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**Bipr15** · 12-06-2011, 11:52 PM

Hi all i'm asking this question on behalf of my brother he juz bought cbr 250r he's asking me weather he can use yamalube 20w40 for cbr 250r plz temme wht is the recommended grade for cbr 250r thanks

**darkknight** · 12-07-2011, 12:28 AM

got my bike after 15 days :

radiator fan assembly replaced -- Free of cost (foc)

brake pedal & heel guard replaced - foc (dunno why)

valve clearance checked,cone set adjusted,chain adjusted,coolant replaced (rs. 250) , suspension greased & adjusted,accesories I provided were fitted (brake lever & front reservoir cap pending as i have got accesories for abs version by mistake & the assembly is little different),clutch & accelarator cable greased,brake oil levels checked,washed twice etc

existing problems without solution :throttle is bit more stiff than other cbrs since day 1, a minor issue but bothers in long runs

verall vibes reduced considerably but handlebar & footpeg still feels them at lower rpms (something i am guessing as the character of the bike)

one freaking mirror costs Rs.405

(broke in transport).am not happy with brake pad & mirror pricing at all.should have asked foc

overall vihaan is the best service centre amongst any of the manufacturer's bikes that I own.

**abhiwar** · 12-07-2011, 01:39 AM

Originally posted by MD24 View Post

Hi all

Can anybody tell me the difference between a shim & the tappet??

I thought there was a tappet noise in my bike but the ASC guy said its the shims (which are not available). Now what do they with the shim?? He said he will not change it but do some tapping so that the noise doesn't come. Had to leave the bike with them.
Has anybody else faced this problem?

Shims are use to set valve clearance . its a same shape as battery which we use in our digital/wrist watch . please google shim and you will get enough information about it . If you can hear a tappet noise it mean a wrong size shim was installed while setting valve clearance so you need to install correct size of shim to solve this issue. I dont have any idea about tapping a shim i had faced similar problem which was resolve by REPLACING SHIMS so before proceeding pleas gather some info about this tapping and if possible wait for shims to arrive @ your SVC and replace them .

**blackprince** · 12-07-2011, 03:42 AM

i am facing a rattle sound every time when i accelerate the bike and this sound starts around 4.5k rpm and goes after 5.5 k rpm. but if i accelerate the bike in neutral ...then there is no rattle sound at even at 4.5 k or any where... please help me in this issue ...

**aargee** · 12-07-2011, 04:16 AM

@Blackprince - Something to do with tires/alloy wheels/fork I guess; take it to a competent ASC in your locality.

**martin_sky77** · 12-07-2011, 08:44 AM

Originally posted by MD24 View Post

Hi all

Can anybody tell me the difference between a shim & the tappet??

I thought there was a tappet noise in my bike but the ASC guy said its the shims (which are not available). Now what do they with the shim?? He said he will not change it but do some tapping so that the noise doesn't come. Had to leave the bike with them.
Has anybody else faced this problem?

to put it simple, tappet is a part of rocker arm which tapping the valve (sometimes in DOHC engine, the camshaft itself do the tapping job)
shim (mostly used in DOHC engine) is a part between the tappet and the valve (sometimes there's a valve bucket between shim and tappet [tappet --> valve bucket --> shim --> valve])

shim is used to adjust the valve clearance (when the tappet's adjusting screw are not present), and shim is used mostly in DOHC engine (some DOHC engine still use the adjusting screw)..

so if you heard some tappet noise, of course it will make a noise (b'coz there's a clearance between them)
but if it's sounded abnormal, it means the clearance is out of normal clearance and it needs to be adjusted..replace your shim(s) at SVC for free (if your bike still under warranty), and replace it with the shim(s) (with different thicknessabhiwar said, try googling about shim, tappet, dohc, if you really interested with those stuff..
or you can try to download this (http://tyga-performance.com/cbr250r/...S%20MANUAL.pdf) if you want to know what's inside cbr's engine

**MD24** · 12-07-2011, 10:26 AM

Originally posted by abhiwar View Post

Shims are use to set valve clearance . its a same shape as battery which we use in our digital/wrist watch . please google shim and you will get enough information about it . If you can hear a tappet noise it mean a wrong size shim was installed while setting valve clearance so you need to install correct size of shim to solve this issue. I dont have any idea about tapping a shim i had faced similar problem which was resolve by REPLACING SHIMS so before proceeding pleas gather some info about this tapping and if possible wait for shims to arrive @ your SVC and replace them .

Originally posted by martin_sky77 View Post

to put it simple, tappet is a part of rocker arm which tapping the valve (sometimes in DOHC engine, the camshaft itself do the tapping job)
shim (mostly used in DOHC engine) is a part between the tappet and the valve (sometimes there's a valve bucket between shim and tappet [tappet --> valve bucket --> shim --> valve])

shim is used to adjust the valve clearance (when the tappet's adjusting screw are not present), and shim is used mostly in DOHC engine (some DOHC engine still use the adjusting screw)..

so if you heard some tappet noise, of course it will make a noise (b'coz there's a clearance between them)
but if it's sounded abnormal, it means the clearance is out of normal clearance and it needs to be adjusted..replace your shim(s) at SVC for free (if your bike still under warranty), and replace it with the shim(s) (with different thicknessabhiwar said, try googling about shim, tappet, dohc, if you really interested with those stuff..
or you can try to download this (http://tyga-performance.com/cbr250r/...S%20MANUAL.pdf) if you want to know what's inside cbr's engine

Thanks Abhiwar & Martin

Thats a great piece of info. Now just 1 thing, since the svc is not having shims is it ok if I ride my bike this way? Secondly do you think that the shim should need adjustment or replacement so soon i.e. I've just completed around 950kms?

If this is so then the svc eng. should have done that at the tme of my 1st service. Don't you feel so? I'm already having some issues with them regarding the excessive billing which I've conveyed to them.

**mikewu** · 12-07-2011, 10:52 AM

Originally posted by martin_sky77 View Post

but if it's sounded abnormal, it means the clearance is out of normal clearance and it needs to be adjusted..replace your shim(s) at SVC for free (if your bike still under warranty), and replace it with the shim(s) (with different thicknessabhiwar said, try googling about shim, tappet, dohc, if you really interested with those stuff..
or you can try to download this (http://tyga-performance.com/cbr250r/...S%20MANUAL.pdf) if you want to know what's inside cbr's engine

@martin. i had a little chat with the service manager at my dealership and he confirmed that shims are not [officially] covered under warranty. although there may be exceptions. and the answer to my question as to why they are not covered under warranty was "shims are subjected to wear and tear, so it actually does not fall under the category of manufacturing defect." i did not find that as a satisfactory answer but thats all he said. and shims are not that cheap. to order a set you need to get the right measurements. and kinda have to wait for a while before you get the size you want. hope this helps

**MeTaL_MaNiaC** · 12-07-2011, 11:06 AM

Originally posted by blackprince View Post

i am facing a rattle sound every time when i accelerate the bike and this sound starts around 4.5k rpm and goes after 5.5 k rpm. but if i accelerate the bike in neutral ...then there is no rattle sound at even at 4.5 k or any where... please help me in this issue ...

by rattle, you mean a sound like a kaput piston right? If so, this sound is there in my bike too. It starts around 4.5krpm till 5krpm at any gear (didnt check in neutral) and generally when the bike is not accelarating too fast or running steady. Cruising at say 4k or even 3.5k rpm (6th gear), the sound isnt heard. And as soon as i accelerate above 4.5k, it is heard. It either dissapears after 5 or 5.5k or isnt heard because of wind but is not felt in the engine. I am pretty sure its from the engine. And i started noticing it only after the second service. Other then the sound, the bike pulls fine at all gears and all rpms as normal. Maybe its some rough patch as one member suggested earlier. But it is heard to be existing in many cbrs at the same rpms. It is more noticable when riding with a open face helmet or no helmet, with a normal full face helmet on, its not so audible.

**martin_sky77** · 12-07-2011, 11:09 AM

Originally posted by MD24 View Post

Thanks Abhiwar & Martin

Thats a great piece of info. Now just 1 thing, since the svc is not having shims is it ok if I ride my bike this way? Secondly do you think that the shim should need adjustment or replacement so soon i.e. I've just completed around 950kms?

If this is so then the svc eng. should have done that at the tme of my 1st service. Don't you feel so? I'm already having some issues with them regarding the excessive billing which I've conveyed to them.

since the svc currently don't have the shims, u can still use the bike with some minor issues (not problem)..the issues are something like poor mileage, lower power output, tappet noise, poor engine response, blahblahblah..it won't harm your bike since the tappet clearance are more than normal..

bike with shim will need shim replacement (with different thickness) not adjustment..i suggest you A.S.A.P. replace those shims, just keep "TERRORIZING" the svc (by phone or often come to the svc) to get those shims ASAP..

yes, you also can get those replaced when you get your 1st service (but to get the right shims, you need the engineer to measure the current shims thickness and valve clearance)

**martin_sky77** · 12-07-2011, 11:17 AM

Originally posted by mikewu View Post

@martin. i had a little chat with the service manager at my dealership and he confirmed that shims are not [officially] covered under warranty. although there may be exceptions. and the answer to my question as to why they are not covered under warranty was "shims are subjected to wear and tear, so it actually does not fall under the category of manufacturing defect." i did not find that as a satisfactory answer but thats all he said. and shims are not that cheap. to order a set you need to get the right measurements. and kinda have to wait for a while before you get the size you want. hope this helps

well, you can argue with the dealership then..coz even it's true that the shim are subjected to wear and tear, but it's not a fast moving part..and it won't wear / tear so soon (it last longer than the screw tappet)..
maybe it's not a manufacturing defect, but a manufacturing mistake, b'coz they put the shims with wrong thickness (also happened with CBR150R-Fi at thailand, they called it "helicopter sound"

)

yeah, it's indeed need some time to get them since there're so many shims with different thickness by 0.025mm increment..

**MeTaL_MaNiaC** · 12-07-2011, 11:20 AM

Originally posted by mikewu View Post

@martin. i had a little chat with the service manager at my dealership and he confirmed that shims are not [officially] covered under warranty. although there may be exceptions.

yes, the shims are not covered under warranty. I had a similar disscusion with the manager at vihaan and he showed me some book that stated this (i guess the workshop manual) and the exceptions may be a tappet noise right from the beginning and sorted at 1st service. My case was similar but due to non availibilty of shims then, i had to wait for second service which overlooked that exception and i had to pay for it. I recollect it being around Rs.360 for those tiny watch battery sized piece of metal that seemed pretty ordinary. And yes, even if shims may be subject to wear, they can still be used by them on some other bike which needs and meets the then required clearance (as told by the mechanic). Finding a perfect shim needs time and effort..

**MD24** · 12-07-2011, 11:21 AM

Originally posted by martin_sky77 View Post

since the svc currently don't have the shims, u can still use the bike with some minor issues (not problem)..the issues are something like poor mileage, lower power output, tappet noise, poor engine response, blahblahblah..it won't harm your bike since the tappet clearance are more than normal..

bike with shim will need shim replacement (with different thickness) not adjustment..i suggest you A.S.A.P. replace those shims, just keep "TERRORIZING" the svc (by phone or often come to the svc) to get those shims ASAP..

yes, you also can get those replaced when you get your 1st service

Thanks Martin once again
Just received a call from svc & they said the shim has to be replaced, which they don't have it in stock. They will place an order & they'll be able to get it within 15 days or so.

SO my wait starts from now......

SO Metal Maniac do you think they will have a hard time to fix my shim? If yes how will they actually order the right size for me. Secondly do you think they should be charging for the shim & labour even when we have driven just for 950kms? Whats your take on this??

**martin_sky77** · 12-07-2011, 11:26 AM

Originally posted by MeTaL_MaNiaC View Post

yes, the shims are not covered under warranty. I had a similar disscusion with the manager at vihaan and he showed me some book that stated this (i guess the workshop manual) and the exceptions may be a tappet noise right from the beginning and sorted at 1st service. My case was similar but due to non availibilty of shims then, i had to wait for second service which overlooked that exception and i had to pay for it. I recollect it being around Rs.360 for those tiny watch battery sized piece of metal that seemed pretty ordinary. And yes, even if shims may be subject to wear, they can still be used by them on some other bike which needs and meets the then required clearance (as told by the mechanic). Finding a perfect shim needs time and effort..

LOL

yes, the mechanic was right

**martin_sky77** · 12-07-2011, 11:36 AM

Originally posted by MD24 View Post

Thanks Martin once again
Just received a call from svc & they said the shim has to be replaced, which they don't have it in stock. They will place an order & they'll be able to get it within 15 days or so.

SO my wait starts from now......

SO Metal Maniac do you think they will have a hard time to fix my shim? If yes how will they actually order the right size for me. Secondly do you think they should be charging for the shim & labour even when we have driven just for 950kms? Whats your take on this??

no prob, everybody in here would do the same

you should get your bike to the svc to get the current shims thickness and valve clearance to get the right shims thickness..
i.e. current shim thickness (A) is 1.200mm (measured by a micrometer or a caliper), the IN clearance (BC) = (B - 0.16mm) + A
C

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