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**Divya Sharan** · 11-05-2015, 05:44 PM

Re: Do ALL bike's engine need reboring after 50k kms?

GBD approved!

The blunt answer is No! None of the bikes on sale go bust within 50k km.
It depends purely upon the riding pattern, maintenance and pro-active/preemptive replacement of parts.

My Karizma is 82k+ km old and its bore piston is fine. I replaced rings, timing chain, clutch plates etc at 77k km after noticing low oil levels and reduced performance (refer to ZMR thread). Never waited for white smoke to emanate from the exhaust.

**sauravalwaysurs** · 11-05-2015, 05:57 PM

Re: Do ALL bike's engine need reboring after 50k kms?

Originally posted by Divya Sharan View Post

GBD approved!

The blunt answer is No! None of the bikes on sale go bust within 50k km.
It depends purely upon the riding pattern, maintenance and pro-active/preemptive replacement of parts.

My Karizma is 82k+ km old and its bore is fine. I replaced rings, timing chain, clutch plates etc at 77k km after noticing low oil levels and reduced performance (refer to ZMR thread). Never waited for white smoke to emanate from the exhaust.

Thanks for approval and that is a nice maintenance. How did you do it? And does that mean that I messed up my bike's engine?

**Divya Sharan** · 11-05-2015, 09:05 PM

Re: Do ALL bike's engine need reboring after 50k kms?

Originally posted by sauravalwaysurs View Post

Thanks for approval and that is a nice maintenance. How did you do it? And does that mean that I messed up my bike's engine?

Maintenance of any vehicle is a cumulative procedure of keeping check on small variables. It's not only changing the engine oil and giving it a wash.
I follow this to the T! http://www.xbhp.com/talkies/motorcyc...ml#post1115265

**theironhorse99** · 11-05-2015, 09:12 PM

Re: Do ALL bike's engine need reboring after 50k kms?

Originally posted by sauravalwaysurs View Post

Hello fellow riders,

I am using a Karizma-R series and I have clocked over 48K kms on the bike. Recently I have got my bike repaired due to engine issues. Engine oil was leaking into the combustion chamber and bike was giving white smoke during morning start up (didnt observe white smoke on other time of the day/night). After getting my bike checked at SVC, they said that new piston, piston rings and re-boring need to be done.
I came across some threads on xbhp discussing about white smoke issues and re-boring of engine with new piston.
So my question is do all bikes need such kind of repairing after roughly 50k kms in their life-time (including premium bikes like ninja 300, R3 rc 390 etc)?

none of the bikes need engine over haul at 50k if maintained well..

for ninja's and CBR its much more as they are pretty reliable machines....

have never ridden or owned ktm's hence will reserve my comments.

**krishna77** · 11-05-2015, 11:25 PM

Re: Do ALL bike's engine need reboring after 50k kms?

Karizma is a highly reliable bike and shouldn't need this @ 50k. Seek a second opinion. And it also depends on how one particular bike has been run and maintained.

Sent from my Xperia L.

**sauravalwaysurs** · 11-09-2015, 11:53 AM

Re: Do ALL bike's engine need reboring after 50k kms?

Sorry for late reply. Seems like I screwed up sth in my bike. So, at present the bike's engine is kind of renewed and the SVC guy suggested me that I should Keep the speed limit to 40 kmph till 500 kms and after that I should bring the bike for servicing.
I had clocked over 500 kms and gave the bike to servicing. When I again asked the svc guy about speed restrictions now, he said that you can run your bike normally now.
I doubt if the break-in period after installation of new piston would be only 500 kms. Any suggestions?

**Divya Sharan** · 11-09-2015, 12:19 PM

Re: Do ALL bike's engine need reboring after 50k kms?

Originally posted by sauravalwaysurs View Post

Sorry for late reply. Seems like I screwed up sth in my bike. So, at present the bike's engine is kind of renewed and the SVC guy suggested me that I should Keep the speed limit to 40 kmph till 500 kms and after that I should bring the bike for servicing.
I had clocked over 500 kms and gave the bike to servicing. When I again asked the svc guy about speed restrictions now, he said that you can run your bike normally now.
I doubt if the break-in period after installation of new piston would be only 500 kms. Any suggestions?

500-700 km is more than enough but I don't understand why people fall for the 40 kmph funda even today!
Did you read the manual? Has Hero stated that 40 kmph should be maintained? What gear did you do 40 in? Please don't tell me 4th and 5th!

Maintain 4-4.5k RPM till 500 km with minor linear bursts upto 6k in between. That means you can ride at 60-65 kmph and not 40! The only funda is to keep varying the RPM upto a certain limit (6k in this case) so that the engine gets exposed to all operating situations/load.
What 40 kmph does is glaze the internals and lays the foundation of another bore job in 30-35k km.

**aargee** · 11-09-2015, 01:57 PM

Re: Do ALL bike's engine need reboring after 50k kms?

Originally posted by Divya Sharan View Post

The blunt answer is No! None of the bikes on sale go bust within 50k km.
It depends purely upon the riding pattern, maintenance and pro-active/preemptive replacement of parts.

Excuse me saar, my CPR wanted to know what was that blunt answer pls?

**Divya Sharan** · 11-09-2015, 03:34 PM

Re: Do ALL bike's engine need reboring after 50k kms?

Originally posted by aargee View Post

Excuse me saar, my CPR wanted to know what was that blunt answer pls?

Sir jee, the blunt answer was a "NO".
Then followed with my gyaan.

**deep007** · 11-09-2015, 04:25 PM

Re: Do ALL bike's engine need reboring after 50k kms?

Divya bro my discover 135 done around 62000km and it starts consuming engine oil when it cover 25000km.what would i do right now.can i retain my bike or sale it.

**Divya Sharan** · 11-09-2015, 04:40 PM

Re: Do ALL bike's engine need reboring after 50k kms?

Originally posted by deep007 View Post

Divya bro my discover 135 done around 62000km and it starts consuming engine oil when it cover 25000km.what would i do right now.can i retain my bike or sale it.

Get the valves and valve seals checked. Also piston rings. Why sell?

**Dipan12** · 11-09-2015, 06:27 PM

Re: Do ALL bike's engine need reboring after 50k kms?

Originally posted by Divya Sharan View Post

500-700 km is more than enough but I don't understand why people fall for the 40 kmph funda even today!
Did you read the manual? Has Hero stated that 40 kmph should be maintained? What gear did you do 40 in? Please don't tell me 4th and 5th!

Maintain 4-4.5k RPM till 500 km with minor linear bursts upto 6k in between. That means you can ride at 60-65 kmph and not 40! The only funda is to keep varying the RPM upto a certain limit (6k in this case) so that the engine gets exposed to all operating situations/load.
What 40 kmph does is glaze the internals and lays the foundation of another bore job in 30-35k km.

In my case I kept the rpm range between 4.5 to 5.8 and my speed range was between 50 to 70 kmph within 500 KM , after 500 to 1000 KM the Rpm range rose to 5.5 to 6.5 RPM and the speed was between 50 - 80 kmph . And when I first brought the bike I changed my engine oil , cleaned the oil filter , checked the Centrifugal oil Filter , Spark Plug Check and gapping distance check , air filter check and brakes check . This was done within 100 KM , and I want to say to everyone please take a proper care of your bike as like a first born child . I took care and at 3079 KM my Karizma is Suppppper Smooth like petrol (butter word seems old) . Now my top speed lies within - 125 kmph - 138 kmph . AND TO EVERY ONE OUT THERE every engine needs some time even after running period to get smooth some happens at 3000 KM , some at 5000 KM and some at 7000 KM . I used to have and still do have - Bajaj Discover 100 M , where I took good care of the bike and after 7000 KM my got reallly smooth which includes regular maintenance at 2000 KM . To say the truth I dont care how much money is spent on maintenance . IF YOU WANT YOUR BIKE TO BE PERFECT IN ITS CC SECTION CLASS SPEND ETIHICALLY DONT BE A KANGUS ! . I wasn't so I got a best commuter bike - Discover 100 M and best Sports cum Touring bike - Hero Karizma R 2015 Model .

**Divya Sharan** · 11-09-2015, 06:42 PM

Re: Do ALL bike's engine need reboring after 50k kms?

Originally posted by Dipan12 View Post

In my case I kept the rpm range between 4.5 to 5.8 and my speed range was between 50 to 70 kmph within 500 KM , after 500 to 1000 KM the Rpm range rose to 5.5 to 6.5 RPM and the speed was between 50 - 80 kmph .

These numbers don't add up:
In 5th gear -
4.5 - 5.8 k RPM = 68 to 87 kmph
5.5 - 6.5 k RPM = 82 to 98 kmph

(ZMA-R has 15 kmph per 1000 revs and ZMR has 16 kmph per 1000 revs in 5th gear.)

**Dipan12** · 11-09-2015, 07:14 PM

Re: Do ALL bike's engine need reboring after 50k kms?

Originally posted by Divya Sharan View Post

These numbers don't add up:
In 5th gear -
4.5 - 5.8 k RPM = 68 to 87 kmph
5.5 - 6.5 k RPM = 82 to 98 kmph

(ZMA-R has 15 kmph per 1000 revs and ZMR has 16 kmph per 1000 revs in 5th gear.)

I can't acuuratly say the RPM reading as I rarely see the speedometer . It was my guess and few times I saw but can't say which speed it was in that RPM Range . Sorry I am not an expert like other bhp ians but I am learing !

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Do ALL bike's engine need reboring after 50k kms?

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