BV200 Idles but wont run By drewvs (Read 902 times)

[drewvs]

Friends,

I have a BV200 which has not been ridden for a few years.  I am getting it cleaned up for my wife and found that it would start, and it will idle for 2 minutes or so, but it the throttle is turned even by a very small amount, the bike will immediately stall.

I removed the right side and disconnected the output of the fuel filter.  I found that there was plenty of fuel being delivered, so I think the pump, filter, etc. is all OK.  Also, removing the fuel cap made no difference so I see no venting issue.  Plus and ignition seem fine as best I can tell.  I have replaced the fuel with fresh and tried to run some Seafoam through it, but at idle this isn't much.

Does this leave just the carb as an issue?  Varnish buildup?  I am definately not an expert and would not want to remove the carb and break it down without some good instructions, which I have not found.  Can I clean this to any worthwile degree while on the bike?

Is there another likely problem?  Can anyone point me in the right direction to solve this?

Many Thanks,
Drew

[Alleyoop]

Yea the pilot jet and passage are most likely varnished up. So cleaning the pilot jet and passage will fix the the problem. Right now it is starting and running off the enricher but as soon as the enricher cuts off the extra fuel is dies due to no gas.
If you can loosen the carb and tilt it to get the CARB bowl off and if you can get at the jets you can probably get away without taking off.
Alleyoop

Here is how to clean it out and clear the jets and passage.

scooterdoc.proboards.com/thread/12495/clean-carb-jets-passages?page=1&scrollTo=113211

[cyborg]

Bingo alley

[drewvs]

Extremely helpful sir, thank you!  I will try it this week.

Drew

[cyborg]

SIR?

[drewvs]

Got 'er done!  The carb had no room to rotate but I was able to remove it (somewhat difficult) and check the jets.  You nailed it...all jets were fine EXCEPT the pilot jet, which was completely blocked. Spraying and soaking didn't free it, I had to run a thin wire through it and then follow with soak and spray.

After reassembly, it still didn't want to run past idle, I had to "tease" it up to high rpm a little at a time in bursts (which previously I could not do at all).  Eventually it revved up and after a short ride it was better than before the problem.  Got 80 mph out of it.

Actually, every year on first use I had a milder throttle problem for a while.  It must have been sticky all along and recently got worse.  Problem seems solved now.  Many thanks from this total newbie!

Drew

[Alleyoop]

FANTASTIC!! GOod job cleaning the carb out, sometimes you have to use a needle point to clear the tiny Pilot outlets by the butterfly cause they are so tiny.
Alleyoop

[jct842]

Might get some sea foam into the gas to clean up any residue that remains in the tank, lines and carb.

[Alleyoop]

I add 1 oz of seafoam per gallon and 5 years now I have not had to clean out the carb. Also a good thing to do if you put the scoot away say for the winter is start it up once a week no lights and let if idle for about 15 minutes and that way it will charge your battery and anytime you want to ride it will start right up for you.
Alleyoop

[richard50]

Hi all, I am new to the forum, and I have a new to me 2011 GTS300. It was owned by a retired gentleman that rarely rode it (it had 190 miles on the odometer, after 5 years!).
It sounds to me like I have a similar problem as drewvs. I have ridden the scooter several times for relatively short trips (10 - 15 miles). Twice now it has acted like it runs out of gas, and stalls (fuel tank has more than a gallon of non-ethanol).
Could the carburetor jets be the problem on mine, too?
If so, I'm not sure I'm technically capable of cleaning them, would have to trailer the scooter to the shop.
I appreciate any info that you could share with me.[/font]

[cyborg]

I would put a sizable wager on it,,,,take care of it yourself ,,,it's not all that difficult

[Kaveman]

Even a Caveman Could do It !
I agree with Cyborg , I would try doing it yourself first. There should be a manual with a parts listing and diagram online. Getting a shop manual for your scoot is a big help especially for those who have never torn into their scooters before. The worst you could do is have to take it to the shop for them to finish what you started.
willc.

[cyborg]

just for fun start it and run it and when it "runs out of gas and stalls" open up the fuel cap to see if air rushes in ,,,if it does you have a tank venting issue