Re: Honda CBR 250R

The " Tarrrrr" sound is probably the tensioner, replace the tensioner and it'll be fixed. But for me the tensioner sound " tarrr" comes back after every 1-2k kms of riding with the new one.

I did a DIY to fix that problem ( easy diy ) which was posted by [MENTION=80157]sman999[/MENTION] in this thread and thanks to him, the tensioner sound had gone away for almost about 5k kms. So i strongly suggest people with this problem to look over for the DIY as it helped me save 500 bucks almost every month. [emoji4][emoji106]

For the DIY check around page-1717.


-Zaid [emoji111]

Re: Honda CBR 250R

All said and done, can someone shed some light on why the shim and tensioner go kaput so fast. What could be the reasons.

I understand that they are mechanical parts and are subject to wear and tear with time. But why so early ?

Cheers,
Sanjay

Re: Honda CBR 250R

Saar!!! The shim way will be expensive than replacing just the tensioner.

Replacing the tensioner - 500rs.
Checking or replacing the shims - 750rs Labour + 171-200rs for each shim which will.be around 1500 rs approximate.

Replacing tensioner is just plug and play and for shim we need to open the cylinder head which takes hours to do.

So can you please explain how to go ahead ?

Sorry to be a noob here, asking for few clarifications. Thats all

Cheers,
Sanjay

Re: Honda CBR 250R

Ok... That i can do... But is that cbr 250 having such problem saw many complaints on this... Why this happened how to judge any second hand bike having this problem...
Why i am asking as i am getting cbr 2013 250cc model only 12000km in 85000/-

Re: Honda CBR 250R

Yes, please check the condition of the chain tensioner before changing it. If the tensioner is loose you can change the bolt 🔩 on the tensioner to a 10mm bolt and get rid of the problem. I solved mine so by changing the bolt.

Re: Honda CBR 250R

Yes maneesh, I am aware of your DIY post. But the whole point of this discussion is to know the reaosns why they go kaput very soon (shims and tensioner).

Even a tiny bit of sound or jingling or tingling or whatever acceptable after the engine has heated up ?

I always felt a mild stitching sound or a bit of harshness is ok because metal expands when.heated up a fair amount.

S&S allen key bolt will do ? what should be the length ?

Cheers,
Sanjay

Re: Honda CBR 250R

I used a 10mm bolt. Any length just a bit more than the stock should do. Allen key won't help because you have to tighten it to the entire length of the Allen key bolt that you are using. Where as if u use a normal bolt you can stop it at the desired tension with the help of the nut after screwing the bolt.

I haven't got shim issues often except for once and I changed it in the SVC recently. I learnt this DIY from my trusted mechanic as the SVC guys would just change the tensioner if they found out the tensioner is loose. They don't have an answer with regards to the tensioner.

If these two are not the issue then it might be with the clutch bell. If the clutch bell Springs are worn out it would give a similar sound. How good is your clutch? Any noticeable difference with the pick up?

Re: Honda CBR 250R

I meant replacing tensioner every time is significantly costlier than a one time shim adjustment which is cheaper.

For now, Sanjay, I'd suggest you check your shims as I reiterated, proceed to tensioner/chain after if again you're having issues.

Maneesh had done the bolt DIY and it's having good results. So do give that a try.

Cheers!
VJ

Re: Honda CBR 250R

Nope, no difference in clutch and pickup and no sound from clutch bell. The bike pulls nicely without fuss.

Maneesh, can you pm me your number, so that I can ask more about that DIY.

Cheers,
Sanjay

Re: Honda CBR 250R

Anyone up for any logical reasoning for my above query.

Cheers,
Sanjay

Re: Honda CBR 250R

My doubt is - why are some bikes having the issue and mine doesn't? Assuming quality of shims and other parts are equal, we are left with riding style- and mine is not sedate by any means. Even when buying groceries I sometimes go up to 10k rpm in the city, when I see an empty road. Still, I have no problems except the random engine stalling which I believe is fixed, and the 5k rpm rattle.

Re: Honda CBR 250R

Pretty much the same, ridden 18500km , bikes been running fine, I'll be honest I didn't take proper care of the bike till 10000km , only after that I started changing engine oil every 3000-3500km, n lubing my chain every week,bike has not faced any problem apart from a dead battery which was replaced at my house and once when I was running on the custom exhaust pipe, the bike had this issue with clutching where it used to turn off below 1000rpm which somehow corrected itself god knows how, also had 1 crash like a long time back when a idiot lane switched without a indicator at the signal then I jus had damage to the side fairing n the bike was dropped 3-5 times on a standing position.. With all this my bike is fine, still smooth as ever, and I have run it in every traffic scenario, never faced any problems with coolant or anything. Also did a highway run, bike went up to 158-160 with room of 1500rpm but that's how its tuned, won't redline at 10500rpm unless u ecu remap, overall I had the option back in 2014 of the CBR, Duke 200 n 390, karizma zmr, I'm soo glad I went for the CBR because Honda quality n engines have never let me down, having started on a unicorn 2004 sporks model . Even for a upgrade o got the CBR 650f as my preference but its pricing Is a bit high, I hope Honda releases the cb 650f.. It would be a lakh cheaper for sure.

Re: Honda CBR 250R

According to me with regards to shim, The mechanics are illiterate/dumb enough or Honda didn't train the mechanics enough/precisely to handle such parts. ASAT!

Chain tensioner issue I read it even in cbr250r international forum I guess. So it might be a quality issue.

Re: Honda CBR 250R

AFAIK shims do not wear off, but the rocker arms and the cotters where shims sit. In due course of time, the gaps increase and shims start making jingle noise (depends on riding and spare quality). A little shim noise is acceptable once the engine is hot. Since the shims are just the replacement of tappet adjusting nuts, we are left with no other options except replacing them with a bigger sizes (this needs a precise calculation) when the gaps increase. If the gaps are minimal, it doesn't affect it anyway except the jingle noise. I am riding my CBR for last 5000 Km with same chick chick noise and there is absolutely no difference in power delivery or fuel consumption. Earlier, I was worried too and discussed the same with experts, went to Honda SVC and it was all fine - within normal limits. I have completely ignored that noise. Believe me, it's more of a paranoia than a real problem. For satisfaction, I did change the CCT as well. The old CCT was also good though.

So if it is just minimal noise and there is no effect on your fuel economy, power delivery, vibrations, etc, just ride your bike and ignore such things. It's really not going to do any hazards to your engine. Yes, the valve clearance check is recommended as per the service manual.*

Thank you!

Re: Honda CBR 250R

The problems aren't the shims themselves, if a tappet adjustment bike can go more than 7k without an adjustment, there is a reason why shims are present in place of tappet setup, as they increase the service interval, quieter operation and lasts quite a while. Yes, as with every components, shims too periodically require a replacement depending on the problem we have on hand. I 99% would blame it on poor training, not the lack of skill set. Though service centers do send their "senior" mechanics for the periodic training updates, how it trickles down the guy who does the work on the floor is what's lacking. Imagine this, if one guys knows everything and if the guy shepherds everyone on the floor instead of teaching the guy who does the real deal on the floor, it's going to be an impediment for the common mechanic there.


The chief mechanic should inculcate people on the floor as to what he's learned, tips, tricks, so this way they immediately know the issue. It's not about always changing the shims, it's about measuring them, checking the gap after installation, so much minute, minute detailed process which are overlooked and the end result is a shoddy job with the ultimate price being paid by the us, the customer.

In my experience it's sad that this is in fact the current status quo.

Cheers!
VJ