repaired head gasket now no start - Ex-500.com - The home of the Kawasaki EX500 / Ninja 500R
 
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post #1 of 10 (permalink) Old 2-27-2017, 6:57 PM Thread Starter
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repaired head gasket now no start

So I lapped and assembled the head after the bike sat for about 2 months tops. I went to start after the rebuild and the bike would turn over but not start. I was able to get it to start with starting fluid, so I know it has spark. My next step was to clean the carbs but I thought I should ask the experts first (fog) well thoughts?
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post #2 of 10 (permalink) Old 2-27-2017, 7:15 PM
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Check to see if its getting fuel.

2006 Ninja500R Purchased new July 2006; 0 miles. Miles as of January 2020; 108,827 . It's a GO bike, not a SHOW bike.
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post #3 of 10 (permalink) Old 2-27-2017, 7:16 PM
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Sounds like a fuel metering (carbs) issue to me, but until the experts get here:

Did you check out your valves? Out of spec valve lash can cause a no start or hard start.

How are your plug boot caps and plug wires? Clean those caps and trim 1/4" off each end of the wire to refresh electrical connections, spark could be shorting to ground.

Last edited by melon rancher; 2-27-2017 at 7:19 PM.
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post #4 of 10 (permalink) Old 2-27-2017, 8:55 PM
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Yep, sounds an awful lot like it's not getting the correct amount of fuel. It doesn't take much sitting for these carbs to gum up from the ethanol in the fuel. I'd highly suggest rebuilding the carbs. @ducatiman rebuild kits are less than 50 bucks, carb soak is what, 20 bucks, so not expensive. Clean everything, ensure passages are clear, put it back together and try again.
Carb clean takes time to work, but if you've got an ultrasonic cleaner, the rebuild can be done in an afternoon.

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post #5 of 10 (permalink) Old 3-1-2017, 12:47 AM Thread Starter
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OK so I followed the write up in the wiki for carb cleaning put it back together and it won't start. got it started with starting fluid and let it warm up. Took off down the street and it died around the corner can't get it started
Suggestions?
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post #6 of 10 (permalink) Old 3-1-2017, 5:38 AM
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Have you confirmed that you are getting fuel to the carbs? Check the petcock for proper fuel flow. Do you have an inline fuel filter? Check the fuel line to see if there is a kink in it. Is the vacuum line to the petcock in good shape?

2006 Ninja500R Purchased new July 2006; 0 miles. Miles as of January 2020; 108,827 . It's a GO bike, not a SHOW bike.
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post #7 of 10 (permalink) Old 3-1-2017, 10:36 AM
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Fundamentals first, did you get the cams timed right?
If not you may have bent all your valves.

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post #8 of 10 (permalink) Old 3-1-2017, 12:40 PM
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My big question is.... once you actually get it started, does it run okay?

Now, to me it sounds like a fuel issue still... unless your valve lash is slightly out of spec which begins with hard starting... then will progress quickly to burnt valves.

Have you checked to confirm that the carb bowls actually have fuel in them? If you have some kind of inline fuel filter, are the lines too long preventing proper amount of flow?
Did you properly set the float heights?
Is the sync set?
What are your mix (pilot) screws set at?
Have you double checked that your carb to engine boots are seated properly?
Have you double checked your petcock to left carb vacuum line for leaks?
Have you double checked the PAIR valve to right side carb vacuum line for leaks? Or if PAIR system was removed, is the right carb's vac nipple capped off with a good cap?
Are we working with a STOCK set up with NO silly pod filters, jet kits, etc?

Cleaning or rebuilding a set of these carbs isn't hard at all but the steps and set up must be done properly or it isn't going to work.
Go back and check all of the above to be sure you didn't miss something simple.

O_E_M
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post #9 of 10 (permalink) Old 3-1-2017, 12:56 PM Thread Starter
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I'm a dummie I put the needle under the diaphragm through the holder instead of under it so I'm sure that had something to do with it. Cams are timed, valves in spec,pilot screws2.5 turns out still need to tune the mix, no mods, I'm not sure exactly about the float heights, my battery is dead now though....

Last edited by 07ninjarider89; 3-1-2017 at 1:07 PM.
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post #10 of 10 (permalink) Old 3-1-2017, 1:21 PM
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That'll do it.
ETA: It should be needle, white holder with legs pointed down, spring.

And so will a weak/failing battery.
The bike literally runs off the battery. Weak battery can't keep up with the ignition coil requirements.
Slow charge it for several hours... or over night.
Put a volt meter on it... should read at least 12.5 standing voltage after charging.
Leave meter on it and watch it as you start bike.
If voltage drops below 10.5 while under load (starting) then it's no good.

O_E_M

Last edited by one_evil_monkey; 3-1-2017 at 1:25 PM.
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