QuestionI have a 1999 suzuki Dr 200se with 1900 miles on it. the bike was running fine and has been left in the garage for a week when i went to start it it started on choke no throttle. when you put the choke in it will not respond to the throttle and cuts out. you can leave it to idle no throttle until it warms up, then the throttle does not respond very well and it revs up slightly and runs up to high idle and slowly drops back down and will keep doing that. the bike has not been modified, and all that I have checked so far is the air filter and changed the spark plug. After changing the spark plug it fired up without choke from cold and would idle until the engine warmed but if you tried to turn the throttle the engine will die. when it is completely warm it will do the same as before, rev slightly then engine speed increases and takes a long time to come down. where should i look next? Colin thebrains-trust@yahoo.com
AnswerHi Colin,
Review the following troubleshooting topics. I think investigating these topics will locate the source of the problem.
I'll send a few tech files to your email addy, too.
Respectfully,
Mark Shively
Fuel/air mixture incorrect:
Starter plunger stuck open
Main jet clogged or wrong size
Jet needle or needle jet worn
Air jet clogged
Fuel level in carburetor float chamber too high or too low
Bleed holes of air bleed pipe or needle jet clogged
Air cleaner clogged, poorly sealed, or missing
Surge tank duct poorly sealed
Water or foreign matter in fuel
Carburetor holder loose
Fuel tank air vent obstructed
Fuel tap clogged
Fuel line clogged
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)
