Re: Yamaha FZ 25 Owners Reviews and Experiences

Thank you so much for the detailed response sir. The summary I infer is that bs4 and bs6 would have their individual merits but the coin rattling is unlikely to be touched. Also the power drop in bs6 models might reduce the low end a bit and the cost would be up.

Also did your bike go fot the recall job to fix plate bolts? How has it been behaving since?

Re: Yamaha FZ 25 Owners Reviews and Experiences

Fortunately my bike wasn't affected. but the according to svc, it doesn't really affect performance or anything but recall is done just as a precautionary measure. (that was expected from them as they are not going to say anything bad obviously )

If you are going for fz25, i would suggest you to book a unit by paying small amount if it's refundable and wait till bs6 version launches, compare both then decide which one is better, as there might be some feature upgrades like console design etc along with power/torque changes.

Re: Yamaha FZ 25 Owners Reviews and Experiences

What values they are adjusted to? keep it 0.06mm intake / 0.08mm exhaust.

Re: Yamaha FZ 25 Owners Reviews and Experiences

I had Fazer's windshield fitted. No use in reducing wind blast. Returned to stock visor.

Lluvia visor is too expensive for me. I heard about generic visor from Bandidos pit stop (Thrissur) is somewhat OK for the purpose. No side clamps needed..?

Re: Yamaha FZ 25 Owners Reviews and Experiences

I'm happy with the console and with the existing power and torque figures. My only questions were around the noises and if they are normal and don't affect engine life/reliability I don't see any reason not to buy a bs4 one let me know if I'm thinking correctly? Finding it very hard to wait 😁

Re: Yamaha FZ 25 Owners Reviews and Experiences

Can somebody tell me where is balancer thing located and how it is responsible for generating noise?

Re: Yamaha FZ 25 Owners Reviews and Experiences

This -


Now how it makes the noise i have no exact information on that. but i have a theory which could be totally wrong.


if you look at above diagram, you can see balancer weight(15) isn't directly connected to the crankshaft, instead gear 18 is. there are 6 springs between gear (18) and weight (15) what happens when engine runs is, those springs gets compressed and dampen the vibrations (this vibration is different from engine vibrations, we have balancer weight to counter engine vibrations) which may occur if it was directly connected to crankshaft. so that's why we need those things. now, springs are such, they don't always go fully compressed, below 4k rpm, they are barely compressed, between 4-6k rpm springs switch between fully compressed to fully extend and that creates weird coin rattling noise this is also the reason why vibrations increase in this rpm band. above 6k rpm springs are fully compressed and again noise disappears although the engine noise is a little different compared to below 4k rpm.


now that's just my theory and as i said it could be totally wrong. but one thing is sure that the noise comes from this mechanism. you can verify this by removing parts- 15, 21, 22, 20. as one guy tried it at my local svc, but bike was vibrating like an RE so he reverted back.

First time i read about it on advrider forum, then xt225 forum. and last year when there was a free monsoon checkup camp, many owners asked this question from Yamaha engineer who was there for taking feedback. and he said the same thing that the noise comes from balancer. and finally when one local guy solved the issue by removing it, now i have 0 doubt that the balancer mechanism is the culprit.

we can try different springs to see what changes it makes, but i believe it will also change the vibration characteristics of the engine. reliability is also a factor.

If you want to know how to remove it, watch this - com/watch?v=Qr3DdJgslBY


Forgot to add- if you plan on removing it, you will need to do some jugad to fix balancer weight facing away from crankshaft otherwise it will block movement. this is needed to disengage balancer from crankshaft without opening whole engine.

Re: Yamaha FZ 25 Owners Reviews and Experiences

It is almost 3000kms after the oil change (Yamaha sporty premium) and the engine became rough , especially with heating. Going for Motul 7100 10w40 soon.

When I gave the bike for coin rattling noise, they adjusted valve clearance which is also affecting performance. Currently gave to local service centre to correct valve setting. I have told them to put intake 0.06mm and exhaust 0.08mm after [MENTION=91784]slopegatri[/MENTION]'s recommendation.

Re: Yamaha FZ 25 Owners Reviews and Experiences

It is located just "ahead" of the crankshaft. I don't think it can cause any noise as similar design is used in almost all Jap street/commuters/offroad we have here (FZ16, GS150, Impulse 150 & 200, Hornet 160R, 160/200 4V, Gixxer, etc). AFAIK, the gear with bush and springs on the balancer shaft is to reduce backlash - any engineers here can verify - it is present in all the mentioned vehicles except NS160 and NS/RS/DUKE 200 which use a simple spur gear (In 390, KTM uses a Scissor gear like CBR250R). If the noise or coin rattling is a characteristic of the FZ25 engine, and there are no other faults like damaged bush/broken spring in the balancer shaft gear, one can't do much about it. Also, the noise comes from valvetrain or bottom end?

Re: Yamaha FZ 25 Owners Reviews and Experiences

If it's not coming from balancer, why after removing it, noise disappears ? maybe balancer affects something else ?

Also, that noise is present on every single fz25 out there. (4k-6k rpm).

Re: Yamaha FZ 25 Owners Reviews and Experiences

Balancer weight will never usually make those rattling/tappet-like sounds. If the shaft is bent, it's bearings gone or the balancer shaft gear has fault/manufacturing defect; the first symptom will be vibration. If this balancer being a little noisy is true (possible), a Yamaha engineer should be asked why this sound is not present in the FZ16 V1-V3. Removal of balancer is not advised - it will upset the smoothness of the engine - it will start vibrating more in all/high RPMs. The person who removed the balancer reminds me of the person who removed the o-rings from the chain of his Gixxer. Removal also means splitting the engine into 2.

Unlikely, it is not connected to anything else like the valves or clutch. In classic Pulsars, the scissor gear is known to produce rattling and mild vibration when worn out.

Then it's there by design, just like how GS150Rs have that faint metallic ringing sound in their cylinder/piston! Sadly, 4-6K is where most of us cruise.

Re: Yamaha FZ 25 Owners Reviews and Experiences

They tried. 06 and 0.08, but said tappet noise is high. They put 0.08 intake and 0.10mm exhaust.
Update : It is now OK.

Re: Yamaha FZ 25 Owners Reviews and Experiences

4~6k is also where the resonance vibes are most prominent, even on my P220 the Tacho needle rattles at that range.

My best guess is that it's simply something that's not torqued right and sports a metal washer that's causing the said rattling, I faced the same when one of my fork pinch bolts came loose on the D100, the spring washer made a coil rattling sound at the mid range until it was torqued right.

Re: Yamaha FZ 25 Owners Reviews and Experiences

Unfortunately i didn't know what kind of balancer fz16 has at that time so i didn't ask him about it. hopefully there will be another such feedback camp in future i'll ask him for sure.

yes, he opened whole engine. and after removal bike was vibrating like hell at all rpms but there was no rattling noise anymore. he reverted back after 200-250km because it was too uncomfortable. his bike is currently around 30k odo.


yes, that's what i also think. because xt250/fz25/ybr250/fazer25 all the bikes using this engine, have this noise.

Re: Yamaha FZ 25 Owners Reviews and Experiences

Resonance is very likely explanation as all of them have it in the same range acc to slopegatri. Only concern here is that there are 2 bolts behind the camshaft access cap that are notorious for loosening and falling inside engine (they recalled several units to apply threadlocker).

They were probably uncomfortable telling you they can't do anything about it or, sometimes the SVC mechanics themselves are clueless. As long as the sound doesn't bother, ignore and have fun riding.