does all engines run same plug?

[Peter1230]

if its a different model.. its probably a different size.... not a good idea at all.

 

[exquisit]

different model plug?
isnt it same size just different heat range?
i mean from 8 to 7?

 

[Peter1230]

oh im not to sure.. just the ch7 is the generally used plug.. wouldnt use others.

 

[exquisit]

oh do you have motovert rx125 or jialing 125 engine?

 

[Peter1230]

nah 155z engine

 

[Dabomb]

ive used a CR7HSA & CR7HIX in me RX and they've been fine.

I cant see the problem with using a colder plug like a CR8 as road riding tends to heat the RX's up a bit.

 

[exquisit]

i thought it was the other way round as in lower the number the colder it is...
or is it the other way?
lol

 

[Dabomb]

the higher the heat range the colder the plug.

So the more heat produced by the engine, doesn't effect the plug as much cause the plug is colder.

In other words the higher the heat range the better the spark plugs ability to dissipate heat.

 

[exquisit]

righteo!

and what does every1 gap the plugs to?
or is that also different from engine to engine?