hi, I have a 2001 blaster that randomly bogs and shuts off and doesn't want to start again. it sometimes backfires when im trying to kick it over. it acts like its running out of gas. after sitting it starts up fine and runs great for a while but then its starts acting up again. tors unplugged, full fmf, don't know current jetting(previous owner didn't know) airbox lid on, and I just cleaned the carb. any ideas whats going on? thanks in advance
blaster doesnt run right
- Thread starter Blastinator
- Start date
Check your float levels in the carb. The main jet will have numbers stamped on them. They are sometimes hard to see. Do you have a good flow of fuel to the carb?
when you clean a carb on any bike for the first time that you bought used, you ALWAYS check what jets are in it. no matter what the previous owner says is in it or not, its fool proof to check for yourself. that knowledge of what jets are installed will save you money in repairs if the old owner didnt do what he should or didnt know better
Right on Kevin. Its better to know for yourself than take someones word for it.
where should my float levels be? and how do I check that? like I know what the float is but what am I looking for? and yea I do have good flow to the carb as I had to drain the gas out of the tank due to stale gas and I just disconnected the line from the tank to the carb and put that in the gas can and turned the gas on.
ok thanks. ill check my float height and jet sizes in the morning. and just to add it only started to do this in the cold. it was fine in warmer weather.
the colder it is, the leaner you will be. check that out, if everything is good, then you can move on from there.
ok. another thing. the rubber flap over the airbox was covering the airbox intake and when I pulled it up it ran good for a while but then started bogging and then it died.
Cold weather calls for the main jet size to be increased and sometimes the needle to be richened up.
It is possible to check the fuel level by attaching a length of clear plastic tubing to the drain nipple , lifting it up the side of the carby, and cracking the drain screw.
The fuel should show in the pipe to the level of the carb body above the float bowl gasket.
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List all of your engine mods, what jetting you now have, what temps it ran good at before, and what the temps are now. The more info on your set-up you share the closer we will be able get your jetting.
While you have the Carb off inspect your reeds. Backfiring sounds like a broken reed petal or a timing issue. If the reeds check out you may want to check your flywheel.
Like blaaster said checking the float level. That's an easy simple way.
Just a couple minor things to add. Since your already in there,give your carb a good overdue cleaning. I say overdue because if previous owner doesn't know the jet size most likely he hasn't cleaned it in a while, also who knows how long that gaswas in there and we all know what gas these days can do. Take a peak at your reeds too if you get a chance. Also look into a leak tester.
At first it may seem like allot to do but its really not. Plus for peace of mind its well worth going over and checking a few things.
ok. I adjusted the float height to 20mm. it was at about 23mm before. the main jet is a 230. and I checked the reeds a few days ago and I flipped them to be flush. and it still did the same thing. I thought it worked for a little bit but then same thing. the motor is stock other than someone lightly ported it. and I mean lightly. like I said fmf fatty and fmf silencer. airbox lid on. I still have the carb of. anything else I should look for? and I just cleaned it twice. took it all apart and sprayed with carb cleaner. didn't help.
im sorry I didn't specify but I didn't just buy the quad. ive had it for close to a year and just now started these problems.
You should be higher on the main with the fatty alone not taking into consideration the porting and colder weather . Plug chop to confirm. Do you have a leak tester? bigger jets? New plug? Compression tester? Your going to need those few things.
Fuel flow from the tank is consistent and steady? You should have a nice good.steady flow from your tank. How is your spark,? nice and blue?
also pre mix or oil injection.?
Fuel flow from the tank is consistent and steady? You should have a nice good.steady flow from your tank. How is your spark,? nice and blue?
also pre mix or oil injection.?
definitely check the fuel flow out of the hose, put a bottle under the hose that usually goes to the carb and turn the fuel on, if its not a steady stream then unscrew the cap, if that helped then your vent hose or cap vent are clogged. if the cap didnt help the situation you have to drain your tank, and remove the shut off valve from the tank and clean the screens that filter the fuel that are attached to the shut off valve.
ok. I just cleaned the fuel tank and the shut off valve. and I have good blue spark, but noticed a lot of junk on the connector that is on top of the spark plug along with the connection point on the coil. I cleaned that off. wondering if that was causing my problem? and I run 32:1 just put her back together and I will go see how she runs and posts results.
ok so at first it wouldn't start but it was puffing some smoke out. then I took of the spark plug to look at it and it was fouled pretty bad. I had another fouled plug lying around but it wasn't fouled to bad, so I switched just to see if there was a difference and supprisingly it started rite up, and reved alright. I got on it and put it in gear and gave it a little gas and it bogged out and quit. but it started rite back up but did the same thing. so do I just need to get a fresh plug?
