Bandit Alley

MODEL SPECIFIC => SUZUKI BANDIT 250 & 400 => Topic started by: scorpionsf on July 04, 2010, 06:54:58 PM

Title: starting trouble
Post by: scorpionsf on July 04, 2010, 06:54:58 PM
hey,

i got all my carbs rebuilt. everything is hooked back up. new plugs and starter too.

the starter just turns and turns. the tach moves a few rpm's and the oil and temp lights go off like its running. there is airflow out of the exhaust. but it just wont start.

any ideas???

thanks,
brandon
Title: Re: starting trouble
Post by: Levi on July 05, 2010, 02:09:18 PM
Try a few puffs of some starting fluid in the carb intakes. It gets mi little beast going. Im having the same issues right now. I just rebuit my carbs and am putting them back in. Last time it wouldnt start just like this and I used starting fluid. It at least gets the engine turring for a few seconds to get some strong vacume that you cant get while cranking. It might help knock something loose thats stuck or might run rough so you can adjust it. good luck. Let us know how it turned out?
 U are getting gas to the carbs right????
Title: Re: starting trouble
Post by: interfuse on July 05, 2010, 04:08:02 PM
Did you set the petcock to prime to fill the carb float bowls?
Title: Re: starting trouble
Post by: scorpionsf on July 05, 2010, 04:20:56 PM
Did you set the petcock to prime to fill the carb float bowls?
not to be stupid, but how do you even do that? i only see res and on on the petcock
Title: Re: starting trouble
Post by: interfuse on July 05, 2010, 04:30:08 PM
Down is "ON"
Left is "RESERVE"
Up is "PRIME" but you might have to remove a stopper screw.

If you turn the knob to the "UP" position you've just turned the bike to "PRIME" which is FULL ON FUEL NO VACUUM REQUIRED.

Turn the fuel tap the "PRIME" for 30 seconds or so then start the bike. Easy.
Title: Re: starting trouble
Post by: scorpionsf on July 05, 2010, 04:45:35 PM
got them primed and overflowed a bit out of the bottom.

still no start though...
Title: Re: starting trouble
Post by: interfuse on July 05, 2010, 05:01:19 PM
Did you touch anything else other then the carbs? Are you getting spark? Sparkplugs wires going to the correct cylinders?
Title: Re: starting trouble
Post by: scorpionsf on July 05, 2010, 05:04:45 PM
Did you touch anything else other then the carbs? Are you getting spark? Sparkplugs wires going to the correct cylinders?
new air filter, plugs and starter, but thats it.

carb pilot air screws are all 2.5 turns out, but not all pointing in same directions

the left coil is going to cylinders 1 and 4. the right coil is going to cylinders 2 and 3
Title: Re: starting trouble
Post by: interfuse on July 05, 2010, 05:19:23 PM

new air filter, plugs and starter, but thats it.

carb pilot air screws are all 2.5 turns out, but not all pointing in same directions

the left coil is going to cylinders 1 and 4. the right coil is going to cylinders 2 and 3
[/quote]

That all sounds right. Dunno why it won't fire for you. All you need is gas, spark and compression.
Title: Re: starting trouble
Post by: scorpionsf on July 05, 2010, 05:23:33 PM

That all sounds right. Dunno why it won't fire for you. All you need is gas, spark and compression.

what is the the line coming out of the back side of the petcock do? thats the vacuum line right (per the emission control section of the owners manual, but it also says california model only)? there is no line on it right now. it is just open.
Title: Re: starting trouble
Post by: scorpionsf on July 05, 2010, 05:49:27 PM
basically what im asking is there any other line that connects into the tank besides the fuel line??
Title: Re: starting trouble
Post by: scorpionsf on July 05, 2010, 06:53:15 PM
bike started. but it wasnt idling well, it basically wouldnt run, and had zero throttle response.
Title: Re: starting trouble
Post by: scorpionsf on July 05, 2010, 07:31:26 PM
going to order new seals that go around the brass hose that connects the fuel between the carbs. there is a leak because some are cracked.
Title: Re: starting trouble
Post by: scorpionsf on July 11, 2010, 04:39:36 PM
seals replaced and the bike starts now. it wont idle very well. its almost like the idle changes from start to start.

im gonna try running some carb cleaner through it just for sh1ts and giggles. if that doesnt work im gonna try to do something with the pilot air screws
Title: Re: starting trouble
Post by: Unique on July 11, 2010, 08:30:00 PM
basically what im asking is there any other line that connects into the tank besides the fuel line??

You should have a Vacuum hose running from the left hand side of carburetors clamp position (intake manifold side) left as seating on the bike, going to the tank petcock.

Dek
Title: Re: starting trouble
Post by: scorpionsf on July 12, 2010, 05:17:28 PM
figured it out. yay manuals ahah im dumb.
Title: Re: starting trouble
Post by: scorpionsf on August 08, 2010, 12:40:28 PM
well i have a new starter and a new starter relay.

 when trying to start it the relay clicks and the starter gets power but wont turn the motor over. upon release of the starter button it sounds like the starter is spinning internally.

any ideas? engine seized???

thanks,
brandon
Title: Re: starting trouble
Post by: interfuse on August 08, 2010, 01:35:28 PM
Bad petcock and hydro-locked cylinder? Take out the plugs, thumb the starter and see if gasoline hits your ceiling. Or take out the plugs, put the bike in a high gear and push and see if the motor turns.
Title: Re: starting trouble
Post by: scorpionsf on August 08, 2010, 10:12:46 PM
Bad petcock and hydro-locked cylinder? Take out the plugs, thumb the starter and see if gasoline hits your ceiling. Or take out the plugs, put the bike in a high gear and push and see if the motor turns.
well i shot gas out of cylinder #2 by pushing it in 6th and then with the starter

since it was not running when it got hydro locked is it okay to assume that the engine should be fine?

thanks again guys,
brandon
Title: Re: starting trouble
Post by: Red01 on August 09, 2010, 10:27:37 AM
since it was not running when it got hydro locked is it okay to assume that the engine should be fine?

After an oil change to get rid of the fuel contaminated oil.
Title: Re: starting trouble
Post by: scorpionsf on August 09, 2010, 07:49:50 PM
oil changed. bike back together. charged the battery. bike started and idled nicely. but i wicked it up to like 5k(after it was hesitant to make any throttle adjustment) and it only dropped back down to 4k where it sat but had EXCELLENT throttle response. when revving 4k it also had some white smoke.

-brandon
Title: Re: starting trouble
Post by: Red01 on August 10, 2010, 01:39:48 PM
White smoke smelling like gas is, well... too much gas.  Other wise it is water.  Condensation should burn off shortly, if it keeps going, that's usually a sign of a bad head gasket or a cracked head.
Title: Re: starting trouble
Post by: scorpionsf on August 10, 2010, 03:59:35 PM
after a bit the white smoke goes away. im going to turn the pilot air screws back in a turn. they are at 2.5 turns out right now. and check my fuelcock for clogs.
Title: Re: starting trouble
Post by: scorpionsf on August 19, 2010, 04:00:14 PM
well i am not getting spark out of cylinder #3...