Washed 07 polini x3 50 and now wont start

[clemsontigz]

Man I just purchased a 07 polini for my son.. Ive raced all my life and im pretty polished when it comes to wrenching on bikes.. First off the guy that I bought the bike from was mixing the ration 60.1 I wanted to run 40.1 so I drained the gas and washed the bike up and put the tank back on an replaced with the proper fuel ratio and now the thing wont start.. I see that the spark plug is firing by the old placing the plug on the head trick.. I went and purchased a new spark plug and still nothing.. I removed the carb and cleaned and still nothing.. Im stuck scratching my head.. never had this problem before with the big bikes .. NEED SOME POiNTERS PLEASE

[la racing]

Check to see that you didnt get water in the air cleaner box. The two piece design will sometimes leave a opening and water will get in the carb. Also check ignition side cover to see if there is any moisture, I've never had a bike not start but sometimes they run like crap!!!

[la racing]

My bad I went back on your post and say you already cleaned carb.

[Quicksilver]

If you went from 60:1 to 40:1 you will need bigger jets...More oil = leaner.

Your pilot jet being to small will make it much harder to get started...Assuming the guy you bought it from had it jetted right @ the 60:1...

Do you have good compression?

Is the plug wet?

Is the spark seem to be a good strong spark?

Are you using the choke at all?

Where is your airscrew?