2004 kx250f no start

[jermss]

Brand new piston and rings installed exactly as manual shows, new gaskets,timing chain, head was shipped to engine dynamics and repaired cam journal and shimmed it. New plug, fresh gas.its getting fuel & spark, no start. Timing should be dead on.

[Sam-Bellamy]

Looking through the hole for the timing there is two lines which it needs to be in the middle of but I am in uk so may be different,

[kawisrok]

Have compression?

[jermss]

My service manual shows flywheel to be lined up with the case on the 2nd timing mark not inbetween the two. which i have verified is tdc using a long rod. Due to it having the decompression valve i havent checked compression with head installed.

[jermss]

Just did a compression test and im only getting a few pounds to register after 5 kicks open throttle.

[jermss]

I did a compression test without cams installed and it was 43lbs. I did a leak down test and set at a 100lbs air is constantly leaking through the carb so the intake valves are not seating properly. This was all supposed to be fixed and tested by engine dynamics in California. I heard great things on here about them but no so sure now

[kawisrok]

I did a compression test without cams installed and it was 43lbs. I did a leak down test and set at a 100lbs air is constantly leaking through the carb so the intake valves are not seating properly. This was all supposed to be fixed and tested by engine dynamics in California. I heard great things on here about them but no so sure now

 Well maybe before blaming the machine work done, are you sure you have the correct shims installed? You CANNOT install the original shims after machine works been done. If those are good then maybe they didn't grind the valves in correctly or the valves are hanging up.

Edited December 21, 2014 by kawisrok

[jermss]

I paid them to shim it, i paid them to fix one of the bolt holes for the exhaust and they didnt fix it. This is after they shipped my head to somebody in Missouri and i got his head in michigan.

[jermss]

I wasn't quick to blame anyone. I tested compression without cams installed as well as with, so shims wouldn't be an issue

[kawisrok]

 Sorry, my post wasn't meant to be negative but now that I re-read it, it does sound that way. Considering the compression went up once you pulled the cams, I'd say you for sure have something going on with incorrect valve height

[jermss]

Im was assuming the decompression valve had to do with such a big difference in the compression without cams installed. Im going to call engine dynamics tomorrow and hopefully be shipping it back to them.

[jermss]

Just talked to engine dynamics, for the mix up he is having me ship my head back to them and they are going to give it a valve job, fix the exhaust bolt hole, shim it, and replace any needed parts for free! Cant ask for better customer service than that!!

[jermss]

Bike wouldnt start due to intake came gear being spun on camshaft. It was about 3 teeth off. New intake hot cam was the fix

[jermss]

Engine dynamics had my assembled head twice and failed to notice this when doing their complete inspection/rebuild.