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**rajan_coolrock00** · 11-21-2019, 05:29 PM

Re: Yamaha FZ 25 Owners Reviews and Experiences

Originally posted by slopegatri View Post

within spec doesn't mean there would be no noise, that just means performance difference isn't that much.( also depends on accuracy of the person using feeler gauge)
try these -
Intake at 0.05mm
Exhaust at 0.08mm

it will reduce the noise somewhat.

Not yet. planning to do that once Abs retrofitting is done. might take another week or two, as 1 part (brake hose mount) is still missing.

I am worried about setting up too little clearances.
What if the valve always stay open because of low clearances?
There will no tick tick noise but on the longer run, it is harmful for the engine because valve won't seat properly and there will be loss of compression and increase in carbon deposits.

I have set my valve clearances as
INTAKE 0.05 - 0.06 mm
EXHAUST 0.09 mm

There is no tick tick sound.

**slopegatri** · 11-21-2019, 06:31 PM

Re: Yamaha FZ 25 Owners Reviews and Experiences

Originally posted by rajan_coolrock00 View Post

I am worried about setting up too little clearances.
What if the valve always stay open because of low clearances?
There will no tick tick noise but on the longer run, it is harmful for the engine because valve won't seat properly and there will be loss of compression and increase in carbon deposits.

I have set my valve clearances as
INTAKE 0.05 - 0.06 mm
EXHAUST 0.09 mm

There is no tick tick sound.

As long as minimum gap is INTAKE 0.05mm/ EXHAUST 0.07 mm, don't worry about it. gap actually increase in this engine anyway once it gets hot, i have tested this myself.

I thought you were having noise at idle even with 0.07/0.09mm, that's why i said to reduce it. otherwise leave it to w/e within spec.

**Kirankarunan** · 11-21-2019, 06:36 PM

Re: Yamaha FZ 25 Owners Reviews and Experiences

For anyone who wants to use it, Loctite threadlocker is available on tryloctite for good price. As part of some promotion. I got 50ml of number 290 for Rs 355. Made in India.

**rajan_coolrock00** · 11-21-2019, 09:17 PM

Re: Yamaha FZ 25 Owners Reviews and Experiences

Originally posted by slopegatri View Post

As long as minimum gap is INTAKE 0.05mm/ EXHAUST 0.07 mm, don't worry about it. gap actually increase in this engine anyway once it gets hot, i have tested this myself.

I thought you were having noise at idle even with 0.07/0.09mm, that's why i said to reduce it. otherwise leave it to w/e within spec.

I am experiencing the same (apparently gap increasing when engine getting hot)

At 0.06(in)/0.09(ex), I am not hearing tick sound during cold engine but once the bike is ridden for about 30 mins, there is clear distinct tick sound. So, I think that the valve clearance has apparently increased.

It would clear our conclusion if we could measure the gap while the engine is hot.

**slopegatri** · 11-21-2019, 09:30 PM

Re: Yamaha FZ 25 Owners Reviews and Experiences

Originally posted by rajan_coolrock00 View Post

I am experiencing the same (apparently gap increasing when engine getting hot)

At 0.06(in)/0.09(ex), I am not hearing tick sound during cold engine but once the bike is ridden for about 30 mins, there is clear distinct tick sound. So, I think that the valve clearance has apparently increased.

It would clear our conclusion if we could measure the gap while the engine is hot.

i have done it, burnt my hands too lol. exhaust valve gap increases upto 0.01mm after hard running for 30-40kms. intake around 0.005-0.006mm.

**rajan_coolrock00** · 11-21-2019, 10:34 PM

Re: Yamaha FZ 25 Owners Reviews and Experiences

Originally posted by slopegatri View Post

i have done it, burnt my hands too lol. exhaust valve gap increases upto 0.01mm after hard running for 30-40kms. intake around 0.005-0.006mm.

Haha but sorry to hear that. Anyway, great finding.!

**prakash_mvpa** · 11-21-2019, 11:17 PM

Re: Yamaha FZ 25 Owners Reviews and Experiences

We never hear much about tappet/valve clearance adjustment with Apache or Unicorn.

Anyone dig about the original Yamaha XT250 valve clearance? They're talking inches. [emoji849]

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Enjoy the videos and music that you love, upload original content and share it all with friends, family and the world on YouTube.

**slopegatri** · 11-22-2019, 12:29 AM

Re: Yamaha FZ 25 Owners Reviews and Experiences

Originally posted by prakash_mvpa View Post

We never hear much about tappet/valve clearance adjustment with Apache or Unicorn.

Anyone dig about the original Yamaha XT250 valve clearance? They're talking inches. [emoji849]

that xt250 is from 80s, totally different engine. we have the engine of 2008's xt250 which was originally without fi and oil cooling. it produced 16-17ps/17-18nm.

we don't hear about tappet/valve clearance adjustment with Apache or Unicorn because those have smaller valves, so valvetrain produces less noise (correct me if i'm wrong here). same with bigger engines having smaller 4 valves.

Currently there's no other bike in 250cc segment with only 2 valves. closest you get is p220 and that bike does have valvetrain noise, although it reduces once the engine is hot.

**Shashank K R** · 11-22-2019, 03:18 AM

Re: Yamaha FZ 25 Owners Reviews and Experiences

THIS IS GOING TO BE A LONG POST. You may want to grab some tea or snacks before reading this.

It's been a while since I posted here. Faced some issues with the bike and I'm currently not happy with the performance and state of the bike.

Rewind to March 2019-
I checked the valve clearances, inlet was a bit tight, set it to the clearances mentioned by Gurpal. Bike was amazing.

Had to give it for the 5k service, made the mistake of giving it to the ASC as I didn't have time. They did the work mostly satisfactorily, although they mentioned at the end that they adjusted the valve clearances. I didn't think much of it then.

June/July-
My bike was beginning to behave differently. I could feel the bike struggling at 90+ speeds and a bit while climbing hilly roads. I didn't think much of it as my oil was due for a change. Also, my battery had died randomly while on a ride in May, and I had got it changed. I felt it had something to do with this, since the data/settings would've probably been wiped when I removed the battery.

September-
I went on a small ride. I could feel the bike being sluggish even after the oil change. It did improve after a good ripping session on an empty highway, I left it as is even though there were doubts creeping in my mind.

Serious issues start cropping up-
It was at the end of September that I noticed serious performance issues with my bike. It was unlike anything I had faced before.
While on a ride, my bike was struggling. It was not climbing speeds easily, and 80+ speeds seemed like a big struggle. The biggest indicator that something was seriously wrong came when I found that I couldn't overtake a Gixxer while accelerating at full whack.

Till about 60kmph, the bike felt fine. After that, it was an epic struggle. 80kmph felt like a 150cc bike doing 100-110. Touching 100 was very difficult. The bike was struggling to breathe. FE went down from 32-34 in the city to 26-28. Alarmed, I knew immediately that the valve clearances had gone down.

I gave the bike to a friend's SVC (Unfortunately, I had misplaced my 24mm ring spanner, so I couldn't really check). His diagnosis - very tight tappets. Exhaust at 0.05mm, inlet at 0.03mm. Just 1000kms more, and my engine may have needed head work. He noticed that there was some wear on the rocker arms and valves.

On a separate note - Bengalureans trying to find a good SVC, try Moto Den near MS Ramiah Hospital. Owner's name is Rakshith, excellent mechanic who works mostly alone. Charges reasonable rates, allows you to stay and watch, and can also import parts.

Back to my bike issues-
Post adjustment, on the ride back, I noticed that the bike was back. Incredibly smooth, good power, touching 100kmph was a piece of cake. As soon as I reached home, I heard the engine noise. It was as if the tappets were loose. When cold, the engine sounded smooth with no noise. When hot, it was cacophony. It was probably due to the wear, and I was happy with the performance, so i continued using the bike.

But the joy was short lived. After just a few days, the performance went down, although it was not as bad as before. I could feel a lag while accelerating, so I checked the clearances myself. 0.10mm exhaust, 0.05mm inlet, hence I loosened the inlet a bit.

I then ripped it to keep up on a group ride with R3s and Dominars. It could touch 120kmph somewhat easily, but the difference between mine and other FZ25s was noticeable.

Problem solved? Unfortunately no. The bike still doesn't feel that good. Acceleration is not bad, but is not comparable to other FZ25s whose valves haven't been touched (belonging to xBhpians).

Take this as a cautionary tale. It may not be applicable to every bike. FZ25's engine is very sensitive to tappet adjustments. Make sure you do it right if you feel they're out of spec.
But what I noticed - the bikes whose valves clearances WERE NOT TOUCHED FROM THE START, perform wonderfully with very very little noise post 7-8k kms. I have noticed this with a lot of FZ25s whose valves weren't touched at all.

Coming back to the present-
The bike feels rough and "tight" (as in, not as free revving as other FZ25s). Every other consumable (air filter, spark plug, oil, oil filter) was replaced recently or is new. Chain is cleaned fully (including front sprocket) and lubed. Tyre pressure is 27/31, the bike has done ~15000kms.
I am unsure what to do next, although I will check the valves again with my new Stanley feeler gauge set.

Any help is appreciated. Please let me know what settings I can try to bring my bike back to normal. Right now, when cold there's no noise, and when hot, it is variable (sometimes very noisy, other times very quiet). The last time I checked, it was 0.06/0.10.

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.

**#bpk** · 11-22-2019, 10:57 AM

Re: Yamaha FZ 25 Owners Reviews and Experiences

Originally posted by Shashank K R View Post

THIS IS GOING TO BE A LONG POST. You may want to grab some tea or snacks before reading this.

It's been a while since I posted here. Faced some issues with the bike and I'm currently not happy with the performance and state of the bike.

Rewind to March 2019-
I checked the valve clearances, inlet was a bit tight, set it to the clearances mentioned by Gurpal. Bike was amazing.

Had to give it for the 5k service, made the mistake of giving it to the ASC as I didn't have time. They did the work mostly satisfactorily, although they mentioned at the end that they adjusted the valve clearances. I didn't think much of it then.

June/July-
My bike was beginning to behave differently. I could feel the bike struggling at 90+ speeds and a bit while climbing hilly roads. I didn't think much of it as my oil was due for a change. Also, my battery had died randomly while on a ride in May, and I had got it changed. I felt it had something to do with this, since the data/settings would've probably been wiped when I removed the battery.

September-
I went on a small ride. I could feel the bike being sluggish even after the oil change. It did improve after a good ripping session on an empty highway, I left it as is even though there were doubts creeping in my mind.

Serious issues start cropping up-
It was at the end of September that I noticed serious performance issues with my bike. It was unlike anything I had faced before.
While on a ride, my bike was struggling. It was not climbing speeds easily, and 80+ speeds seemed like a big struggle. The biggest indicator that something was seriously wrong came when I found that I couldn't overtake a Gixxer while accelerating at full whack.

Till about 60kmph, the bike felt fine. After that, it was an epic struggle. 80kmph felt like a 150cc bike doing 100-110. Touching 100 was very difficult. The bike was struggling to breathe. FE went down from 32-34 in the city to 26-28. Alarmed, I knew immediately that the valve clearances had gone down.

I gave the bike to a friend's SVC (Unfortunately, I had misplaced my 24mm ring spanner, so I couldn't really check). His diagnosis - very tight tappets. Exhaust at 0.05mm, inlet at 0.03mm. Just 1000kms more, and my engine may have needed head work. He noticed that there was some wear on the rocker arms and valves.

On a separate note - Bengalureans trying to find a good SVC, try Moto Den near MS Ramiah Hospital. Owner's name is Rakshith, excellent mechanic who works mostly alone. Charges reasonable rates, allows you to stay and watch, and can also import parts.

Back to my bike issues-
Post adjustment, on the ride back, I noticed that the bike was back. Incredibly smooth, good power, touching 100kmph was a piece of cake. As soon as I reached home, I heard the engine noise. It was as if the tappets were loose. When cold, the engine sounded smooth with no noise. When hot, it was cacophony. It was probably due to the wear, and I was happy with the performance, so i continued using the bike.

But the joy was short lived. After just a few days, the performance went down, although it was not as bad as before. I could feel a lag while accelerating, so I checked the clearances myself. 0.10mm exhaust, 0.05mm inlet, hence I loosened the inlet a bit.

I then ripped it to keep up on a group ride with R3s and Dominars. It could touch 120kmph somewhat easily, but the difference between mine and other FZ25s was noticeable.

Problem solved? Unfortunately no. The bike still doesn't feel that good. Acceleration is not bad, but is not comparable to other FZ25s whose valves haven't been touched (belonging to xBhpians).

Take this as a cautionary tale. It may not be applicable to every bike. FZ25's engine is very sensitive to tappet adjustments. Make sure you do it right if you feel they're out of spec.
But what I noticed - the bikes whose valves clearances WERE NOT TOUCHED FROM THE START, perform wonderfully with very very little noise post 7-8k kms. I have noticed this with a lot of FZ25s whose valves weren't touched at all.

Coming back to the present-
The bike feels rough and "tight" (as in, not as free revving as other FZ25s). Every other consumable (air filter, spark plug, oil, oil filter) was replaced recently or is new. Chain is cleaned fully (including front sprocket) and lubed. Tyre pressure is 27/31, the bike has done ~15000kms.
I am unsure what to do next, although I will check the valves again with my new Stanley feeler gauge set.

Any help is appreciated. Please let me know what settings I can try to bring my bike back to normal. Right now, when cold there's no noise, and when hot, it is variable (sometimes very noisy, other times very quiet). The last time I checked, it was 0.06/0.10.

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.

I feel for you , 1st with unicorn and now with fz 25 ! May your problems get resolved.

**rajan_coolrock00** · 11-22-2019, 12:39 PM

Re: Yamaha FZ 25 Owners Reviews and Experiences

Originally posted by Shashank K R View Post

THIS IS GOING TO BE A LONG POST. You may want to grab some tea or snacks before reading this.

It's been a while since I posted here. Faced some issues with the bike and I'm currently not happy with the performance and state of the bike.

Rewind to March 2019-
I checked the valve clearances, inlet was a bit tight, set it to the clearances mentioned by Gurpal. Bike was amazing.

Had to give it for the 5k service, made the mistake of giving it to the ASC as I didn't have time. They did the work mostly satisfactorily, although they mentioned at the end that they adjusted the valve clearances. I didn't think much of it then.

June/July-
My bike was beginning to behave differently. I could feel the bike struggling at 90+ speeds and a bit while climbing hilly roads. I didn't think much of it as my oil was due for a change. Also, my battery had died randomly while on a ride in May, and I had got it changed. I felt it had something to do with this, since the data/settings would've probably been wiped when I removed the battery.

September-
I went on a small ride. I could feel the bike being sluggish even after the oil change. It did improve after a good ripping session on an empty highway, I left it as is even though there were doubts creeping in my mind.

Serious issues start cropping up-
It was at the end of September that I noticed serious performance issues with my bike. It was unlike anything I had faced before.
While on a ride, my bike was struggling. It was not climbing speeds easily, and 80+ speeds seemed like a big struggle. The biggest indicator that something was seriously wrong came when I found that I couldn't overtake a Gixxer while accelerating at full whack.

Till about 60kmph, the bike felt fine. After that, it was an epic struggle. 80kmph felt like a 150cc bike doing 100-110. Touching 100 was very difficult. The bike was struggling to breathe. FE went down from 32-34 in the city to 26-28. Alarmed, I knew immediately that the valve clearances had gone down.

I gave the bike to a friend's SVC (Unfortunately, I had misplaced my 24mm ring spanner, so I couldn't really check). His diagnosis - very tight tappets. Exhaust at 0.05mm, inlet at 0.03mm. Just 1000kms more, and my engine may have needed head work. He noticed that there was some wear on the rocker arms and valves.

On a separate note - Bengalureans trying to find a good SVC, try Moto Den near MS Ramiah Hospital. Owner's name is Rakshith, excellent mechanic who works mostly alone. Charges reasonable rates, allows you to stay and watch, and can also import parts.

Back to my bike issues-
Post adjustment, on the ride back, I noticed that the bike was back. Incredibly smooth, good power, touching 100kmph was a piece of cake. As soon as I reached home, I heard the engine noise. It was as if the tappets were loose. When cold, the engine sounded smooth with no noise. When hot, it was cacophony. It was probably due to the wear, and I was happy with the performance, so i continued using the bike.

But the joy was short lived. After just a few days, the performance went down, although it was not as bad as before. I could feel a lag while accelerating, so I checked the clearances myself. 0.10mm exhaust, 0.05mm inlet, hence I loosened the inlet a bit.

I then ripped it to keep up on a group ride with R3s and Dominars. It could touch 120kmph somewhat easily, but the difference between mine and other FZ25s was noticeable.

Problem solved? Unfortunately no. The bike still doesn't feel that good. Acceleration is not bad, but is not comparable to other FZ25s whose valves haven't been touched (belonging to xBhpians).

Take this as a cautionary tale. It may not be applicable to every bike. FZ25's engine is very sensitive to tappet adjustments. Make sure you do it right if you feel they're out of spec.
But what I noticed - the bikes whose valves clearances WERE NOT TOUCHED FROM THE START, perform wonderfully with very very little noise post 7-8k kms. I have noticed this with a lot of FZ25s whose valves weren't touched at all.

Coming back to the present-
The bike feels rough and "tight" (as in, not as free revving as other FZ25s). Every other consumable (air filter, spark plug, oil, oil filter) was replaced recently or is new. Chain is cleaned fully (including front sprocket) and lubed. Tyre pressure is 27/31, the bike has done ~15000kms.
I am unsure what to do next, although I will check the valves again with my new Stanley feeler gauge set.

Any help is appreciated. Please let me know what settings I can try to bring my bike back to normal. Right now, when cold there's no noise, and when hot, it is variable (sometimes very noisy, other times very quiet). The last time I checked, it was 0.06/0.10.

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.

Same here, I am also not happy of me touching the valve clearances. I have adjusted valve clearances about 5 times since last week. Nothing seems right, I hear tick tick sound when engine is hot.

Clearances are within the specs so I guess everything will work out to be fine.

**rajan_coolrock00** · 11-22-2019, 12:43 PM

Re: Yamaha FZ 25 Owners Reviews and Experiences

Check compression of your engine. I am unable to find a decent compression tester here in my country.

**Shashank K R** · 11-22-2019, 12:43 PM

Re: Yamaha FZ 25 Owners Reviews and Experiences

Originally posted by rajan_coolrock00 View Post

Same here, I am also not happy of me touching the valve clearances. I have adjusted valve clearances about 5 times since last week. Nothing seems right, I hear tick tick sound when engine is hot.

Clearances are within the specs so I guess everything will work out to be fine.

As long as the performance is good, and there's no noise when the engine is cold, don't touch them.

The performance unfortunately, is not so good in mine.

**rajan_coolrock00** · 11-22-2019, 12:46 PM

Re: Yamaha FZ 25 Owners Reviews and Experiences

Originally posted by Shashank K R View Post

As long as the performance is good, and there's no noise when the engine is cold, don't touch them.

The performance unfortunately, is not so good in mine.

Already touched, now there is no going back [emoji23].
I will be touching them after I get hands on good compression tester.
Currently, valve clearances are as:
INTAKE : 0.05-0.06mm
EXHAUST : 0.09mm

**Shashank K R** · 11-22-2019, 12:49 PM

Re: Yamaha FZ 25 Owners Reviews and Experiences

Originally posted by rajan_coolrock00 View Post

Already touched, now there is no going back [emoji23].
I will be touching them after I get hands on good compression tester.
Currently, valve clearances are as:
INTAKE : 0.05-0.06mm
EXHAUST : 0.09mm

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].

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