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Posted

I checked the compression in the banshee tonight and its suppose to have fesh 25 over bore on it. it has Toomey T6's on it and both sides are at 90 but i took one pipe off and put my hand up to and it shot up to 120 so is it the pipes or maybe the rings??? please help

Posted

Take out both plugs, give it full throttle, kick hard and fast till it stops! Stock motor should be around 120-130 range. IF your guage is correct at 90 you prolly need a rebuild. :confused:

Posted (edited)

im suppose to give it WOT? i did know that i wasnt touching the gas. but why would it read the exact same on each side? and why would it shoot up if i put y hand on it? i also didnt have my silincers on does that matter?

 

it also fires up first kick and runs damn good. so idk its weird

Edited by BlasterKX
Posted
im suppose to give it WOT? i did know that i wasnt touching the gas. but why would it read the exact same on each side? and why would it shoot up if i put y hand on it? i also didnt have my silincers on does that matter?

 

it also fires up first kick and runs damn good. so idk its weird

 

2 strokes dont have valves that form a positave seal to keep the fresh air and fuel in the cylinder. The exhaust port is the first port to opean and the last port to close. So your going to have part of your fresh air and fuel go out the exhaust. This is why the type and shape of your exhaust pipe determines how your banshee runs. The exhaust pipe bounces a pressure wave back twards the engine to help hold in the new fresh air and fuel.

 

So you hand seals better than the pressure wave and that is what caused the psi to go up.

 

How2StrokeWorks.gif

Posted
So does that mean that different pipes can cause different psi?

 

I don't think you would see a difference on "kicking" compression but the pipes will play a major factor in flow and cylinder compression under actual running conditions.

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