Honda Spree and Elite 50 Forums

Dio89Elite wrote:nah, just temporary setbacks is all. you'll be up and running soon enough.

probably right. i just wish i knew what the compression problem is w/ the 51mm bore.



TJ

Your compression lost is right there in your pics. That's not a soft seize,right there is a a full seize.that's either from not enough oil or running to hot from compression or a combo of both.

bakaracer wrote:Your compression lost is right there in your pics. That's not a soft seize,right there is a a full seize.that's either from not enough oil or running to hot from compression or a combo of both.

yeah i know that the compression is low on the 46mm bore b/c of the piston.

But why would my compression be 75 on the 51mm bore that i just put on today?


TJ

Is that a new or used bore kit? When you kick it with a spark plug in the head,does the compression feel tight?

bakaracer wrote:Is that a new or used bore kit? When you kick it with a spark plug in the head,does the compression feel tight?

the jug has maybe 50 miles on it. the piston and rings and brand new.
and yeah when i try to kick start it, it feels like it has good compression.

make sure the oring is on the end of the gauge. also make sure the connections are tight on the gauge. kick the engine over till the gauge stops. oh and i hope you oiled everything before you installed it with 2 stroke oil?

bakaracer wrote:make sure the oring is on the end of the gauge. also make sure the connections are tight on the gauge. kick the engine over till the gauge stops. oh and i hope you oiled everything before you installed it with 2 stroke oil?

yeah i oiled everything. it's funny i installed the piston w/ the arrow toward the exhaust. checked compression and had like 30psi. so i thought maybe this piston is backwards from the rest i've done. so i turned it around and checked compression. this time i got 75psi. i think something else is wrong not the gauge but not positive.


Thanks:
TJ

if it runs at 75 then you no its the gage ..
swimmingfree

the arrow neeeds to point towards the exhaust port. does your gauge have the oring on the end that threads into the spark plug hole?

bakaracer wrote:the arrow neeeds to point towards the exhaust port. does your gauge have the oring on the end that threads into the spark plug hole?

i figured it was the arrow went toward the exhaust but since the compression was so low i tried turning it.
yes my gauge has the o ring on the end that threads into the plug hole.


TJ

Check the reeds next. Did you check both side crank seals? What about the oil injector or oil plug if you took the injector out?

do you have the rings on upside down it wont have good compression ????
there is one ring that has to be the top ring if it on the bottom it wont have good compression ..
if the pisaton is in

i figured it was the arrow went toward the exhaus YES but since the compression was so low i tried turning it. if you leave it this way the rings will snag on the ports a f up the jug and piston as well ..
swimmingfree

Greetings:

If two bores have low compr. on the same block, the problem is on the block.
One of the things Baka-san says, or the case half seal. That seized bore didn't look so bad to have dropped so much.

bakaracer wrote:Check the reeds next. Did you check both side crank seals? What about the oil injector or oil plug if you took the injector out?

i haven't checked the crank seals yet. i'll try to do that in a little. oil injector is working corectly.


TJ