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2001 Bombardier DS 650 Jetting ?'s...any suggestions/opinions
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By Jd101506
Hi all!
I've got a 1988 LT4WD that I am working on. It sat for almost two decades in a shed, so I replaced both the carb and the fuel pump (Pump was rusty, carb was ok, but had a pin hole in the bowl itself?). Now, I went el cheapo and I replaced BOTH with Chinese aftermarket Carb and Fuel pump. Now is where it gets confusing:
So I did this SAME thing on my other Quad, a 1988 LT300E. They take the same PN carb, and a similar fuel pump, (One has a 90 degree bend in the vacuum port). I've been battling the four wheeler a bit with some electrical issues, but I noticed that at idle it runs GREAT when I gravity feed fuel from a burp can into the fuel bowl of the carb... But as soon as I put it on the fuel pump from the tank, it idles EXTREMELY low and smokes a little. To me, this indicated that the carb itself was running rich. I adjusted it a little on the LT300e, but I could never seem to get it right, it still will slowly die at idle when warm, but ironically if I CHOKE the motor, it'll start up and run. I dont know if this is because the RPM increases? But the quad will run around the yard great at RPM and then die at idle.
Now, the LT4WD. I ended up with a faulty fuel pump for my second (I think the spring isn't seated inside as I can hear one rattling around) so when I installed it it WOULD NOT pump fuel. So I ended up swapping the LT300 pump onto the LT4WD. Boom, pumps fuel. I put it all back together and got my tires on. I ran it around my yard and it exhibits the SAME symptoms as the LT300e! It will run around at RPM, but it will not stay running at idle, it drops realllllly low RPM and will start smoking a little as if its running rich. Again, when I ran it with the fuel pump OFF I didn't have this issue.
In my head I'm thinking it would be a mixture screw OR float issue... But the mixture screw doesn't seem to help me on either, and the bowls are not over flowing (I checked both overflow lines). Is there something I'm missing here thats obvious? Is there a vacuum line or something I missed? Maybe some configuration or something I missed? I reviewed the manual and nothing stood out to me.
Conclusion: Two different Suzuki fourwheelers, two different carbs (Both are chinese Ebay carbs) that BOTH run well when I mainline fuel from a drip can INTO the bowls, BOTH do not keep idle and seem to run extremely rich as they run great at RPM but slowly die at idle. Adjustment screws, idle screws be damned.
I ended up ordering a new Suzuki OEM fuel pump for ~90$ just to have it and see if it makes a difference. Any advice here though would be SUPER appreciated!
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By Gwbarm
It seems every ATV i look at to buy used has no title, does everyone loose there title, or do they change hands so often the title is lost in the shuffle. The ones that do have titles are triple the price. I am new to buying used quads is this pretty standard procedure.
I know all quads are good and tough but thought it might be good to hear opinions as to what member think is the best, from your experiences.
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By afa913
Do the small 50cc's have a way to set the speed. Im wanting to get one for my kid and i need to set it to go slow. I know the chinese knock off fourwheelers do but i dont really want one of those
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By STLJ
Hope everyone is having a great weekend,
While riding my quad just quit, I mean dead. No life on the dash, no crank and obesity no start.
Had a quick look under the plastic, batt reading 12.7v power at the key switch.
Changed the power pack, still no luck.
Anyone else have similar problems?
I don't see a fuse box/panel, is there fusible links in the system? If so where di I start looking?
SK
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By mikehallbackhoe
I just purchased a new kymco 270, and I absolutely love it. I was reading about the break in procedure, and thought it was overly cautious, but then I got to thinking and the reason they are so cautious is the carburetor is too lean because of emissions. I am in california and our smog laws are the worst. first thing I did was remove the cap that prevents you from adjusting the idle mixture, and that made starting much easier, I don't even need the choke. then I changed the 108 main jet to a 115 and it really runs a lot better. the carburetor is easy to work on, you don't even have to take it off, it can be twisted enough to reach everything pretty easily. the idle mixture screw is not slotted, but I was able to adjust it with a pair of tweezers. the dealer made the changes to the transmission for me, so all I had to do was screw out the throttle limiter, and this quad runs great. I have tendonitis and the thumb throttle bothered my wrist, so I put a twist throttle on it. other than that, I plan on keeping it stock, it does everything I could want.
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