Question about 2003 Harley Davidson FXSTB Night Train

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High Idle on a 2007 Night train

Got a new 2007 Night Train and it works fine BUT it has rpm like a japs. Is there a way to adjust the idle to really low ? I know that the high Idle is a sort of adjustment to create more power to the battery. but hey, I'm standing still as little as possible so the battery will be charge anyway. Or changing to a carb, would that work ?

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The engine needs 950-1050 rpm's to properly charge the battery and supply enough oil pressure. Lowering it can effect both and is not advisable to do. There;s a small window to play with but it is better left at factory specs. As far as FI injection to carb, it can be done but at a cost and the same applies to idle speed there, just a bit more of a window because of no fuel pump drawing from the system.

Posted on Nov 20, 2008

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Posted on Jan 02, 2017

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1 Answer

Ok I got saw running good fast but won’t idle?


the sequence to throttle adjustment is to adjust to high speed first ( screw closest to the air filter) turn in in or out until it fires evenly at rpm and picks up rpm easily
now hold the throttle at full throttle and slowly idle down while adjusting the idle screw ( closest to the butterfly) to maintain engine running
the screw should have been turned all the way in then back out 1 1/2 turns before starting the engine
keep slowing the engine while making very small adjustment until it idles at rpm slow enough that the chain is not driving
If you get it low but it stalls out , then adjust the throttle stop screw to maintain idle rpm
Correct adjustment is from this point the rpm increases rapidly with out falter ( fine tune high speed screw to achieve that)
and when left to idle will do so evenly without driving the chain
all of this working is depending on the carby having new diaphragms , needle height adjustment correct and the system cleaned out

Apr 11, 2018 | Fast Garden

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Idle speed for Kia Rio 2007 is 1600 RPM. How do I reduce this to normal 750-800 RPM?


If your Rio has fuel injection then you cannot adjust the idle speed.

The idle speed is controlled by the ECU and the Idle Speed Control (ISC or IAC) valve which is mounted on the throttle body.

You should not adjust the throttle stop screw on the throttle body - this is factory set and should stay as it is.

If you're having trouble with idle speed , then it's more likely that the ISC valve has fouled up and needs cleaning with carb cleaner.

Mar 31, 2018 | Kia Cars & Trucks

1 Answer

Cranks but wont start


  1. Body
    • The 2003 Night Train was 95.3 inches long, with a ground clearance 5.5 inches and a seat height of 26.8 inches. The Night Train had a wheelbase of 66.7 inches. The bike's dry weight was 672.4 lbs. The Night Train featured a steel double cradle frame. According to the Bikez Motorcycle Encyclopedia, customers had a choice between gunmetal pearl and vivid black for colors on the Night Train. It supported two passengers.
    Engine
    • The engine on the 2003 Night Train was a 1,449 cc transverse-mounted air-cooled four-stroke two-cylinder engine with a compression ratio of 8.8-to-1. It has an overhead valve system and two valves per cylinder. The maximum torque on the Night Train is 78.2 foot-pounds at 3,200 rpm. It has a maximum power of 62.54 horsepower at 5,300 rpm. The bore and stroke on the 2003 model is 3.8 inches by 4 inches. The maximum speed on the Night Train is 105.63 miles per hour, and it goes from 0 to 60 mph in 6.9 seconds.

    Other
    • The Night Train has a carburetor fuel system. The fuel tank on the Night Train has a maximum capacity of 5 gallons. It has a five-speed manual transmission with belt final drive. The Night Train features a wet multiple-disk clutch that is cable operated. The front suspension on the Night Train is a cartridge suspension that has a travel of 5.08 inches. The rear suspension is a mono shock swing arm with a travel of 4.06 inches. The brakes on the front and rear are 11.5 inches. Both the front and rear brakes are a single disc.

Jan 17, 2013 | 2003 Harley Davidson FXSTB Night Train

1 Answer

I changed my dead battery on 05 night train....starts fine and seems to run good for about 15 minutes....then wants to die with very low idle at a stop..or slowing down


Hi Redmiston64, on the right hand side of the carburator there is an idle adjusting screw with a spring behind it, turn screw clockwise to increase idle counter clockwise to decrease idle. There is also an air/fuel mixture screw inside a carb body lug that may or may not be plugged with an aluminum cap that's about 3/16" thick. This cap can be drilled out to acess the air/fuel mixture screw. Turning screw clockwise will lean out mixture and lower idle, turning screw counter clockwise will richen mixture and raise idle. You need to balance the two adjusting screws to obtain an idle of 950-1000 RPM then back out air/fuel mixture screw 1/4 turn, snap throttle to confirm responce, you may continue to back out air/fuel mixture screw untill desired throttle responce is achieved, if you see black smoke coming out of exhaust you have gone to far and need to turn screw back in 1/8 turn at a time. Good luck.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

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Most bikes are in the 1000rpm range unles they are 2 stroke (some small Aprillas etc.), dont always go by the tacho meter, you can usually hear if the bike is idling too high or too low and idle adjustment is usually fairly easy once you find the adjuster screw.

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1 Answer

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You have to take it into the dealer and have them adjust your idle with the digital tech, thats the only way to set the idle on these newer injected bikes.

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