Re: Yamaha FZ-16/ FZ-S

Someone Help with this??????

Re: Yamaha FZ-16/ FZ-S

That tail logo is light from tail lamp. Air scoop logo was original Yamaha accessory, should be available at showroom if lucky. Duplicate ones used to be available at local stores.

Re: Yamaha FZ-16/ FZ-S

Hi, still am getting that jerks when I try to hard accelerate. I am already running on optimal running mixture or even slightly rich. I read the sparkplug. Is the the chain? Or some other things? Or even the sparkplug? My engine is louder compared with other fzs.

Re: Yamaha FZ-16/ FZ-S

There is a brown fuel screw just below the carburetor. Try twist it clockwise to fully close the fuel screw, i.e. Fuel flow zero. Then twist it counter clockwise 3 complete turns. Use long screw driver, twist gently otherwise the tip/needle of the fuel screw inside the fuel line can be damaged. Now check hiccups appear or not. Do switch off engine while doing. Yamaha FZ has a default setup (3turns). If you turn clockwise then the mixture will be lean. Do not run on lean mixture, the engine may be affected.

Re: Yamaha FZ-16/ FZ-S

Refer me an engine oil that gives acceleration and mileage. Struggling with Motul 5100, too sluggish.

Re: Yamaha FZ-16/ FZ-S

Guys i am facing severe lean mix problems... Already changed my valves. How to rectify the issue? Tried changing the afr screw, the svc is suggesting a full carburetor change which i do not agree since my bike is 1.5yrs old. My bike is honda shine. But that ownership is not too active..

Re: Yamaha FZ-16/ FZ-S

How old is the spark plug?
This is OT here. We can continue in the Shine thread.

Re: Yamaha FZ-16/ FZ-S

Change your setting to 3 full turns from fully closed position. Check chain slackness and you said engine is louder, that could be due to engine oil. What engine oil are you using? And how many kms have you clocked on it?


What exact issue are you facing please elaborate. And post a pic of your spark plug.

Re: Yamaha FZ-16/ FZ-S

Hi i want to know about the yamaha fz

Re: Yamaha FZ-16/ FZ-S

I have to wait for my engine to get warmed up every single day... If i try to rev it without warming up then engine dies. With half choke engine revs properly... Spark plug is showing whitish color at the tip indicating a lean mix but i can't find the cause of the lean mixture..

Re: Yamaha FZ-16/ FZ-S

Have you tried to tune the carb? And how much you have to wait each day to warmup? 15-20 secs is quite normal. Do you have to warm it up again in the same day after warming up in morning?

Tune your carburetor if you know how to do or go to a mechanic and get it tuned. If you have already done this, then change your spark plug and see. Check your air filter too.

Ps- Please post in shine thread because this is OT as Divya Sharan said.

Re: Yamaha FZ-16/ FZ-S

Recommended Engine Oil Specification is 20w40 or 20w50.
Yamaha ASC had been pouring Yamalube Semi-Synthetic 15w50 from 1st Service.
I had poured Motul 300v 100% Synthetic 15w50 after 6th Service.
During the removal of clutch-plates Yamaha ASC again put Yamalube Sporty Premium Full Synthetic 10w40, because that Yamalube Semi-Synthetic 15w50 is out of stock.

Yamalube Semi-synthetic 15w50 is very good, nice acceleration, good mileage, smoothness is also good.
Motul 300v is very thick, very very smooth, but very sluggish in acceleration and also mileage get decreased by 2-3kmpl.
Yamalube Full Syntheic 10w40 is thin oil, very responsive while accelerating and also gives good mileage of 40-42 than 38-40, but after 85-90, it tends to vibrate slightly at footpegs and drain interval is very low about 2000km.
Now in the market, Motul 7100 10w40, 10w50, 20w50 are available and they are thinner compared to Motul 300v and Motul 5100.
Should I use Motul 7100 10w40, thin oil & gives better acceleraton and mileage or stick to manufacturer recommendation of 20w50.
Need advice & suggestion. Thanks.

Re: Yamaha FZ-16/ FZ-S

Guys i think it is a carburetor problem. My bike is smooth at lower rpms & higher rpms. But is very jerky at mid range. Why this happens? With my limited knowledge, i guess the needle, main jets work fine but the pilot jet is having some issue. Any long term users / experts, please comment on this?

Re: Yamaha FZ-16/ FZ-S

Could be more than the carb. How old are the Spark plugs !!! Also check the Spark plug Gap.

I doubt its the Pilot jet ... it more of the behaviour of Carb bikes itself. When you are tuning your bike for lean/rich ... it will not always be that way across the power band. There will be areas in the power curve that the engine still runs lean and there is a phenomenon called 'engine surging'. You will feel heavy vibrations in the engine ending with a surge or spurt of power. There is this transition time for the bike to move from Mid ti high rpms and the idle circuit not providing sufficient fuel and the Main circuitry comes into play. Lifting the Throttle needle using a thin visor will help with those characteristics.

Others, please correct me if I'm wrong or missed anything.

Re: Yamaha FZ-16/ FZ-S

Hi, earlier i too doubted the spark plugs. I replaced it with a new 1 from the service center. Personally did it. Still the issue persists. Now another big issue. I guess I damaged the fuel screw. Even when full closed, it runs the mixture rich :O bike stays on even at 1000rpm and wierd smell of petrol