Re: Yamaha FZ-16/ FZ-S

When I'm tilting my bike towards the left,petrol is dropping onto the ground,from the A/F screw.plz see the attached pic.the petrol is reddish in colour. After 2 tankfulls with SystemG,had told the service guy to clean the carb,but I doubt whether he had actually done it or not. Why should this happen? Is this the remains from the carb drain area?

Sent from Samsung Galaxy Note II

Re: Yamaha FZ-16/ FZ-S


buddy if u r referring to the brownish screw in the pic then its not AFR screw. its the drain screw. tight it. as far as i know AFR screw is behind the accelerator valve (one one which rotates when u move your. accelerator). is the petrol dripping from there or the brownish screw u shown in the pic?

Re: Yamaha FZ-16/ FZ-S

That is the drain screw. Petrol draining when tilting the bike to left is normal. It is coming out from the carb over flow tube.
Check where the fuel overflow tube is pointed. The red color is not normal. Is it due to the additive? Add the additive to normal petrol and check if it changes color. Else looks like the carb needs cleaning.

Is it leaking even when parked on the center or side stand? If yes then it is a different scenario. I had this issue on my bike.

Re: Yamaha FZ-16/ FZ-S

Guys, how often is the carb to be cleaned or serviced? Havent cleaned the carb since the time i took my ride

Cheerz!!

Re: Yamaha FZ-16/ FZ-S

Most lazy mechanics would say carbs needn't be touched until noticeable jerks or drop in mileage.It is recommended to clean atleast once in every 3000kms(preventive maintenance mate). The AFR and idle need not be touched though.Get your carb cleaned if you haven't done in a while. It helps!

Re: Yamaha FZ-16/ FZ-S

The main issue with such nerd mechanics is that, they don't bother to do the job with care. And once the bike is left (for working lads) at the SVC, you never know whether they will do it or not

Hope to stand on their head and get it done with a smile

Cheerz!!

Re: Yamaha FZ-16/ FZ-S

You need to clean your carburettor and also get the screw checked. Most likely it has not been tightened properly.

The red colour is due to oxidation with the exposure of the fuel to air.

One doesn't have to clean the carb every 3000 kms unless the quality of fuel is so bad that one has no choice but to overhaul the engine and fuel system all the time! Ideal preventive maintenance will be around 10-15,000 kms. The good SVCs are usually equipped with Carburettor cleaner sprays and have the know how of how to dis-assemble and put things back up in the correct order. Usually mechanics refrain from such a job as it is a bit of pain and also if for any reason they goof up then the owner may face severe problems of bike's mileage going down compared to the earlier state when it was not touched.


Cheers,

Re: Yamaha FZ-16/ FZ-S

[MENTION=32641]shv18[/MENTION]... Thanks for the info. I usually make a point to fill from good pumps.

Cheerz!!

Re: Yamaha FZ-16/ FZ-S

you said it right. Had a lot of bitter experiences which resulted in me learning to clean the carb myself by watching mechanics clean it. Trust me each mechanic has his own way of doing it. An elderly mech is far different from younger mechanics. Whew!!! It is not that difficult. Only drawback is I do not have an air compressor to blow the dirt off jets. Planning to get a 12v equioment soon.

Re: Yamaha FZ-16/ FZ-S

Then definitely the fools at svc hadn't cleaned the carb. Would check it out and tighten the screw myself.Nobody ever touched that screw..this happened once before as well.It does not happen when the bike is on side stand.I tilted my bike to the extreme left yesterday and it started dripping.hence I was worried. Is it advisable to go to a local mech for cleaning carb? Or can I do it myself? 9100kms run and the carb is untouched. :banghead:

Sent from Samsung Galaxy Note II

Re: Yamaha FZ-16/ FZ-S

Petrol is dripping from the brownish screw. All this while I thought it to be the afr screw,as it had been pointed out in some diagram on the net. :banghead: I'm getting a bit less mileage,can I fiddle with the afr myself?

Sent from Samsung Galaxy Note II

Re: Yamaha FZ-16/ FZ-S

Yes. You can tighten the screw yourself. Clean the screw area and see if it reappears. It is sad to hear people having bad experiences with service centers. This behaviour of ASC is common. What I understood from my experiences is that they encounter lot of bikes everyday. When you narrate your problems of your bike, it is being cascaded from service advisor who narrates his version of problem to workshop supervisor who in turn instructs his team who actually touch the bike and get down to work. Everybody in this chain have their own experiences, ego and solutions. So unless you speak to down the line guy it is impossible to get special attention. Of course they have a job sheet tied to every bike but....... This is one big advantage you have with reputed local mechanics with whom you can argue, demand and witness the job done.You will need necessary tools to clean carb yourself. There are lot of tutorials in this forum. I am not convinced with the carb cleaning interval of once in 15000kms. Even if one rides the bike for 40kms per day it is like cleaning carb only once in a year??? I dont think the quality of fuel is so good even if you pay the premium. I suggest you refer your last few pages of maintenance schedule in your owners manual.Moreover it is the owner's choice of maintenance. I clean the carb atleast once in every 2oil changes, that would be'around once every 4000kms or once every 3months. I never allow my bikes to reach its threshold. Most importantly do not touch the AFR settings if you have power and mileage in order.Keep us posted!

Re: Yamaha FZ-16/ FZ-S

Its better I take my ride to the service centre and blast the guys for improper work on bike. I would be there to inspect the work done.
Sent from Samsung Galaxy Note II

Re: Yamaha FZ-16/ FZ-S

yes of course u can. but i advise u to do only if your bike is not new means at least 2k kms on ODO.


http://www.xbhp.com/talkies/universal-threads/9770-ut-tuning-your-motorcycle-carburettor.html


also i personally tried many combinations so the optimum tuning lies between 2.75 to 3.15 turns not more than that.

Try to keep the tuning to richer side than lean....its better to lose some fuel than screwing up your engine for leaner mix ( more mileage )



i suggest if u feel that u have screwed up then keep the tuning to default state which is 3 turns anticlockwise from leanest position

Re: Yamaha FZ-16/ FZ-S

I am very reluctant to change the stock settings, atleast for engine related parts. The mechanics are not highly trained (are they trained? :banghead.

These idiots check the bikes throttle response by almost red lining it , the only thing they can say is "arey itni achi to chal rahi hai bike, aisa thoda to hoga hi" :thumbdown:

Cheerz!!