I was given an older blaster that didn’t run and I rebuilt the top end and I only have 60 psi compression it’s the first two stroke I’ve worked on and I don’t know what’s wrong dose anyone have any ideas
Low compression
- Thread starter DCpunisher
- Start date
Did you have the cylinder bored and honed to the exact piston you're using ?
what is the new piston to cylinder clearance ?
3 heat cycles and retorque head and base bolts ? before compression test ?
what gaskets did you use ?
using a known good compression tester ? there aren't many cheap ones that are accurate
what is the new piston to cylinder clearance ?
3 heat cycles and retorque head and base bolts ? before compression test ?
what gaskets did you use ?
using a known good compression tester ? there aren't many cheap ones that are accurate
Attachments
This is the stuff I bought of eBay and I don’t know what a heat cycle is and when I first put it together I put the rings on upside down do you think it messed them up
Did you put the piston on the right way?? Arrow points to the exhaust!!
Just my two cents but I would get a factory cylinder and have it bored along with a wiesco piston kit. Those chinese cylinders off of ebay are usually not very good.
Yeah the piston is on right I still have the factory cylinder and head the only thing I can see wrong with it is they stripped out the holes where the exhaust bolts on
I bought some new reeds that look like v force but they are unbranded and a lot cheaper and I think that’s why I have air coming out of the carb I’m gonna spend the money and order the v force reeds and see if that fixes it
No it won’t start unless I put a little fuel in the cylinder then it will start for a couple seconds and die
