Fuel vacuum issues, please help

[super50zx]

t

[super50zx]

f

[super50zx]

pipe

[super50zx]

carb

[super50zx]

carb top

[zombie]

Glad to see you got posting Picts. down. I personally HATE posting Picts. It takes forever to get them done.

It is all OEM stuff. The gasket has been replaced at some point but that is a non issue.

Can you try to start it w/ the pipe removed, and the air box re-installed?

Even tho the piston is relatively carbon free it may still be a clogged pipe. That will prevent any vacuum at the intake, and give you high compression readings. Also try another compression test w/ the pipe removed.

See what happens

[super50zx]

thanks I will do that, probably wont be until next week mid week. I will let you know what happens and the readings

[zombie]

 

[super50zx]

okay finally got back home, did a compression test with the exhaust removed and I still was getting 140-150 psi, blew air through the exhaust pipe and it traveled well without any blockage from what I could tell. I am ready to do the leak down test.....two questions, can the leak down test be done with the motor still on the bike?  and the big question.....how would I go about taking you up on your offer and using your tester?? thank you very much

[zombie]

Pm me your address, phone number I'll send it out in the mornings post, and give you a call to confirm it is sent.

You can do the test w/ the engine installed however it may be difficult to see all the potential leak sources.
Have the cvt (variator) removed as well as the flywheel.
The three main areas these engines leak are the crank shaft seals/ intake manifold seals/ base gasket seal

[super50zx]

thank you , pm sent

[zombie]

Got it. I'll have  it out in the morning

[super50zx]

flywheel off, seals actually look good and tight and seam to still be pliable, for the leak down test would i spray a bit of soapy water on them, correct? also where the pen is pointed the contact point is a tad rusty should i use some light sandpaper and clean that up some? thanks

[zombie]

Nice... You are ahead of the curve Bro. That bit you are pointing out is the trigger coil or pick up coil.
A little sandpaper won't hurt. In fact I have seen engines not spark because of rust there.

Don't trust how the seals look. It can/will deceive you. I'll send the tester out tomorrow morn at 9:00am. You should see it by Fri/Saturday.
Cool/Cool

Soapy water is the only way to find the leak... It's the bubbles you are looking for. It should hold 7 lbs pressure for 7 minutes. If not you gotta find the leak.
W/ no vacuum at the carb I suspect it will not even get to 7 lbs.

[super50zx]

cool man i know i would not have been able to get this far without your help...!!! just to be certain, I am removing this entire cover correct?