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Post by pistonguy on Oct 26, 2015 12:12:47 GMT -5
so.. update.. more data to offer as well.. there was a build up of oil in my cylinder.. said he took the valve cover off and oil blasted out.. not just a little bit running out like normal.. but sprayed it out good. 2 days before I had this issue happen, I had a belt brake.. had a buddy take my bike on the back of his truck to the shop. well.. it wasn't strapped up, but leaned over a bit. mechanics suspicion is this allowed extra oil to get into the engine and since it only has a pump that blows into the engine but not back out, the oil was trapped and it built up pressure to where compression was too much for the starter motor. once the extra oil was removed, it starts on the old starter and the new kickstart i just added. le sigh.. new starter arrives today.. new bendix on thurs.. that i don't really need now. and if i paid mechanic prices for this guy, i wouldn't keep going to him. he is a good guy, and is very knowledgable, but definitely isn't 'new school' for anything. (not that a compression tool is new school) - he works on scooters for a living.. and if given time, he can diagnose anything.. his understandings of how everything work are great.. and his prices are fantastic.. this is the first time that i have stumped him this bad... The real thing to diagnose here would be WHY. I mean oil doesn't go into the cylinder normally. The Bike laid n its side for Who knows how long. Ive marke the Oil Ring scavenging holes, The Oil Ring is scavenging Excess Oil from the Cylinder and those Holes Drain Back the Oil to the Crank case. The Scoot on its side for ?? long will get oil up through those holes and through your ring End Gaps and the Cylinder.  |
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Post by lain on Oct 26, 2015 12:15:47 GMT -5
The real thing to diagnose here would be WHY. I mean oil doesn't go into the cylinder normally. The Bike laid n its side for Who knows how long. Ive marke the Oil Ring scavenging holes, The Oil Ring is scavenging Excess Oil from the Cylinder and those Holes Drain Back the Oil to the Crank case. The Scoot on its side for ?? long will get oil up through those holes and through your ring End Gaps and the Cylinder. But he said he had it working recently then he had to get it fixed right? |
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Post by pistonguy on Oct 26, 2015 12:16:15 GMT -5
well again.. this is what he says.. but that if a bikes orientation is wrong.. (too much on its side and not straight up and down) that its not uncommon for oil to get into the engine... and that normally it doesn't cause big problems bc there is normally enough wear on the rings for the engine to work it out of the engine.. since mine is essentially new..and not worn enough.. the oil was trapped.. i know that a bike being on its side can be really hard to start afterwards.. and ive always assumed that it was from oil being able to get where it was not supposed to. sad thing is.. this all could have been avoided by just draining my oil... ba dum tis... Transport the Scoot Correctly. Easy wheel Chock can be made from 2X4's or old Pallet wood, 2 tie downs from Harbor freight |
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Post by pistonguy on Oct 26, 2015 12:36:59 GMT -5
The Piston at Ambient Temperature is also .017 Smaller on the Ring lands than it is at the Bottom of Skirt 90Degrees from pin. Very easy once oil up in the cylinder to get past the top rings.  |
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Post by lain on Oct 26, 2015 14:50:18 GMT -5
Well that explains why my 150 engine was leaking when I had it sitting in a box for so long it got moved around and was on it's side for a month or so took it out and saw some oil come out of the exhaust.
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Post by pistonguy on Oct 26, 2015 15:54:40 GMT -5
Well that explains why my 150 engine was leaking when I had it sitting in a box for so long it got moved around and was on it's side for a month or so took it out and saw some oil come out of the exhaust. Yup!  |
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Post by freespirit on Oct 26, 2015 16:04:25 GMT -5
well again.. this is what he says.. but that if a bikes orientation is wrong.. (too much on its side and not straight up and down) that its not uncommon for oil to get into the engine... and that normally it doesn't cause big problems bc there is normally enough wear on the rings for the engine to work it out of the engine.. since mine is essentially new..and not worn enough.. the oil was trapped.. i know that a bike being on its side can be really hard to start afterwards.. and ive always assumed that it was from oil being able to get where it was not supposed to. sad thing is.. this all could have been avoided by just draining my oil... ba dum tis... Transport the Scoot Correctly. Easy wheel Chock can be made from 2X4's or old Pallet wood, 2 tie downs from Harbor freight That is the lesson to be learned.. although tbh.. my belt broke while on my lunch break and it was all i could do to find a ride.. didn't have time to build anything.. [/quote] |
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Post by pistonguy on Oct 26, 2015 16:41:18 GMT -5
You gotta do what ya gotta do sometimes and thats all good.
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Post by freespirit on Oct 27, 2015 10:21:21 GMT -5
heh.. i swear.. i love scooters.. but they can be aggrevating when they have issues..
so.. my scooter is starting great.. but its not running as good as it was... it has less power.. it also is doing this thing where after its run WOT for a while, and then I stop. When I first give it gas, it hiccups.. what I mean is it does nothing for a moment.. does not stall and then goes back to running ok. it only does this after it has run WOT for a couple of minutes. If after it hesitates, I back off and try to duplicate it.. nothing happens.. its only when I run it for a bit.. then stop.. that it hesistates/hiccups..
and ofc, when this all happened, I had just had my CVT worked on... new clutch, and put in replacement roller weights. (5 gram weights) -
my acceleration isn't as good.. but the top end is ok.. thought maybe it was the roller weights as it wasn't accelerating as well.. but the top end is ok.. but the weights are light.. and the engine doing that hiccup thing makes me believe it is something else.
Just got my uni air filter in the mail to replace my airbox.. my buddy said that could cause some of the issues.. but it didnt when the airbox was on before..
not sure if its a vacuum line getting squeezed.. but we did check that... (when I first got the scooter back from him.. it ran ok.. at a stop light it died.. and then would start but die after giving throttle.. a vacuum line was pinched and we fixed that... (or thought we thought) and its been running fine at lights except for that momentary hesitation and lack of full power..
one more hint.. it ran better this morning when cold and as it warmed up it ran worse.
sorry to ask so many questions...
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Post by pistonguy on Oct 27, 2015 10:49:47 GMT -5
That Dude Did Check the Jetting, Re-Jet Accordingly for the Uni Filter Correct?
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Post by lain on Oct 27, 2015 12:18:47 GMT -5
Sounds like running slightly rich at the idle or possibly the beginning of mid range (where the needle position starts to effect mix). Try a smaller main jet by 1 or 2 numbers. But before that try adjusting the needle position. Could also be slightly off timing. Check valve gaps again, make sure they are what you set them to. Could also be slight intake leak, check the manifold and intake spacer for cracks and make sure the gaskets are not torn up.
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Post by freespirit on Oct 27, 2015 12:52:33 GMT -5
havent put the uni on yet..
the jet that is in it now is likely a bit too big for the airbox.. although.. before this all happened.. it did run fine..
will try to sort this out after work today.. thanks for the ideas...
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Post by lain on Oct 28, 2015 5:26:41 GMT -5
havent put the uni on yet.. the jet that is in it now is likely a bit too big for the airbox.. although.. before this all happened.. it did run fine.. will try to sort this out after work today.. thanks for the ideas... Hmm... Did you change your spark plug after you foubnd out your combustion chamber was flooded with oil? The spark plug most likely got oil in it, it would make the spark plug fouled if not cleaned realllllly well or replaced. |
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Post by freespirit on Oct 28, 2015 15:28:07 GMT -5
didnt put the old plug in... as it was one w/ a resistor and my mech swears they are bad if you have a resistor in the spark cap as well... not sure the quality of this plug.. ill definitely check that here after work... my old plug (the one before the iridium one) is sitting right here and really wasnt in bad shape at all.. i just wanted to see what all this iridium buzz was about... (still am i guess...)
not sure whats going on.. it could be restriction from the airbox..
as to why it was working before and not now.... my theory is... it wasn't getting enough fuel before.. the petcock would work.. but really struggled.. like when you manually check it.. (using your mouth on the vacuum tube) it barely was letting any out.. the new one is working proper.. it gushes out as it is supposed to..
its been raining all week.. and while i still ride to work.. im not fool enough to do work on it until it dries up a bit. am seeing the sun for the first time in a few days.. maybe ill get to check that plug and put on the new filter... i hear good things about uni's...
edited to add- thanks lain and the rest of the gang for helping me out. it is noticed and appreciated!
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Post by rcq92130 on Oct 28, 2015 18:45:11 GMT -5
I am still WAAYYY confused.
You say your mechanic is great.
OK - so at the first hint of ANY possible engine problem the first thing he would have done is pull the plug, screw in the compression tester, and see what the compression was. Ten minutes. He didn't, which is IMPOSSIBLE for an actual mechanic.
Next - without even checking he came to the conclusion the compression was too high. First thing any mechanic would have done is pull the plug, screw in the compression tester, and see what the compression was. Ten minutes. He didn't, which is IMPOSSIBLE for an actual mechanic.
Then he theorized the combustion chamber was filled with oil (or gas, or zebras ... whatever). First thing ANY mechanic would have done is remove the plug and turn the engine over, which would have spit any zebras or walruses or oil out the plug opening and cured the problem. FIVE minutes. He didn't.
I'm kind of doubting the "great mechanic" thing .....
So now the scooter is magically running (all those pesky T-Rexes must have departed the combustion chamber) but it's showing some symptoms of incorrect tuning. First thing ANY mechanic would have down is tune the damned thing, including any different jets (if needed). He didn't ....
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