110cc Pitbike, HELP!!!!!

[rossetti]

about hte oil. your better off using fourstroke motorbike oil because its reccomended for the gears too the car motor oil is not.

 

[fordrule]

rosseti, yeh i didnt try the mtho, i just took out tank completely emptied it, rann clean fuel threw the tanks to clean out, then filled it up n put bak on bike. Since i did 2 engine flushes n put clean unleaded fuel in, the bike blew alot less smoke on idle with choke off, but blows a shit load of white smike wen revved. Yeh i tried turning idle screw up and down but not much changed. I noticed when its idling it will make a poping sound every few seconds as if it might be missing a beat or two, im not sure might just be lots of back-firing?. I have no idea what spark plug im spose 2 use, but thats what bowell scooter told me to use??? they also told me use 15w50 if rings are gone, but i put in 20w50 could they be other probs why it blows smoke? n they sed car oil is fine. When i put my hand infront exhuast like all these small dots of sludge or oil splatter on my hand.

if i posted a video of what is sounds like and looks like, do
you reckon u might be able to help me better? just list some things
you want me to do to the bike in the video wich may help solve my prob.

cheers!

 

[Gawain]

If liquid oil is spraying out the exhaust... Definate oil leak from valve guides or rings. Check the plug for oily deposit, that will confirm.

 

[rossetti]

ahk. id still go with the c7hsa. id say it may be running to rich when its popping. was it the idle screw or the fuel/airscrew you turened up?. um the different weight oil wont change the smoke. 20w50 is actually heavier that 15w50 but once its warmed up its all the same really. i still wouldnt like to use car engine oil in em though. could even be a blown head gasket. um does it have compression when you kick it? wheres the vid do you have a link to it or anything?

 

[fordrule]

how do you fix an oil leak from valve guides?
what will oil deposites on spark plug confirm?
how can i stop it from runnig so rich? ahh im not sure ay, its a mikuni carby,
i tightened the screw that faces towards the kick start, so yeh..? will it make much difference with the smoke if i changed the wrong one?
yeh i tried to take the head off the other day to see if it was just the gasket, but couldnt coz i didnt know how to take out the timing chain to get the head off? is there a manual to show how to do it?
how can i tell if gasket? um im pretty sure it has compression, coz it starts 1st kick easy n rides. I havent got the video yet, ill try n do it 2morow/durin the week. so yeh check bak for the link ok, cheers!

 

[rossetti]

oil deposites on ya plug confirm either bolwn rings, valve guides, gaskets, are stuffed. did the screw you turned have a spring on it?? not all do but some do. and yes i think its the right one youve turned. wont make any difference in the smoke. there is a thread in the tech talk forum at the top of the page. usually you wont need to take the head off to check. have a look where the head joins to the cylinder/barrel and see if you can see any oil marks.

 

[fordrule]

umm.. the spark plug is black, and the area around the spark plug is covered in oil. but i dunno if theres a blow gasket, although uner the head at the bottom theres like oil there, n i found when the bike was on there was a little bit of smoke commin from the head around the exhuast area. When i get a video ill show you. yeh i turned the one with a spring. wheres the thread u sed, i can find it?

 

[rossetti]

ok i think you may have a blown head gasket. and the smoke around the exhaust area is probably just because there isnt a good seal around the head and where the hearder pipe of your exhuast goes
link to the thread:
http://www.miniriders.com.au/tech-talk/21075-how-tear-down-head-cylinder.html

 

[fordrule]

thanks for that mate,
wat ill do is take apart 2 day, see if stuffer if it is, ill post a video.

cheers!

 

[rossetti]

ok no worries let me know what happens

 

[fordrule]

hey guys, i didnt get round 2 a video. but here are some photos of the inside of the engine.
the rings n bore seem to be fine to me, what else could be wrong?
when i took it apart i found the cam cover gasket n the gasket that attached cylinder to motor were ripped, could of been when i took it off.
what else could be wrong??

here are the photos, tell me what you think.
(just click the links, then click on the image to see fullsize)
valves:

[img=http://img66.imageshack.us/img66/5937/1301092147mc0.th.jpg]
[img=http://img66.imageshack.us/img66/2272/1301092149ny4.th.jpg]

Bore:

[img=http://img520.imageshack.us/img520/9513/1301092144cg7.th.jpg]
[img=http://img76.imageshack.us/img76/9067/1301092143kq2.th.jpg]

Piston/rings:

[img=http://img388.imageshack.us/img388/7812/1401091252yk9.th.jpg]
[img=http://img80.imageshack.us/img80/2438/1401091253pz8.th.jpg]
[img=http://img57.imageshack.us/img57/5140/1401091254ae0.th.jpg]
[img=http://img210.imageshack.us/img210/9206/1401091251kq3.th.jpg]
[img=http://img73.imageshack.us/img73/473/1401091250le5.th.jpg]
[img=http://img371.imageshack.us/img371/5760/1301092140kq7.th.jpg]

 

[rossetti]

valves, bore, and from what i can see the rings and piston are ok. i dunn i guess you could try just replaceing the gaskets and then puttin it back together and trun it again

 

[fordrule]

yeh but it was a tiny tear in the cam gasket, how would that cause ALOT of smoke?
the guy who posted the "how to tear down a head n cylinder" sed it looks like the rings, if could have a look at that post agen for me n check to photos i posted there, n tell me what you think from those pics?

cheers!

 

[Dabomb]

replace the rings and gaskets then report back if its still buggered,.

 

[fordrule]

will do mate, waitin for rings to arrive.