Engine failure?

superseagulls · Post by **superseagulls** » Wed Feb 15, 2012 10:13 pm

So I'm riding tonight, pull up to some lights and the bike feels like it's trying to pull a little - it's not wanting to stay stationary. The revs are up, and remain above whats normal. I pull away, and a lot of smoke coming from the exhaust pipe.
Any suggestions, blown rings? fixable? Ahhhhhhhhhh

easy · Post by **easy** » Wed Feb 15, 2012 11:52 pm

with the rev going up and the scoot pulling maybe something hung up in the carb and the smkoke was to much fuel

viney266 · Post by **viney266** » Thu Feb 16, 2012 2:13 am

How did it run after that?

Could be a stuck carb float, pull the spark plug and have a look. Gotta figure out what it is first. Also, if you can find the drain screw under the carb, try draining the carb and restart it . See what that does.

superseagulls · Post by **superseagulls** » Thu Feb 16, 2012 2:34 am

Thanks for the insight guys.

If you stop the engine, and restart it, there is a lot of oily smoke, as you wind open the throttle, the smoke goes away.
The exhaust was blowing yesterday (both nuts came off of the new Prima pipe - not sure why) not sure how long for, I had ear plugs in and only noticed it when I went out to the gas station later on without earplugs in!

There is definitely some gremlins going on (unrelated I know) but the Speedo also died yesterday also! My wife is going crazy at me......

agrogod · Post by **agrogod** » Thu Feb 16, 2012 10:19 am

Is the smoke white or black?

White smoke would indicate oil getting into in the combustion chamber, and black smoke too much gas.
If its oil then the rings would be the primary suspect and this could indicate a rebuild.
And of course gas problems may be pointing to your carb.

BuddyRaton · Post by **BuddyRaton** » Thu Feb 16, 2012 1:51 pm

What motor is in it?

PeteH · Post by **PeteH** » Thu Feb 16, 2012 1:57 pm

According to an earlier thread, he mounted up a new Prima 125/150 pipe, so I guess it's not the 50 Intl.

superseagulls · Post by **superseagulls** » Thu Feb 16, 2012 4:53 pm

Well it "let go" this morning on the way to the Orlando Genuine dealership...

Lost all compression, rattled a bit then stopped.
White smoke, so I would guess piston rings, with a damaged bore / piston. Will get it into the shop and see if they will rebuild the top end, the crank is turning over, so I guess it may be rebuildable......

agrogod · Post by **agrogod** » Fri Feb 17, 2012 12:04 am

Wow

that's a bummer, depending on cost it may be easier to replace the engine.

easy · Post by **easy** » Fri Feb 17, 2012 2:40 am

sounds like with the loose exhaust you run it long enough to burn valves if you lucky maybe just need a head and cylinder

Post by **ericalm** » Fri Feb 17, 2012 3:15 am

agrogod wrote:Wow that's a bummer, depending on cost it may be easier to replace the engine.

Very true, especially if you can find a lightly used one.

easy · Post by **easy** » Fri Feb 17, 2012 3:43 am

if you aint holed the piston/loose metal and the piston rod is still good just bbk

JHScoot · Post by **JHScoot** » Fri Feb 17, 2012 12:04 pm

easy wrote:sounds like with the loose exhaust you run it long enough to burn valves if you lucky maybe just need a head and cylinder

pretty good guess considering the prima pipe was not installed properly and the scooter run for a time like that

just sayin' because someone in my apartment complex had a similar thing going on with a 250cc cycle and a week later it was valve job city