I've got quite a frustrating problem now after I partially rebuilt my '98 Storm's motor.
Some history first: About 2 months ago the rear CCT broke while I was on the freeway. As you can imagine it caused quite some damaged. It bent all 4 valves to the point where one exhaust valve head actually broke off. That caused the piston to get damaged and the con-rod to get bent.
Now that I'm trying to get it running I'm getting a total misfire on the rear cylinder, as if the timing is out. If I disconnect the rear plug then it's a "smooth" sound with just the front running but with the rear plug it sounds very uneven with backfiring.
There is definitely spark on the rear cylinder but the plug (new) doesn't change color while the front has already started changing color.
When I striped the motor I didn't take the timing sprocket off from the crank so it can't be that. Am I correct in understanding that it doesn't just fire at once in each cycle but multiple times?
All pointers and help will really be appreciated.
Bad misfire on rear cylinder
Could be a number of things if you do a search under workshop and for cct's.
Things that spring to mind;
Cam chain timing out by a tooth or 2 (very easily done!)
Valves not ground in properly (sounds strange but there have been reports)
Bent big end causing timing pick up miss when to fire.
On the bright side, as it's the rear cyclinder, access is a lot easier!
Things that spring to mind;
Cam chain timing out by a tooth or 2 (very easily done!)
Valves not ground in properly (sounds strange but there have been reports)
Bent big end causing timing pick up miss when to fire.
On the bright side, as it's the rear cyclinder, access is a lot easier!