Post by cramersec
I have a 1993 DR250. It seemed to not be accelerating well, so i
decided to pull the carb and clean it out. It actually looked pretty
clean, although when i put it back on the bike started much quicker
than usual, so I assumed i had fixed something. Rode it down the road
a couple of miles, and it started to bog. I stopped and it would idle
and re-start fine, but as soon as I cracked the throttle it would
stall. Limped it back home and took it to a local tech, who says he
has gone through the carb multiple times to no avail. Ideas?
My '95 DR 250 is doing the same thing. I haven't dug into it yet but it's
almost certainly something blocking the main jet. It idles just fine and runs
up to about half throttle just like nothing is wrong, but when I give it full
throttle it just dies.
I haven't opened it up yet but I'm assuming there's an idle circuit, a
transition circuit, and a main circuit. In my case the main is plugged, and in
your case I'd suspect the transition circuit. This circuit is often a tiny slit
in the throttle bore next to the throttle plate. It would be easy for this slot
to get clogged and not be apparent. Take the carb back off and look for that
slot. Shoot it with compressed air and then see if aerosol carb cleaner will
shoot through it.
Jack Hunt IBA#12795, STOC 1870
'99 ST1100, FaST Forward
'95 Suzuki DR250SE