Announcement

**Brat** · 09-12-2011, 10:25 PM

Originally posted by ashwinprakas View Post

Wow!!! Can'nt believe im right.... Sir, guess am not a bad student after all

.

And sir, My bike's recently been producing the chil-chil sound when hot, I believe its not the tensioner since I've had it replaced @ 2k.(Now completed 4k)
The SVC guys after their 2sec examination said it was valve noise and said they'll clear it at next service. I dont know why, but I believe they said so to shoo me off...

.

So sir, is valve noise harmfull??? And can you give me a differential diagnosis if any????

Valve noises are more prominent with revs and is uncommon unlike tappet noise which mostly occur during either cold starts or when extremely hot.

Loose/incorrect tappet clearance, bad/low oil levels, incorrect carb tuning, worn tappets all contribute to tappet noise, while issues like rocker arm not seated correctly, oil flow to cam being insufficient would denote valve noise. Some of the symptoms for you to be able to tell based on the symptoms are sudden drop in mileage (while no other params have changed like fuel quality, AFR, riding style, etc), sluggish pick-up and mid-range torque.

Last time i had to replace the busted valves and left rocker arm in the ZMA, it had clocked 43,000k and my oil change routine was not consistent. I dont think you would be dealing with something of this scale with your ZMA being pretty new. Tappet noises are quite common if you rip aggressively. Just make sure, when you are done ripping, allow sometime for the engine to cooldown by cruising on mid-revs for 10 or so mins and you wont even notice this issue anymore.

EDIT: Be sure to let the SVC guys know of your symptoms and why you think it is a tappet/valve noise issue based on your experience or they may take you for a ride.

**psr** · 09-12-2011, 10:28 PM

Originally posted by ashwinprakas View Post

Guess I'll ignore it then.. And just to quench my curiosity.
Sir, can you tell me what causes valve noise?? And what are its after effects too...

Don't ignore for long...continuous running with tappet gap will make your engine run lean and is not good for engine, besides causing grooves in rocker,and cam.

Originally posted by Vishakh View Post

but my bike is younger than ashwin's but no such problem and when i compared the engine sound to a 1.5k km old zma of my friend's my engine was making a deeper growl where as his was a bit pitchy guess its because of oil (20w 40 thanks to PSR sir and other experts here

)

And i met ashwin yesterday and i think the bike was making noise like that not because of ripping, i strongly feels like its wrong valve setting not sure though

Adjusting the valve clearance is tricky and needs feeler gauge and ability...if the ASC mech lack this then they will invariably try to avoid it.
Glad you are using 20w40 which will give better engine protection,than 10w30

**curse** · 09-12-2011, 11:02 PM

Be sure to let the SVC guys know of your symptoms and why you think it is a tappet/valve noise issue based on your experience or they may take you for a ride.[/QUOTE]

Adjusting the valve clearance is tricky and needs feeler gauge and ability...if the ASC mech lack this then they will invariably try to avoid it.

+1 Had a very hard time at svc yesterday to get the tappets adjusted.They just dont want to do that and will give silly Reasons or will completely deny that the engine is making any irregular noises.A mechanic suggested me castrol gtx for solving the problem and said he is using in many zma's which come to svc,had to push them hard,left the bike in svc at 6pm and told them to work on it the next morning so that engine cools down completely.Went today afternoon and first checked the tappet covers to find out if they have touched them or not found oil stains and scars on bolts a bit relief,but it was short lived rode the bike for some 10 kms and the noise coming and it has become a bit worse than before.

.Dont know what to do now.They are not competent to do such work.Only option i think is to find a good mechanic outside svc.

**acs1207** · 09-12-2011, 11:18 PM

Originally posted by asif View Post

^^^
I guess on the ZMA the TPFC is a switch rather than a cable that needs/may to be disconnected. You may disconnect the switch as done above with the cable.

TPFC in CBZ and TPS in Kzma

Originally posted by Vishakh View Post

bro can you tell the advantages as well as disadvantages of doing it on karizma?

Different name , different purpose , different method !!

Originally posted by Aneesh@4GHz View Post

Heard that this will increase mileage,Ashwin also told me the same before few months,I am not sure about this,need reply from psr sir.

Wait for his reply.

Glad you did that !

Originally posted by psr View Post

I had taken the pain to write about a loose contact problem in my ZMA TPS ,and how I found,what effect it had....Please go back a few pages and see.
Disconnect the TPS in ZMA and find out for yourself.> There are three wires from ZMA TPS and connects through a connector under Petrol tank

If you don't see and learn then you have to do and learn ( in mallu talk it's 'kandariyathavan kondariyum!' !.

Originally posted by Vishakh View Post

sir saw your posts related to loose contact of TPS

. But is there any advantages disconnecting the TPS even if there is no problem with it? Aneesh posted about the increase in mileage, anything other than that? Also want to know the disadvantages as well

. From the posts here i think disconnecting it is a bit complex and technical job for me

so dont want to take a risk on fiddling with the TPS

Disconnecting it's not at all complex . Living with it disconnected is !!

Originally posted by psr View Post

The TPS in Karizma is continuously variable , unlike in other bikes like Pulsar..This means the ignition timing is linear and not in steps,and removing will make the bike run very poor...Try it and find out for yourself..

continuously variableaccording to the amount of throttle you give .

Originally posted by ashwinprakas View Post

I think guys here are confusing TPFC with TPS.
Correct .
AFAIK.

TPFC's an additional cable going from the throttle to the carb, its job is to activate the choke according to throttle position.
TPS's present on ZMA's that varies the spark intensity based on the throttle position,
You've almost nailed it there !

TPS - Not much info on the above, cause I've not tried it. But theoretically disabling this'll give comparatively less mileage and you'll loose the ROCKET part of ZMA that comes after 4.5~5k. Psr sir, correct me if im wrong.

Originally posted by ashwinprakas View Post

Wow!!! Can'nt believe im right.... Sir, guess am not a bad student after all

.

Keep it up !!

Replies also in bold .

**acs1207** · 09-12-2011, 11:36 PM

A small TPS related discussion .

[Help]: Karizma TPS on other carbs - xBhp.com : The Global Indian Biking Community

http://www.xbhp.com/talkies/help-me/7976-help-karizma-tps-other-carbs.html

Wanna know whats wrong with your bike or or looking for the best mechanic in your town? Ask here!

**ashwinprakas** · 09-12-2011, 11:37 PM

Originally posted by psr View Post

Don't ignore for long...continuous running with tappet gap will make your engine run lean and is not good for engine, besides causing grooves in rocker,and cam.

Sir, doubt?????
Meaning I should maintain ride intervals???? Like 10mins after every hour???
Or like what Brat bro said. When the sound occurs ride in mid for 10 mins and then pop back up????

And isnt ZMA the ride that can go 130kmph for like a whole day continuously???

**curse** · 09-12-2011, 11:52 PM

^^Yes zma can do 100kmph all day,problem occurs when you rev hard in lower gears and do sudden acceleration.

**ashwinprakas** · 09-13-2011, 12:14 AM

Originally posted by curse View Post

^^Yes zma can do 100kmph all day,problem occurs when you rev hard in lower gears and do sudden acceleration.

So I take it gentle and only Rev hard in final gear and the prob goes away???

**curse** · 09-13-2011, 10:44 AM

Originally posted by ashwinprakas View Post

So I take it gentle and only Rev hard in final gear and the prob goes away???

If your tappets are already loose than there is no other option other than getting them adjusted.Revving hard in low gears and repeated sudden acceleration will bring back the problem.

**Aneesh@4GHz** · 09-13-2011, 10:54 AM

Originally posted by curse View Post

If your tappets are already loose than there is no other option other than getting them adjusted.

@ Ashwin

Get it adjusted bro.

**imjoshee** · 09-13-2011, 11:29 AM

Sorry for the OT : I have a brand new Joe rocket riding jacket which is not fitting me. Anybody intrested in buying.

PM for further details.

**asif** · 09-13-2011, 12:54 PM

Originally posted by acs1207 View Post

A small TPS related discussion .

http://www.xbhp.com/talkies/help-me/...her-carbs.html

Thanks for the share @ acs1207

And now i really don't understand why PSR suggests not to disconnect the switch.

The TPS is continuously varying that is when its connected, when its not should give just one kind of performance. This is what i have been able to figure out as of now.

**curse** · 09-13-2011, 01:44 PM

My Karizma Mods & Ideas! - Page 4 - Team-BHP
Check this link from Tbhp tps is also discussed a bit.

**selvin rebz** · 09-13-2011, 02:47 PM

can anyone tell me, how to change karizma headlight without removing the fairing??

is it possible???

**Aneesh@4GHz** · 09-13-2011, 03:25 PM

Originally posted by selvin rebz View Post

can anyone tell me, how to change karizma headlight without removing the fairing??

is it possible???

I dont think its possible in ZMA,Its possible in ZMR.

Went to svc and estimated the damages,All damages will cost me nearly 24000rs.50% on Fiber and Metal parts.

Announcement

Karizma/Karizma R Ownership Experience

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment