Jump to content

Banshee 2-1 carb engine misses on left cylinder.


mccarthy_21

Recommended Posts

desperate for advice. I purchased a 97 banshee saturday, and that day i never noticed it, i even felt the exhaust pipes, but it is not firing on left cylinder. The engine and exhaust are stock. Has stage 1V trinity 2-1 carb setup, new stator and cdi which is red i believe a ricks hot shot. All previously installed by owner. oh ya right sides warms up and sounds great, and left occasionally pops.

what I've done:

-cycled two new plugs thru Left side

-checked spark, and both side have great spark, and i believe both sides fire everytime?

-single carb setup getting fuel

-check reeds look good

-swapped plug wires for hell of it

-searched harness for bad spots

-grounds seem good

-i could not find my compression kit, and this is cheesy but i could not hold my finger over hole, both sides popped off with resonable force.

-could not get flywheel off to check key, my tool broke i even used a little heat and slight hammer taps.



Granted i need to truly check compression what am i missing.

 

please visit link for more info:http://www.trx250r.net/forum/engine-transmission/21183-banshee-2-1-carb-engine-misses-left-cylinder.html

 

Link to comment
Share on other sites

  • 2 weeks later...

I did leak down test putting 6lbs in for 6 minutes and 4 after the 6 mintes were up.  The compression was 30psi left and 60psi right.  Upon tear down left piston was scored and both cylinders were beyond out of spec, so i punched it out to 65mm.  Still same pronlem as before good psi though.  I have oem cdi on the way.  Will be inspecting stator area more after i make a puller.  Does the 2 into 1 carb play any affect here.  also posted on http://www.trx250r.net/forum/engine-transmission/21183-banshee-2-1-carb-engine-misses-left-cylinder.html

 

thanks

Link to comment
Share on other sites

its the next thread below this one but here ya go:

 

Next, here are some electrical specifications for an '87 and up Banshee:

Stator resistance:
Ignition coil should be 13.7-20.5 Ohms (red to green wire)
Pickup coil should be 94-140 Ohms (white/red to white/green wire)
Lighting coil should be 0.26-0.38 Ohms (black to yellow wire)

Coil resistance:
Primary coil should be 0.28-0.38 Ohms
Secondary coil should be 4,700-7,100 Ohms

Pickup coil gap: 0.015"-0.020"

Spark plug: NGK BR8ES

Spark plug gap: 0.7-0.8mm (0.028-0.032")

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
×
×
  • Create New...