Question about Honda Xr 250 Motorcycles

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It's a 1986 xr 250. Found 2 bent intake valves. Replaced valves,timing chain, Rings, Its getting spark, over 150lbs of compression, but won't start. Have tried pull starting, kicking. doesn't even try to start.

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Im not being a smart ==== but do you have fire and fuel sounds like its in time or you would not have compression

Posted on Feb 11, 2010

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I have klr 250 timing issue, what can I do?


Hi Dave:
I just bought my first KLR yesterday and a service manual came with it.
Check the milage on yours??????
Really ony 2,200? That's barely broken in and amazing for a '94.
The hiss from the airbox would indicate a bad intake valve or at least that I would be checking compression to start trying to figure it out.

Sep 05, 2015 | kawasaki KLR 250 Motorcycles

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Timing chains and actuator replaced, now i have a code PO2279


P2279 is the code for Air Intake System Leak. Smoke checks are ok, but hard to see in places like the underside of the intake manifold. SInce your compression is good and even, chances are that the problem is at the intake manifold gasket.

Sep 21, 2014 | Cars & Trucks

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1988 XR 250r smoking and blowing oil out tailpipe, compression 120, cylinder walls in great shape, what should I look for?


The compression is low. This indicates bad piston rings. The cylinder may look okay but chances are the cylinder wall has low spots. I suggest you have the shop bore the cylinder and install a first oversize piston and rings. Since the head is already off, I would re-seat the valves and install new valve guide seals. With proper compression the bike will be noticeably stronger.

Aug 19, 2011 | 1987 Honda XR 250 R

1 Answer

I have a 93 honda accord, the timing belt slipped so i had to replace it i set the cam top to top and the crank to top also set the balance shafts. car still will not start, when i try to crank it it trys...


the valves are bent if you lost the timing belt you need to do a compression test. the low cylinder needs a leakage test to see where it is losing compression you can get each cylinder on compression stroke and put air pressure in the spark plug hole and listen to the exhaust pipe if you hear it hissing the exhaust valve is bent for that cylinder if you hear through the throttle body the intake is bent on that cylinder if you hear it in the valve cover with the oil cap off then the rings are leaking

Dec 08, 2010 | 1992 Honda Accord

1 Answer

1985 XR 200 ALL TIMING MARKS SEEM TO BE RIGHT, HAS FUEL ,HAS SPARK .BUT WILL NOT START


By "all timing marks seem to be right", are you talking about the timing marks on the alternator rotor or the camshaft timing marks? A 1985 model is a pretty old bike. If it has never had a timing chain or the adjuster guides replaced, you may need to address this issue. Not only do you need for the ignition timing to be correct, you need the camshaft timing to be correct as well.

In your problem line, you stated that you had fuel, and spark. You need three things to get any engine to run, fuel, spark, and compression. Do a compression check on the engine. If the compression is low, it won't start either. Three things can cause low compression. Bad rings, improper camshaft timing, and valves not seating properly.

If you want to get the bike running again, I would suggest you do a "top end job" on the engine. Pull the head and cylinder. Measure the cylinder for wear and bore for a new piston if necessary. Replace the rings. Have a valve job done on the head at a local machine shop. When you put it back together, do so using a new timing chain and adjuster slides. You'll be surprised at what a "New" engine feels like. Good Luck!

Jan 31, 2010 | Honda XR 200 Motorcycles

2 Answers

97 XR 250. AFTER RUNNING FOR A LITTLE TIME THE CRANKCASE OVERFLOW STARTS FLOWING(OIL). IF IT WERE RINGS WOULDNT IT START LEAKING IN THE BEGINING AS WELL.


No, because it may take some time for the oil to heat up and expand. Then, once this happens, the oil can begin to get whipped up by coming in contact with moving engine and transmission parts. Oil foaming can occur and over-run the crankcase ventilation system.

To help eliminate this problem, be sure to use the correct oil as recommended in the Honda owner's manual. Do not overfill the crankcase with oil. Change the oil and filter more frequently - especially after riding through deep water crossings.

If you suspect worn piston rings, check the spark plug for oil contamination and perform a cylinder compression and leak-down check.

Oct 28, 2009 | 1997 Honda XR 250 R

1 Answer

Replaced head. Now can't get engine timed


i just rebuilt my 22r you have to make sure the chain is set on the timing gears properly also when you put the distributer in you have to find tdc on the #1 cylinder on the compression stroke. the piston travels and the valves open and close after the exhaust valve opens and closes the intake valve will open as the piston travels down when it closes the piston will travel back up compresing the fuel when the dot on the crank lines up with the mark on the timing cover that is tdc top dead center on the compresion stroke. once you have that yoo slide in th distributor so as the rotor points at the number one contact on the cap

Oct 24, 2009 | 1986 Toyota Pickup 4WD

1 Answer

How do u remove timing chain and re-time engine (1984 xr 250 r)


If you need to remove the cylinder head, here's how. To remove the cam chain, you've got to also remove the left crankcase cover and flywheel.

First, you need to turn the engine over until the piston is at top dead center (TDC) of the compression stroke. Begin by removing the two round covers from the left side of the crankcase cover. Also remove the four tappet hole covers from the cylinder head cover. Turn the engine (in the normal direction of rotation) and watch the intake valves open - and close, then see that the exhaust valves open, then close. Now align the 'T' on the flywheel with the notch in the inspection hole. With all of the valves closed, the engine is at TDC of the compression stroke. Do not begin removal of the cylinder head cover until this is done - to avoid damage to the cover.

With the cylinder head cover removed, you will find two bolts attaching the cam chain sprocket to the camshaft. Turn the engine until you can get a 10mm socet onto the heads of the bolts and remove them. The sprocket will come loose and slide down onto the camshaft, enabling you to remove it an the camshaft.

Upon reassembly, set the cam timing by first setting the engine at TDC. Then, align the two marks on the cam sprocket with the gasket surface on the cylinder head. With the engine at TDC and the marks lined up, the cam timing is properly set.

Before calling the job done, make sure to adjust the tappet clearances to .002" on the intake and .003" on the exhaust valves.

Oct 24, 2009 | 1985 Honda XR 250 R

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