Question about Choke on a Honda City Fly

[cicatrez]

Does anyone have one? Mine never came with a manual etc..
I think I've found my choke as I can notice a change in revs/pitch when its idling.
Now, it seems to be a lever, that moves from (imagine the hands of a clock).

9pm the choke is closed/off
7.30pm the choke is in between
6pm the choke is fully open..

now, i went for a ride with it in between. Came home, and experimented with the bike stationary on idle. Having the choke at 9pm, it idles very quietly, but opening the throttle and the bike will just conk out. And will not start even when using some throttle to aid it...

Having it at 7.30pm it will start with abit of throttle.
at 6pm it will start easy with a push of the electric start. (but leave it to warm up for 1minute before deciding to use some throttle otherwise it will conk out).

I just feel abit concerned that it the bike doesn't like the choke being at 9pm? seems odd that with it closed, and with some throttle it would conk out. or maybe I'm doing something wrong.

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'02 Honda City Fly

[rotax81]

the choke on a 2 stroke is generally just to start it from cold.
then its choke off and off you go.
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ZX636C6F road. ZX636C1H track. ZX7R redundant. ZX0.5R minimoto as ornament.
Audi A4 Avant 1.9TDi and VW Transporter 2.5TDi 888 Special (no mot and tax lol)

[Charlie]

A cityfly is a 4 stroke though, I never found it worked at all well on mine (or ever worked at all on hornet), and remember managing doing 10miles with the choke on wondering what was wrong with the bike, whoops.

I can't remember which way it was now. Go out for a ride and while going a long at a bit of a pace, reach under and change the choke to figure out which is on and off, should notice it from what the engine does.

Takes a bit of practice to reach under the tank to get to the choke (while riding) but you soon get the hand of it with winter gloves on.
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Past: Honda x8rs, Honda City fly, Honda Hornet 250, Honda VFR750, Yamaha xt600e.
Current: Honda CBR929RR & Yamaha XT660Z Tenere

[cicatrez]

maybe the carbs need a clean? I don't know, I'm just making up things lol
seems odd that it can only handle idle on (what I'm guessing) is closed choke
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'02 Honda City Fly

[Charlie]

Even on the coldest of mornings my hornet won't idle with the choke on. Nothing to worry about really, the bike will be running rich and but the choke on will just be making even more rich causing it to conk out.

Might be worth posting in the Workshop instead, probably get more help
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Past: Honda x8rs, Honda City fly, Honda Hornet 250, Honda VFR750, Yamaha xt600e.
Current: Honda CBR929RR & Yamaha XT660Z Tenere

[cicatrez]

Right, well here's a picture of it, if it helps in any way...

As said before, at 9pm, it idles very low, any bit of throttle and it just cuts out.
When its in the middle, it starts with abit of throttle. When riding, if you open the throttle fully it does blurb and struggle a tiny bit.
at 6pm (all the way down) it starts easily, and revs freely on full throttle.

Any ideas?

https://i227.photobucket.com/albums/dd33/cicatrezz/DSC03990.jpg
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'02 Honda City Fly

[Kal]

Same as the CG;
Full choke for starting
Partial choke for warming up
No choke for normal riding.

Needed to be clearing snow off of the bike before I needed anything other than no choke though.
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Kal...
I Like To Hoon It Hoon It I Like To Hoon It Hoon It I Like To Hoon It Hoon It Ya Like To (HOON IT!).
1984 GB250 Clubman,1983 CB250N Superdream, 1999 GPZ500S

[cicatrez]

ok.

But now the issue is it cutting out with no choke. As mentioned, with no choke it idles very low, as if its just able to stay alive. any use of throttle, the bike doesn't like it and just cuts out.

What could be the case here? SOmething clogged or need cleaning?
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'02 Honda City Fly

[Charlie]

You could turn the idle speed up, there is a screw I think on the other side of the carb, it will only need adjusting slight, adjust it as you need. I have totally forgotten how to do any maintance on that bike
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Past: Honda x8rs, Honda City fly, Honda Hornet 250, Honda VFR750, Yamaha xt600e.
Current: Honda CBR929RR & Yamaha XT660Z Tenere

[rotax81]

[baldy]

That carb looks like the same as my pit bike. Up is on, the middle is half and down is off. You should only use full choke for a few minutes then swap to half choke and ride off. After about 5 mins, turn it off and don't use sudden large throttle openings untill it's fully warmed up or else it will just bog down and cut out.

I have to do this every day on my 400. You shouldn't need to use full choke unless it's really cold or the bike has been stood for a while.
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One day i will rule the world, just not today.

[cicatrez]

thanks Rotex. I will give this a try tomorrow. I'll be going for a ride in the morning. I've not used the bike for any long distances yet, the most probably being for about 5road miles in 30mph traffic for around 30min. I can't really much tell the difference with it when its warm or cold, aside from slight sound in the exhaust, and once warm gear changes, etc feel all smoother.

I must admit, ive never really sat it stationary to warm up for more then about 5minutes. Tomorrow morning I'll give it a good 15minutes to warm up. Everyones different, some people say warm it up, others say, ride it gently until it warms.
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'02 Honda City Fly

[rotax81]

as long as the motor is not cold when you try and set the carb then it will be fine. even 5 minutes running will do
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ZX636C6F road. ZX636C1H track. ZX7R redundant. ZX0.5R minimoto as ornament.
Audi A4 Avant 1.9TDi and VW Transporter 2.5TDi 888 Special (no mot and tax lol)

[craigs23]

The mixture screw won't have a big effect at mid-high rpm, it's mostly useful for idle speeds.

Start with the basics - first things first, how's the engine burning? Whip the plug out and have a look at the condition, should tell a little of how the bike's been running after a ride. Also check that you're getting a decent spark and the air filter is in clean.

Also check that the choke mechanism is actually working - mine's notouriously useless despite being in reasonable working order. All the way up is okay for starting, but will kill the engine after a couple of minutes. Half way will allow the engine to idle from cold, but will bog when riding at bigger throttle openings. All closed is as it should be.

I recently serviced my carb and adjusted the needle height - I found that a slightly richer mixture throughout the range gives better running in these colder conditions.

[cicatrez]

yeah, I was wondering it can't be much due to the idle, as it just conks out with choke off (normal) when throttle is used.. So there must be something poorly adjusted or clogged etc..
on middle choke however it seems almost fine.
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'02 Honda City Fly

[Kal]

[cicatrez]

Oh ok cheers kal. I cleared this up with my old man earlier. No problem with the bike starting
Thinking about whether I should go for a bike ride right now or not... What you reckon? yay nay?
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'02 Honda City Fly

[prawny1]

the chokes on these sort of carbs are basicly just a big flap, imagine trying to rev your bike with a hand over the carb and you will get what the choke does.

At nine o'clock the choke will be pretty much verticel with a second flap or hole in the plate, at six o'clock the flap will be pretty much horizontal.