low compression can be caused by worn piiston rings or poor valve sealing. Low compression in 1 or 2 cylinders can be a valve problem, burned valves or valves not seating properly.
A leak-down test will check each cylinder and if there is a problem, the test will find the cause of the problem.

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1 Answer

98 honda accord v6 only has 90 psi compression

90 psi compression is the minumun for gas engine to ignite, you have low compression what is the compression next to it? The compression on Honda V6 is 200psi. you can have a valve problem a blown head gasket, Also make sure your compression gauge is accurate by using another compression gauge

Mar 23, 2012 | 1998 Honda Accord

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What should a 98 dodge 5.2 compression be. Its in a 1500 Ram if that makes a difference.


Jul 05, 2011 | 1999 Dodge Ram

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I want to ask wath pressure i put into the tayre of kawasaki kle500 front 90/90 vr21 rear 130/80 vr17

Hi there,

THere's a KPA or PSI reading embossed on the tire.. you should follow that. Or as a general rule 31 PSI front 30 PSI back for a stiff ride. 28 psi rear 29 psi front will give you most cushion at tacky road-to-tire friction.

Hope this helps

Dec 28, 2010 | 1995 kawasaki KLE 500

1 Answer

What is the compression for a suzuki ls 650 savage

Hi Jrrrolds, has to have at least 90 PSI and I am sorry you can't find the first and best tool you ever bought for your Suzuki but despair not for a mere $15.00 you can download another one. For more information about your issue, please visit the websites below. Good luck and have a nice day.
1999 Suzuki Motorcycle Service Repair Workshop Manuals

May 18, 2010 | 1999 Suzuki LS 650 Savage

1 Answer

What should the compression be for a 1983 GS650GT, I have readings of 160 psi on three cylinders and 180 psi the other, I'm going to redo the check again with a different compression tester.

Taking compression test:- the bike's engine should be at normal running temperature and also tht the throttle should be in fully open position.
Your bike's engine has a compression ratio of 9:4:1
here is a guide frm compression ratio to psi :-
8>1 = 102.9 psi
8.5>1= 102.9 - 110.25 psi
9>1= 110.25 - 117.6 psi
9.5>1= 117.6 - 124.95 psi
10>1= 124.95 - 132.65 psi
10.5>1= 132.3 - 139.65 psi
11>1= 139.65 - 147 psi
11.5>1= 147 - 154.35 psi
12>1= 154.35 - 161.7 psi
Hope this helps!

Dec 27, 2009 | 1982 Suzuki GS 650 GT

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