QuestionMr Shively, I sent you a note to the address below but have not recieved a reply as of this mailing. As I said in my note. 3 of the plugs are a light tan and one of them was a little lighter in color.
Thanks Ted in Michigan
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Followup To
Question -
I have a 1984 Honda VT700c apporox. 21,000 miles
I've had it for 2000 miles. It has aftermarket exhaust (I think Jardine)slip on's the previous owner wasn't sure. (I like the pipes)
After riding the bike for about 50 miles on a hot day it will want to stall when taking off from stop. I have to feather it to keep it from stalling even on a rolling stop such as exiting a parking lot.
While standing still if I open the throttle to fast from a idle the engine will stall.
This does not happen until the engine gets thorughly warmed up. such as riding in town.
The warmer the engine gets the worse it gets.
Once moving it will run down the road without any problem and seems to run strong.
I was wondering if it could be a fuel problem created by a fuel mixture from the aftermarket pipes or a spark problem, The fact that it runs fine until it gets warm enough for the cooling fan to kick on while riding slow has me stumped.
Thanks TZ in Michigan
Answer -
Hi Ted,
Describe the appearance of the spark plugs. We'll go from there.
Reply to my email address: mshively1@woh.rr.com
Respectfully,
Mark Shively
Dayton, Ohio
AnswerHi Ted,
Sorry to keep you waiting. I replied to your questions, though the last reply did not reach you. I accept full responsibility.
The plugs are desirable colors. The air/fuel mixture is ok. I have a troubleshooting file that I cannot copy and paste here. Send me an email if you want to review this file. My email is: mshively1@woh.rr.com
It's difficult to say if the problem is fuel, electrical, or both without performing a few tests.
Respectfully,
Mark Shively
Here's another troubleshooting chart to review. The one I want you to see is very helpful.
Poor Running at Low Speed:
Spark weak:
Battery voltage low
Spark plug dirty, broken, or maladjusted
Spark plug cap or high tension wiring trouble
Spark plug cap shorted or not in good contact
Spark plug incorrect
igniter trouble
Pickup coil trouble
Ignition coil trouble
Fuel/air mixture incorrect:
Pilot screw maladjusted
Pilot jet, or air passage clogged
Air bleed pipe, bleed holes clogged
Pilot passage clogged
Air cleaner clogged, poorly sealed or missing
Starter plunger stuck open
Fuel level in carburetor float chamber too high or too low
Fuel tank air vent obstructed
Carburetor holder loose
Surge tank duct loose
Compression low:
Spark plug loose
Cylinder head not sufficiently tightened down
Cylinder, piston worn
Piston ring bad (worn, weak, broken, or sticking)
Piston ring/land clearance excessive
Cylinder head gasket damaged
Cylinder head warped
Engine not sufficiently warmed up after lash adjuster installation
Valve spring broken or weak
Valve not seating properly (valve bent, worn, or carbon accumulation on the seating surface)
Hydraulic lash adjuster damaged (worn, seizure, or spring broken)
Hydraulic lash adjuster oil passage clogged
Backfiring when decelerating:
Vacuum switch valve broken
Air suction valve trouble
Coasting enricher trouble
Other:
Igniter trouble
Carburetors not synchronizing
Carburetor vacuum piston doesn't slide smoothly
Engine oil viscosity too high
Drive train trouble
Final gear case oil viscosity too high
Brake dragging
Air suction valve trouble
Vacuum switch valve trouble
