weird noise?
- Thread starter aubryblaster97
- Start date
That is ok compression.
Now ya need to do a Leak test! If you do have a leak, it won't take long before you fry the top end (experience talking). If ya don't have the money to buy it- all ya have to do is pay shipping both ways and you can borrow it, BTW shipping is $5.70 each way USPS priority mail with conformation. If you live an hour or less from pittsburgh, pa, I can come to you and show you how to do the test!
$11.40- V/S an top end rebuild- Your choice.
i took the head off and this is what i found. the carbon build up has chipped off and must be rattling somewhere?and a leaky gasket
pics in good lighting of the cylinder walls and piston sides
and when you get gaskets, no green base gaskets...........
factory yamaha or cometic only !!!!!!!!
heres the cylinder walls
heres a video of everything. it all seems to be shiny and new looking except the top
heres a video of everything. it all seems to be shiny and new looking except the top
Well first things first in the vids all it sounded like to me was a normal 2 stroke with an exhaust leak.
Second from the pics id say run a hone through the jug providing it checks out when you mic the bore and if all is well either rering it if thats a forged slug or throw another top end in it if its a stock cast piston.And as said only buy oem yamaha gaskets.
I didnt personally hear a ticking time bomb but the obvious leaks you pointed out and the ones you didnt know of are bad.
Second from the pics id say run a hone through the jug providing it checks out when you mic the bore and if all is well either rering it if thats a forged slug or throw another top end in it if its a stock cast piston.And as said only buy oem yamaha gaskets.
I didnt personally hear a ticking time bomb but the obvious leaks you pointed out and the ones you didnt know of are bad.
yep, that all looks pretty good, you had good compression.
do you have somewhere local that could run a quick hone thru that cylinder just to throw some cross hatches in it ????
did i see above you seem to think there was a head gasket leak ???
that too could have been what you heard ??
how did the head bolts feel as you removed them ??? find any loose ones ???
and heres the best advice i can give you now....you obviously did the right thing so far, by stopping riding it, and checking things out, do not be in a hurry to get this back together and running just to go riding, take your time, listen to our advice, do everything properly and you just saved yourself some money, but your gonna at least need new gaskets to re-assemble it, then heat cycles, retorque, and break in period
do you have somewhere local that could run a quick hone thru that cylinder just to throw some cross hatches in it ????
did i see above you seem to think there was a head gasket leak ???
that too could have been what you heard ??
how did the head bolts feel as you removed them ??? find any loose ones ???
and heres the best advice i can give you now....you obviously did the right thing so far, by stopping riding it, and checking things out, do not be in a hurry to get this back together and running just to go riding, take your time, listen to our advice, do everything properly and you just saved yourself some money, but your gonna at least need new gaskets to re-assemble it, then heat cycles, retorque, and break in period
the only bolt that felt weird was when your sitting on the quad was the one right above the exhaust port on the head. it felt loose . ill call around town to see how much a hone is. but what would yall do?
that front right head nut looks to be where the head gasket was leaking in the above pics, i see wetness around that area ???? and quite possibly was the noise you heard ???
and yes, get a local shop to give it a very light hone, just enuf to break the glaze and get some cross hatches in it, you do not want them removing any material....
just a very light hone, be certain they understand that
and be sure to use some 2 stroke oil to lube the cylinder/piston when reassembling it
and yes, get a local shop to give it a very light hone, just enuf to break the glaze and get some cross hatches in it, you do not want them removing any material....
just a very light hone, be certain they understand that
and be sure to use some 2 stroke oil to lube the cylinder/piston when reassembling it
okay, i got new gaskets
, need a light hone to break the glaze. what about the piston? should i buy i new one? or could i take my dremel to it and take the carbon off it?
, need a light hone to break the glaze. what about the piston? should i buy i new one? or could i take my dremel to it and take the carbon off it?If you have feeler gauges check side clearance of rod to crank. When working on engine stuff rag around crank/rod to avoid stuff falling in. Clean parts well especially gasket surfaces. DON'T use gas for cleaning. Make sure to install head gasket correctly. Make sure rings are aligned with pins when installing jug.
Also, because you had just been in clutch cover, pull it back off and double check everything you did plus look at counter balance gear. Don't know if mine went and took out bearing and case or bearing went first. Neither my son or I were driving it when it let loose.
Also, because you had just been in clutch cover, pull it back off and double check everything you did plus look at counter balance gear. Don't know if mine went and took out bearing and case or bearing went first. Neither my son or I were driving it when it let loose.
