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Discussion Starter · #1 ·
I have a 2006 BF 650 SRA only mod is cdi. It barely starts and runs. It boggs out really bad. Seems to be popping back through the air box. Put the stock CDI back in and doesn't help. It's full of premium gas. The air cleaner is fine, there is no oil in the cleaner. Took out the front plug and it looked good and dry. There is gas going into the carbs.

I'm having troubles to gt it to start now. I even put a little shot of starting fluid in the carbs and nothing happened. I did get it to run after that though. That's when I put the stock CDI in. Still took alot to get it to start then. I put the trickle charger on it and went baack an hour later and now I can't get it to even fire again.

This morning I rode it to my Parents house and let it idle for a while and when I come out it had died. I restarted it and it idled fine. Went to take off and it would barely spin the tires in reverse on hard pack snow. Took off for home and WOT it would only do about 31 mph.
 

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carbs

Pull the carbs.........clean them both..........trash in a pilot jet is the problem.........install an inline fiber fuel filter..............
 

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carb

I would agree with above, that there is probably something in the jet in a carb. Sounds like what mine was doing when I had a small piece of dirt lodged in the jet in one of my carbs. Try cleaning them and see how it runs.
 

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Discussion Starter · #8 ·
sounds good. does anybody have any tips on getting carbs out or apart. Haven't ventured that far in before. Just as far as air box off
 

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Clean means clean..................

Its best to not separate the carbs when you pull and clean them.........otherwise you will need to re-sync them............

You need to be a very thorough mechanic in order to attemped the carbs...............the carbs usually separates the men from the boys........
 

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definately take your side plastics off and your airbox. Make sure you have a drain pan to for excess gas that will come out when you are moving it around. I would only use carb cleaner to clean it out, no break clean or anything, just carb cleaner. There are a lot of small pieces in the carbs, so make sure you are careful with them and keep track of them.
 

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Its best to not separate the carbs when you pull and clean them.........otherwise you will need to re-sync them............

You need to be a very thorough mechanic in order to attemped the carbs...............the carbs usually separates the men from the boys........


And Ditto, I wouldn't separate them either...
 

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Discussion Starter · #12 ·
Allright. Thanks guys. I will probably attempt to pull them tonight. Hopefully I'm not getting in over my head. But I suppose there is always somebody that can fix anything I wreck
 

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No problem, let us know how it goes and feel free to ask any more questions if you have any. Also watch the diaphrams cause I think they are pretty expensive to replace if you tear one. But aside from maybe inspecting them to make sure there is not rip or small hole in them, you shouldn't need to do anything with them (correct me if i am wrong anyone).

Good luck
 

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Discussion Starter · #14 ·
Well I tore apart as much of the carb as I could and sprayed it all down. Didn't see any gunk in it that didn't get there from me tearing them down. The brass slides for the chokes are really scratched up. I would think they should be smooth
 

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micro

Make sure all the jets and the circuits are clean.........sometimes the trash will come out easy............ and sometimes it takes more than air pressure.........it can be micro small..........
 

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When I did mine it actually took me taking them apart twice and cycling a bit of gas through to get them clean. I actually couldn't see the dirt the second time but I sprayed them down anyways and blew air through the jets and it ran like a charm after.
 

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Discussion Starter · #19 ·
Got the carbs put back in. The Chokes had some crap in them. Cleaned them up got the gunk out and put some oil on them and put back. Tried to start it and it cranked and then bang. Probably the loudest backfire I've ever heard from a quad. Tried a little more and nothing.
 
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