Question about 2002 Harley Davidson FXDX Dyna Super Glide Sport

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I have a custom Motorcycle S&S 113 with Thunderheart controller and super G carb. When Bike is warm (10mi. or more} at 4k rpm bike will, under acceleration shut down like flipping a switch. Back off the throttle and continue on run up to 4k and same thing. Tank is clean and fuel screen is clean. Whats up??? Also can simulate in garage, just roll throttle up to 4K and bam.

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Blocked jet

Posted on Sep 06, 2009

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There is a 2 second hesitation in my throttle when trying to accelerate to 2nd gear. Possible solutions?


Clean the carb plus check for intake leaks.
checking for intake leak warm your bike up take a can of WD40 while the motorcycle is running spray with WD40 with the nozzel attached around the carb joint/manifold if there are intake leaks the engine rpm will change then you will know you need to replace the o-ring or gasket or carb manifold/carb joint.

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The bike sat for maybe 5 or 6 years.when I bought it it had 800 M on it so there could be a carb issue.Ive had it to a local repair shop and the triumph dealer I bought it from to try to get the problem...


I have never seen heaters on motorcycle carbs. Your carbs do sound like they have issues with the low speed *(or idle) circuit.

You could take the carbs off the bike and have them soaked in cleaning solvent and reassembled. This should do it. Did anyone at the dealer or repair shops do a complete carb overhaul/cleaning?

You shouldnt have to run the choke for more than a couple minutes under most driving conditions. Of course, factory carb jetting is almost always excessively lean. You can go on Ebay and get a Dynojet stage one jet kit for your bike too. Improved driveability with only a modest reduction in fuel economy. Cost about 90 dollars.

Good luck and be careful!

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1 Answer

My 2009 Dyna Super Glide Custom motorcycle has had an unusual amount of vibration overall when under way while accelerating or deaccelerating through 2nd, 3rd, and 4th gears. It seems to me to be either...


You can check for a loose or broken motor mount but you need to consider how the rubber mounts work. The mounts absorb high frequency vibrations. Low frequency vibrations will be felt throughout the machine.

On most Dyna's, the bike vibrates when idling. When accelerating though the gears (and decelerating back down) if the engine rpm's gets below about 2000 rpm's, you'll feel the vibration. Once above this level, the bike smooths out due to the change in frequency of the vibrations. I have owned a '94 FXDWG since new and this is my experience with the bike.

However, if the vibration is very bad, you may need to have it looked at by a technician. You'll have to determine that for yourself.

Oct 08, 2009 | 2001 Harley Davidson FXDX Dyna Super Glide...

1 Answer

MY IDLE RAISES AFTER BIKE IS WARMED UP


all motors do this, its normal. once the bike is warmed up then set the idle where you want it.

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I just purchased a 94 Katana 750cc -- sort of a project bike. The bike has just under 13K miles and the previous owner stated that he had only put about 500 miles on it, in the last 2 years. When I first...


Sounds like it sat allot.. That causes problems with the carbs.. I would say it runs pretty good for sitting so much.. I would suspect the carbs need cleaning.. or maybe rebuilt,, jetted and synced.. Try some carb cleaner and work you way up from there..

Rate well ;o)

Jul 24, 2009 | 1994 Suzuki GSX-R 750 WR

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Runs fine until bike warms up then misses


your cdi unit is suffering a from power surge try to check the output power if it is stable.

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1 Answer

Wiring mod done


I am the proud new 2nd owner of a red 2000 Mille. Love the bike always wanted one deal of a lifetime came up so I bought it. The bike has 18,000 miles on it. I checked the wiring from the stator/alternator and it has been upgraded to 12 gauge wire from the stator to the voltage regulator. BUT, the wiring mod had not been done, so I thought, great!, I'll do the mod myself. Went home last night and ran 2 12 gauge wires from the red black wires at the connector to the 30 amp fuse. I didn't cut the old wires, just spliced two new ones in, as per bossbobs directions. Then I ran 2 12 gauge wires from the red blue wires at the connector to the battery negative. Turned on the bike, and I had 14.54 volts at the battery...WOO HOO!! couldn't check the 4k rpm voltage as it was late and the bike is loud. Went for a ride this morning, checked the voltage before the ride and it was 14.5 at idle and 14 at 4k rpm. NICE! went for a 15 minute ride and checked the voltage when I got home.... 12.5 at idle and 12.1 at 4k rpm....DAMN IT!! I take it this is a heat issue. The regulator gets hot to the touch, but not so hot that you can't touch it...yellow wires from the stator aren't warm at all... before the wiring mod, I had approximately 13.2 at idle and 12.5 at 4k rpm.... tired voltage regulator I hope????, cause I want to get bikepainter's upgraded aftermarket regulator.... Could everyone give me your input please??? not a very good pic of the new beasty,If you are using the on board indicator it's not very acurate. Also these bikes are know for big variations in voltage at anytime. I was told this by David at Acumen in the UK. I check this myself vs the voltage changes on a 2000 Grand Prix. I hooked the acumen voltage reader to the Prix and it stayed at 14.4-14.2, at idle and higher rpms. On the Futura I've seen readings from 17 volts to 12 volts. If you aren't having any electrical or starting problems, don't sweat it. ,,,

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