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2001 Shadow Spirit - Dunnellon, Fl
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Discussion Starter · #1 ·
Can someone help answer a question about pilot jets? I bought a 2001 VT750DC a year ago. The only mod I have found is the exhaust, which appears to be similar to the Cobra 2 in. Slash Cut Drag Pipe Exhaust System. Can't find a name on the pipes to know for sure. The bike ran ok but seemed to be a bit sluggish. This past Oct it began having starting issues. Did some troubleshooting and decided to rebuild the carbs. They were nasty and had crud in both bowls along with a stuck float in front cyl carb. While cleaning them I found that the main jets are 105 and 108 per specs but the front cyl carb has a #48 pilot jet and the rear has a #40S pilot jet (might be wrong about which one was in which (beer)). Everywhere I have researched references using the same size pilot jet for both carbs. Anyone know why someone would have used 2 different size pilot jets?
 

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Registered
2001 Shadow Spirit - Dunnellon, Fl
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20 Posts
Discussion Starter · #6 ·
That 40S size is strange. Does it look like they were opened before? Maybe an aftermarket jet as many different companies sell jets with different size markings.The factory Keihin jets have a K which looks like a star pattern.
One manual I have shows this. See if those are your carb numbers
Swifty: Someone had definitely opened them before. I even found what looked like gasket material (from a tube) coating the bowl edges and seals. The carb is the VDF2D model. The pic shows what was in there.
284253


My first guess would be a box of mixed jets and bad eyesight.
My second guess would be to cover up the symptom of a lean situation with the one cylinder, probably actually caused by an insulator/boot leak.
CSRoad: The more I think about it you may be right about someone trying to cover up another issue. Looks like someone tried a couple of cheap fixes without spending any real money.

I think I will order a standard rebuild kit with a pair of 40 slow jets and go from there. Then I can order a separate pair of 42 slow jets if needed because of the aftermarket exhast. I will definitelty check the boots and air connections for leaks. It just threw me off finding 2 different size pilot jets when all research mentions using the same size in both carbs.

Thanks for the feedback! ?
 
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