how to get piston back into cylinder..Tips anyone ?

im currently trying to put my engine back together,... and i cannot for the life of me get the piston back into the cylinder.. its so hard without special tools ..

Just wondering if anyone has any tips/tricks on how to do this without loss of blood.....lol

 

takes me 5 seconds haha
And you dont need tools..or, well they dont make tools that small and if you get one it will be expensive and does nothing more than what your fingers are supposed to do
Soo...
-make sure everything is lubed up
-rings are the right way around(something I never thought would happen to me after doing hundreds of them and just happened.)
-piston is the right way around
-G-Clips are in(I remember on my fist few engine I once forgot it. only realised once it was back in the quad and had the take the whole damn thing out! haha)
-Dont ever force it in, if you do something will break.
-make sure the ring gap is right otherwise it will either seize once it warms up on be lown and compression.(I will post the right clearances later)
-make sure the piston is right too. too small(std piston on very worn bore or on oversized bore) and it will fit but break once it starts due to too much clearance(the alloy used on them has Silicon, this makes it very brittle. but on the good side very good on wear and have a lown expansion rate)
-in the other hand too big and it wont fit at all(eg. .50 piston on std bore)
-put the engine on bdc(bottom dead centre) so once you push it in it can go down any further
-with your fingers gently work you way around the rings(compressing them) while pushing it into the bore, it should slide in if done like so. easy as. if you just try to push it in without working the rings so they can slide in you rings can easily break. its my biggest fear haha
Good luck and tells us how it went

 

cheers pal.. i just see this .. its all done now.. took me a grand total of about 6 hours...LOL

The 2nd ring wouldnt go down but eventually put bit of 2stroke on the piston and barrl and it went on 1st or 2nd time trying.. happy days

 

hope you put piston on right way round with arrow pointing to exhaust ,

 

yeah , i didnt take the piston off, it stayed on... was on right anyway so one less thing im worrying about now lol

 

When in dought... Copper hammer

 

i just didnt want to be too forceful on it reallyin case it broke something.. its on now, just hoping it dont rain tomorrow/tonight so i can re fit the engine and it should start

 

haha 6 hours a bit less time than me in my first engine..or well my first engine never got put back together again so haha It was completely gone anyways
good luck with getting the lil' thing going

 

lol yeah man.. just a bit long just hoping it starts.. dont like workin on my bike in the rain...its too wet lol...

cheeers matey, i hope i can get it running