919 fueling - Wrist Twisters
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post #1 of 8 Old 08-05-2019, 11:47 PM Thread Starter
Tirone
 
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919 fueling

Hi all.

Wonder if there is an easy fix for jerky throttle a low revs on my 919 2003. All standard apart from Bewolf end cans and flapper mod.

I hear a Power Commander remap will help but is an expensive option. 450 😞 Has anyone any thought of booster plug? Supposed to help with this by increasing the fueling ratio by a tiny amount. Not looking for more power by the way.

Do the standard map make the fueling lean or rich?

Confused

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post #2 of 8 Old 08-06-2019, 01:41 AM
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What is a booster plug?

I know of 3 ways to do this:
1. PC-III
2. 17/44 gear change
3. cam driven throttle system.

3 is probably the cheapest IIRC. Basically it's a new throttle that has a cam in it that controls how fast the throttle moves as you twist it.

Here's one example, but I think there's another one that someone here has used. I didn't see the 919 listed, but same idea. Maybe they even have a custom one where you can trim down the cam. The idea is to make the movement longer at the start and normal after that by using a cam that the cables ride on.

https://www.motionpro.com/c/rev2-throttle?v=6976


I did number 2 and I'm not a big fan of the lost torque, so I'm thinking I'd rather go to 16/44 gears and PC-III.

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post #3 of 8 Old 08-06-2019, 02:24 AM
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My bike had terrible fueling issues at low speed when I first brought it.
Two things fixed this.
A Power Commander and a starter valve synchronization. Smooth, predictable and consistent now.

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post #4 of 8 Old 08-06-2019, 02:47 AM Thread Starter
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This thing is supposed to help a lot. A few people say it works well.

https://www.boosterplug.com/shop/cms-21.html

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post #5 of 8 Old 08-06-2019, 08:30 AM
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Quote:
Originally Posted by aspect1968 View Post
This thing is supposed to help a lot. A few people say it works well.

https://www.boosterplug.com/shop/cms-21.html
Adding another variable resistor inline with your temp sensor is unlikely to do much more than waste your money and possibly add some hp on the placebo butt dyno.
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post #6 of 8 Old 08-11-2019, 08:16 PM
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I'm one of the people that hasn't had a problem with their low/idle fueling since replacing the throttle cables (previous owner crash damage), adjusting them properly and using proper throttle technique. -shrug- Mine is an early production 2002; stock exhaust, someone did the flapper mod before me, etc.

1986 Honda Nighthawk 700S
2002 Honda 919
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post #7 of 8 Old 08-11-2019, 09:04 PM
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I think throttle control plays a big part. The 919 has a very sensitive throttle.
I've also found at low speeds it helps to be slightly on or off the throttle not steady. Even just a tiny amount of input but constant can smooth things out.
On or off the gas.
Also try not going slow!

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post #8 of 8 Old 08-11-2019, 09:18 PM
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Quote:
Originally Posted by Islandboy View Post
Also try not going slow!

Yes, but then how am I to stalk pedestrians in the parking lot or on the sidewalk? :P (Seriously, with the stock exhaust the 919 is quiet enough to idle along behind pedestrians in public areas and they don't notice until you rev the engine or hit the horn.)
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