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**rajan_coolrock00** · 11-22-2019, 12:58 PM

Re: Yamaha FZ 25 Owners Reviews and Experiences

Originally posted by Shashank K R View Post

Performance is good right? It should accelerate very smoothly till 115, and should be able to hold 100-105 easily without much vibes.

I'm waiting for the results of that compression test by you and [MENTION=91784]slopegatri[/MENTION] [emoji28].

Performance is good, I suppose. I should try to hit top speed and see how is the response.

No decent compression tester here in Nepal. Here SVCs don't even have Yamaha Diagnostic Tool.

**Kirankarunan** · 11-22-2019, 03:15 PM

Re: Yamaha FZ 25 Owners Reviews and Experiences

Originally posted by Shashank K R View Post

EDIT - I did just read about 0.06/0.08 and 0.05/0.08, but I am still unsure of what settings to apply, or what to do.

Hi sorry to hear about your troubles. I think possibly some other mistake happened at the ASC. The valve adjustment might have been done not at true Top Dead Center (or Before TDC, i forgot). Both rockers should have play at the correct mark on the magneto. It's an easy mistake to make if not paying attention. But difficult to prove. Anyway just a possibility.

Another possible reason for poor performance is blocked fuel injector and/or dirty throttle body.

Thanks for the tip about Moto Den.

**slopegatri** · 11-22-2019, 03:37 PM

Re: Yamaha FZ 25 Owners Reviews and Experiences

Originally posted by Kirankarunan View Post

Hi sorry to hear about your troubles. I think possibly some other mistake happened at the ASC. The valve adjustment might have been done not at true Top Dead Center (or Before TDC, i forgot). Both rockers should have play at the correct mark on the magneto. It's an easy mistake to make if not paying attention. But difficult to prove. Anyway just a possibility.

Another possible reason for poor performance is blocked fuel injector and/or dirty throttle body.

Thanks for the tip about Moto Den.

yes, this is possible too. but for proper clearance, (use feeler gauge with micrometer both at same value. you will get the feel of how much drag is required). and after that tighten the top 10mm nut using torque wrench set to 10lb/ft. once that is done check clearance again. it's a lengthy process to get proper clearance.

Compression tester is available at yamaha svc, you could ask them to test it. in my case it will take some time.

**Shashank K R** · 11-22-2019, 03:39 PM

Re: Yamaha FZ 25 Owners Reviews and Experiences

Originally posted by Kirankarunan View Post

Hi sorry to hear about your troubles. I think possibly some other mistake happened at the ASC. The valve adjustment might have been done not at true Top Dead Center (or Before TDC, i forgot). Both rockers should have play at the correct mark on the magneto. It's an easy mistake to make if not paying attention. But difficult to prove. Anyway just a possibility.

Another possible reason for poor performance is blocked fuel injector and/or dirty throttle body.

Thanks for the tip about Moto Den.

Injectors and pump were recently cleaned. I'm not sure what the ASC did, but the bike was fine for 2-3 months before it started showing signs of an issue.

At Moto Den he confirmed there's no other issue except for the clearances. This weekend I'll check them again.

Last time I had set it in such a way that 0.05 was too loose (no resistance), 0.06 had some drag, and 0.07 was somewhat tight (the strip went in, but with difficulty).
[MENTION=91784]slopegatri[/MENTION] [MENTION=91505]Kirankarunan[/MENTION] what clearances do you suggest I try?

**slopegatri** · 11-22-2019, 04:04 PM

Re: Yamaha FZ 25 Owners Reviews and Experiences

Originally posted by Shashank K R View Post

Injectors and pump were recently cleaned. I'm not sure what the ASC did, but the bike was fine for 2-3 months before it started showing signs of an issue.

At Moto Den he confirmed there's no other issue except for the clearances. This weekend I'll check them again.

Last time I had set it in such a way that 0.05 was too loose (no resistance), 0.06 had some drag, and 0.07 was somewhat tight (the strip went in, but with difficulty).
@slopegatri @Kirankarunan what clearances do you suggest I try?

Imo, try 0.06/0.08mm. and both gauges should barely go inside (high resistance). i currently use same values. bike touches 135kph with a pillion without any trouble. and noise is also lower than 0.07/0.10mm i was using before. i'm planning to try 0.05/0.08mm to see if there's any improvement.

also, if possible use certified feeler gauges ( try to get one from yamaha svc ). and use and high quality micrometer to verify it's value ( you can do this in any reputed lathe workshop).

**Shashank K R** · 11-22-2019, 04:06 PM

Re: Yamaha FZ 25 Owners Reviews and Experiences

Originally posted by slopegatri View Post

Imo, try 0.06/0.08mm. and both gauges should barely go inside (high resistance). i currently use same values. bike touches 135kph with a pillion without any trouble. and noise is also lower than 0.07/0.10mm i was using before. i'm planning to try 0.05/0.08mm to see if there's any improvement.

also, if possible use certified feeler gauges ( try to get one from yamaha svc ). and use and high quality micrometer to verify it's value ( you can do this in any reputed lathe workshop).

Thanks for the quick response, I'll try 0.06/0.08 and update the thread.

I was using some local feeler gauge. Recently bought a set from Stanley, and got the accuracy verified. Hopefully the bike will be back to normal after this.

**Kirankarunan** · 11-22-2019, 04:40 PM

Re: Yamaha FZ 25 Owners Reviews and Experiences

Originally posted by Shashank K R View Post

Thanks for the quick response, I'll try 0.06/0.08 and update the thread.

I was using some local feeler gauge. Recently bought a set from Stanley, and got the accuracy verified. Hopefully the bike will be back to normal after this.

Hi what slopegatri mentioned, those values work for me too. Although I hardly take past 105km that too for few seconds only. But the run up to it is a lot of fun. My riding is more quick 0-60kmph, brake and then repeat. This is when I am rushed but otherwise very sedate riding.

Also [MENTION=91784]slopegatri[/MENTION] my process to set tappets involves letting the feeler in between the tappet and valve. Then developing a firm but not rough drag on the feeler. One more thing is don't attempt when tired. Keep enough time to do the job peacefully.

Check for unusual oil consumption. If something else is going on it will reflect.

My chain kit, when it was about to go, the last 3500 to 4000km saw a slight increase in fuel consumption. And a clear drop in top end. But I pushed its life as much as safely possible.

**tripping_billie** · 11-22-2019, 04:44 PM

Re: Yamaha FZ 25 Owners Reviews and Experiences

I hope the tappets adjustment you are doing is on a cold engine, since the clearences will change when hot. And secondly, do check TDC is of compression stroke since during intake stroke TDC, the valves could be open slightly to aid in scavenging. I move the rocker arm slightly and am able to feel if the valve is free (the difference is slight but very evident once you do it couple if times).
Once I had incorrectly adjusted tappets in Intake TDC and could hear slight tapping of valves against the piston. As long as the setting is within tolerance spec, there should be no problem.
If you still hear valve noise/low performance), there might be other issues (bent valve, leaking head or valve guides etc).

**Shashank K R** · 11-22-2019, 04:53 PM

Re: Yamaha FZ 25 Owners Reviews and Experiences

Originally posted by tripping_billie View Post

I hope the tappets adjustment you are doing is on a cold engine, since the clearences will change when hot. And secondly, do check TDC is of compression stroke since during intake stroke TDC, the valves could be open slightly to aid in scavenging. I move the rocker arm slightly and am able to feel if the valve is free (the difference is slight but very evident once you do it couple if times).
Once I had incorrectly adjusted tappets in Intake TDC and could hear slight tapping of valves against the piston. As long as the setting is within tolerance spec, there should be no problem.
If you still hear valve noise/low performance), there might be other issues (bent valve, leaking head or valve guides etc).

Thanks for the response. Yes, I do it in the morning after a night's rest. Have done it multiple times on the Gixxer and Unicorn 160, this is the first time where my adjustment wasn't very successful.

**prakash_mvpa** · 11-23-2019, 10:47 PM

Re: Yamaha FZ 25 Owners Reviews and Experiences

They put intake 0.08 and exhaust 0.10mm (iirc) during last service. So far good, apart from the prominent coin rattling noise when revved.
--
I got the replacement rear park led bulb for ₹70. Photo attached.

**Shashank K R** · 11-24-2019, 01:56 AM

Re: Yamaha FZ 25 Owners Reviews and Experiences

Originally posted by Kirankarunan View Post

Hi what slopegatri mentioned, those values work for me too. Although I hardly take past 105km that too for few seconds only. But the run up to it is a lot of fun. My riding is more quick 0-60kmph, brake and then repeat. This is when I am rushed but otherwise very sedate riding.

Also [MENTION=91784]slopegatri[/MENTION] my process to set tappets involves letting the feeler in between the tappet and valve.

Today set them to 0.06 and 0.08mm. Will test ride on ORR tomorrow where I can make out differences if any.

Also, cleaned out the front sprocket area of mine and a friend's bike after 2k kms. Too much of gunk built up in his, mine was relatively clean.

**Kirankarunan** · 11-24-2019, 04:03 PM

Re: Yamaha FZ 25 Owners Reviews and Experiences

Originally posted by Shashank K R View Post

Also, cleaned out the front sprocket area of mine and a friend's bike after 2k kms. Too much of gunk built up in his, mine was relatively clean.

I cleaned mine first time at 30000km when I was changing the chain kit. It does not get any dirtier as the buildup just falls out after a point. So I guess you can leave it be too. The chain lube is quite dense and just stays put as buildup. Meaning doesn't end up that much on the chain.

**Shashank K R** · 11-24-2019, 10:31 PM

Re: Yamaha FZ 25 Owners Reviews and Experiences

Originally posted by Kirankarunan View Post

I cleaned mine first time at 30000km when I was changing the chain kit. It does not get any dirtier as the buildup just falls out after a point. So I guess you can leave it be too. The chain lube is quite dense and just stays put as buildup. Meaning doesn't end up that much on the chain.

In his case, the debris had built up and solidified. The chain was scraping that, it was like a second chain guide. There were a few stones and a lot of sand along with the lube.

Today I rode on the ORR, but couldn't make out much of a difference as the ride was short. Will ride for a full week and report.

**Shashank K R** · 11-24-2019, 11:36 PM

Re: Yamaha FZ 25 Owners Reviews and Experiences

[MENTION=91784]slopegatri[/MENTION] I remember reading somewhere that you managed to get the Iridium plug. Did you get it online, or at a local store? I couldn't get it anywhere in Bengaluru or online.

**slopegatri** · 11-25-2019, 12:00 AM

Re: Yamaha FZ 25 Owners Reviews and Experiences

Originally posted by Shashank K R View Post

@slopegatri I remember reading somewhere that you managed to get the Iridium plug. Did you get it online, or at a local store? I couldn't get it anywhere in Bengaluru or online.

Bought from Amazon.com, it's not available in India AFAIK.

but there's barely any difference tbh only noticeable difference are less backfire and stable idling rpm. mileage and performance improvement is within margin of error.

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