DNA180 corner

[stroker]

:pray:

[spy622]

Originally posted by stroker@Dec 16 2006, 06:28 PM

:pray:

excuse me hot run rich cold run lean or it the other way round??...suddenly slip off my mind when my ride started coughing during the weather changes recently

[njh]

My spark plugs have been changed less than a month ago.

 

I just got my bike back from the workshop yesterday night, was told the fuel pump is not working properly as a result it cause not enough fuel to be taken in so causing the engine will cut off.

But after changing, on my way back home the engine die on me again.

[danielburgess]

Too much fuel in the fuel-air mixture is too rich, and not enough fuel is too lean. So, after wet weather, since the air is colder and thus more dense, the stoichiometric air to gasoline ratio will change from the normally standard 14.7:1 and the ratio would have a higher difference.

 

Normally I find that in cooler and wet weather my DNA and Bandit both felt alot better with pick up, and of course that idea that the engine is running alot cooler!

 

Cheers!

[danielburgess]

Too much fuel in the fuel-air mixture is too rich, and not enough fuel is too lean. So, after wet weather, since the air is colder and thus more dense, the stoichiometric air to gasoline ratio will change from the normally standard 14.7:1 and the ratio would have a higher difference.

 

Normally I find that in cooler and wet weather my DNA and Bandit both felt alot better with pick up, and of course that idea that the engine is running alot cooler!

 

Cheers!

[danielburgess]

The DNA has a fuel pump? Hmmm, always had the idea only cars or bigger vehicles uses a fuel pump. Anyway, have you tried changing fuel filters? You might have a dirty one, or you might have a dirty carburetor. Sorry dude, but I am just taking pot shots.

 

Cheers

[spiderman]

Originally posted by danielburgess@Dec 17 2006, 09:08 PM

The DNA has a fuel pump? Hmmm, always had the idea only cars or bigger vehicles uses a fuel pump. Anyway, have you tried changing fuel filters? You might have a dirty one, or you might have a dirty carburetor. Sorry dude, but I am just taking pot shots.

 

Cheers

yup dna have a fuel pump and its operated by the suction of the engine too, using vaccum to turn it... so far i see 4strokes normally have fuel pumps... i might be wrong

[michellechia]

hi guys

yea i rem got one skipper blastin away at traffic light...the pipe is the same as when daniel sold it to me. no change. only new bracket. well, the dna is very fine, smooth... and what can i say ? thanks to daniel for taking such good care of it... i m doing my best to maintain it well. which means spending money on it of course!!! oh to njh i m sorry to hear that your bike is giving u probs. if the boys at the forum are too busy for you, you may wanna see kenny at Future Scooterg he is very reliable and honest, i m sure he will fix your probs, jus make sure u do your belt change and etc there, he will take care of you. he and his friendly mecs have taken good care of my bike. he will bill you reasonably, but the most impt thing is he will MAKE SURE the prob will not happen again.

[michellechia]

oh forgot to mention, i got hella horns on it now.it uncovered right below the head cowling. bloody loud! hahaha, so happy horning away!!!! put the as&ho%e# back on their lane! its so so loud!!!hahaha...happy me.

[danielburgess]

If I am not wrong the intake stroke of a 4 stroke engine like that of a DNA has enough vacuum to cause suction of fuel without the help of a fuel pump, where is stroker! Correct me if I am wrong please.

 

My old DNA is still working well! I am so bored at work!

 

Cheers

[njh]

Carb has also been washed, maybe could go and get the fuel filters changed and see how it is.

 

I have been sending my bike to future scootering for all the problems all this while.

 

I've just got hella horns installed too, got a cabby jump out of his seat when he wanted to turn out of a minor rd w/o checking that i was coming.

[stroker]

Originally posted by spy622@Dec 17 2006, 01:57 AM

excuse me hot run rich cold run lean or it the other way round??...suddenly slip off my mind when my ride started coughing during the weather changes recently

Yup. That's correct dude. Hot = Rich; Cold = Lean. Cheers!

[stroker]

Wow, seems like HELLA is THE WAY to go boys!!!! Keep it up! but don't frighten old farts like me on an old, lousy cubkia ok??? Heart can't take it...

[stroker]

Originally posted by danielburgess@Dec 17 2006, 09:02 PM

Too much fuel in the fuel-air mixture is too rich, and not enough fuel is too lean. So, after wet weather, since the air is colder and thus more dense, the stoichiometric air to gasoline ratio will change from the normally standard 14.7:1 and the ratio would have a higher difference.

 

Normally I find that in cooler and wet weather my DNA and Bandit both felt alot better with pick up, and of course that idea that the engine is running alot cooler!

 

Cheers!

Very nice explaination dude.

[stroker]

Originally posted by spiderman@Dec 18 2006, 01:46 AM

yup dna have a fuel pump and its operated by the suction of the engine too, using vaccum to turn it... so far i see 4strokes normally have fuel pumps... i might be wrong

Most scoots (2T and 4T) have fuel pumps. Cos of the placement of the fuel tank. Which is usually placed low in FRONT of the engine and not ABOVE the engine. Thus gravity-fed fuel system doesn't work here.

 

Spy mentioned his scoot's fuel pump went south and thus got me thinking. :thumb: for spy

 

Yeah, anyway, most 4T bikes has got fuel pumps. In fact, even most cub kias use fuel pump these days too.. As a result, I had to removed the fuel pump on my bike as its not flowing enuff petrol for the carb of mine. Of cos gotten a fuel tap installed. Damn.

 

Cheers

[stroker]

Originally posted by njh@Dec 18 2006, 10:53 AM

Carb has also been washed, maybe could go and get the fuel filters changed and see how it is.

 

I have been sending my bike to future scootering for all the problems all this while.

 

I've just got hella horns installed too, got a cabby jump out of his seat when he wanted to turn out of a minor rd w/o checking that i was coming.

Yup. Fuel filters need to be changed REGULARLY. They're cheap. So change them periodically. Especially if you're a regular at the jb gas stations.

 

Cheers

PS: forgot to mention fuel filters are the usual cuplrits of fuel starvation (cutting out at high speeds). So get it changed first b4 slurging on a new fuel pump. If your fuel pump is spoilt, chances are you can't even start yr bike. No/ very little petrol will flow tru. They're mechanically based and seldom spoil.

[GAiNAX]

hi, anyone noe where to get or download the manual for the bike?

[stroker]

Originally posted by GAiNAX@Dec 18 2006, 05:07 PM

hi, anyone noe where to get or download the manual for the bike?

User manual? Part manual? Or workshop manual?

[specialc]

Originally posted by njh@Dec 17 2006, 10:20 AM

My spark plugs have been changed less than a month ago.

 

I just got my bike back from the workshop yesterday night, was told the fuel pump is not working properly as a result it cause not enough fuel to be taken in so causing the engine will cut off.

But after changing, on my way back home the engine die on me again.

I had the same problem last time...but checked thorugh...change spark plugs alright liow......it dies on me at every traffic lights. After that, difficult to start.

Anyway, how do they know it is the fuel pump? How did they trouble shoot. My advice is...if the mechanic is not competent...move on to the next.

[GAiNAX]

Originally posted by stroker@Dec 18 2006, 07:50 PM

User manual? Part manual? Or workshop manual?

hmm...got so many ah? lol, which is important?

[njh]

Originally posted by specialc@Dec 18 2006, 08:29 PM

I had the same problem last time...but checked thorugh...change spark plugs alright liow......it dies on me at every traffic lights. After that, difficult to start.

Anyway, how do they know it is the fuel pump? How did they trouble shoot. My advice is...if the mechanic is not competent...move on to the next.

I wasn't around when they did on my bike, as i left it overnight. What i was told is that they took everything apart and wash and tested every individual part.

When i went back the next day, one of the mech went to test ride and he encountered the problem also. Then he told me is that bcos the fuel pump is not workin properly, so when travelling far and fast not enough fuel is pump back fast enough causing the engine to die.

Went back again yesterday, was told it might be a spring at the carburetor that takes a while to spring back rather than instantly causing the fuel to be supplied unevenly.

[danielburgess]

sounds like first class bike shop BS to me!

 

Cheers

[njh]

BTW the shop i went to is Future Scootering.

I thought they have a rather good reputation?

[stroker]

njh dude, pm sent!!

[danielburgess]

Future is very reliable as I heard that my ex bike is being done up from time to time from the people there so I see no problem going to them, tot you went to those in the middle of bukit panjang or bukit batok kind of bike shop!

 

Cheers