Two stroke motors.

[wanderer33]

Hi friends.
Would anyone be able to tell me what should the compression
ratio be on the new chines 80cc motor ?
With Thanks. Vlad.

 

[Tinker1980]

The compression ratio is very low, on the order of 6:1.

-Mark

 

[Skyliner70cc]

a little higher if you have a slant head engine

 

[wanderer33]

Thanks friends for information on compression ratio but I'd like to ask little more on
the subject.
I'd imagine, once the motor starts loosing power, one will have to replace piston rings
but I'd like to know the ratio in numbers, how low can compression go down before one
have to replace rings ?
Also " Skyliner70cc " pardon the ignorance but I'm not following the expression about
" slant head engine " as all motors - chines 2 strokes - are in the slant when mounted
but I'd appreciate if you'd explain what you mean by " slant head ".
Thanks again. Vlad.

 

[azbill]

some heads have the sparkplug at an angle...they are called 'slant-head'

 

[solitus3989]

some heads have the sparkplug at an angle...they are called 'slant-head'

NORMAL (click for link)


SLANTED (click for link)


The slanted raises compression, as mentioned earlier.