Help - Rear Cylinder not firing

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Jun 3, 2008 | 08:27 AM

barhog

Thread Starter

Cruiser

Joined: Jan 2007

Posts: 126

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Help - Rear Cylinder not firing

Short story - picked up a rolling chassis with and EVO motor - owner did not know exact year of motor but it is between 91 -96.

-Ignition : Crane Hi4
- Coil : Dual fire
- Wires - Crane Fireball for EVO motors

Bike fires up but no rear cylinder ...nothing nada

- Good spark
-Changed wires
- Changed coils
- Changed plugs
- Changed Hi 4

Checked timing numerous times, according to Crane inst if I find the timing mark and turn the HI4 it should go out at TDC....neither of the 2 Hi4 I have is working according to the inst.

Any help appreciated.

Thanks

JR

Jun 3, 2008 | 08:59 AM

DeJavu

Outstanding HDF Member

Joined: Jun 2007

Posts: 3,306

Likes: 5

From: Bellville, Tx

RE: Help - Rear Cylinder not firing

Possibilities, intake leak, stuck valve or lifter, bent or broken pushrod, blown head gasketor hole in piston.

Jun 3, 2008 | 09:08 AM

barhog

Thread Starter

Cruiser

Joined: Jan 2007

Posts: 126

Likes: 0

RE: Help - Rear Cylinder not firing

Rear cyl has very good compression so I doubt any of those issues but thanks for the reply and input.Changed Intake man gaskets also.

This is a strange one.

JR

Jun 3, 2008 | 09:40 AM

DeJavu

Outstanding HDF Member

Joined: Jun 2007

Posts: 3,306

Likes: 5

From: Bellville, Tx

RE: Help - Rear Cylinder not firing

Damn! You got me, you have fire, gas, compression? If the front fires youshouldn't be180* out on the timing with dual fire. Don't know where to go from there. Hope someone can come up with an answer! Good Luck!