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**krishnan6015** · 03-30-2010, 07:50 PM

Originally posted by prakash_mvpa View Post

Knocking when at speeds upto 50-55kmph.also in 1st and 2nd gear too.and the Problem is more pronounced in the town traffic.If I shift down and apply throttle ,there is this "missing" thing more.

At 80kmph ,if I twist the throttle a little more ,knocking sound is heard.

I gave back the bike today for thorough inspection.carbs/jets and air filter cleaned.yeah tappet and spark plug condition needs to be checked.
Clutch Slipping also has to be checked.
Thanks for that - CDI kit thing.I will ask them.

Petrol might also be the culprit. Do use only un-leaded petrol . I faced similar problem when I was using Shell petrol. Once I switched back to HP everything became normal.

**theguitarfreak** · 03-30-2010, 09:47 PM

Jerking at low rpm ( mostly at and around 3k) rpm is just pissing me off badly now. No matter how much i try to ignore it its too evident when im moving in slow traffic. Reported it to the SVC guys but they couldnt solve the problem. The engineer even drove the bike but he tells me he couldnt see any such thing. If this thing isnt solved by them i may be forced to sell my bike. Its really irritating.

**lijok** · 03-30-2010, 10:28 PM

Originally posted by theguitarfreak View Post

Jerking at low rpm ( mostly at and around 3k) rpm is just pissing me off badly now. No matter how much i try to ignore it its too evident when im moving in slow traffic. Reported it to the SVC guys but they couldnt solve the problem. The engineer even drove the bike but he tells me he couldnt see any such thing. If this thing isnt solved by them i may be forced to sell my bike. Its really irritating.

wo... dont do something like that buddy...

its just a matter of proper tuning of the carb.. I had this prob, after i messed with the carb... both at low rpm and high rpm... so when i went to the guy who fitted the K&N filter, I told him about it... and he tuned the carb (there are two setting, one for idle and the other for cruising i think).. once that was done, the problem vanished.

Find a good experienced mech and get him to tune the carb for you... believe me, it will solve the issue...

**abhichotu.abhi** · 03-30-2010, 10:29 PM

Originally posted by theguitarfreak View Post

Jerking at low rpm ( mostly at and around 3k) rpm is just pissing me off badly now. No matter how much i try to ignore it its too evident when im moving in slow traffic. Reported it to the SVC guys but they couldnt solve the problem. The engineer even drove the bike but he tells me he couldnt see any such thing. If this thing isnt solved by them i may be forced to sell my bike. Its really irritating.

At 3K in any gear bike should not jerk. My few suggestions are:

1) Try and get your spark plugs cleaned and AFR retuned.
2) If necessary cleaning of carburreter.
3) Check Air filter(I strongly believe that it is not culprit here, but precaution is better.)
4) Check if jerks are arising when on a constant throttle or speed OR they creeps up when you open the throttle??

**rennycornelius** · 03-30-2010, 10:37 PM

Originally posted by theguitarfreak View Post

Jerking at low rpm ( mostly at and around 3k) rpm is just pissing me off badly now. No matter how much i try to ignore it its too evident when im moving in slow traffic. Reported it to the SVC guys but they couldnt solve the problem. The engineer even drove the bike but he tells me he couldnt see any such thing. If this thing isnt solved by them i may be forced to sell my bike. Its really irritating.

Just clean the small or low jet and it will solve your problem.
And as lijok told tune your carb after the cleaning.

**theguitarfreak** · 03-30-2010, 10:47 PM

Originally posted by lijok View Post

wo... dont do something like that buddy...

its just a matter of proper tuning of the carb.. I had this prob, after i messed with the carb... both at low rpm and high rpm... so when i went to the guy who fitted the K&N filter, I told him about it... and he tuned the carb (there are two setting, one for idle and the other for cruising i think).. once that was done, the problem vanished.

Find a good experienced mech and get him to tune the carb for you... believe me, it will solve the issue...

The SVC guys had tuned the carb when i reported this problem the first time.
But that didnt solve the issue. And i dont get the jerks at higher rpms. Only at and around 3k.

Originally posted by abhichotu.abhi View Post

At 3K in any gear bike should not jerk. My few suggestions are:

1) Try and get your spark plugs cleaned and AFR retuned.
2) If necessary cleaning of carburreter.
3) Check Air filter(I strongly believe that it is not culprit here, but precaution is better.)
4) Check if jerks are arising when on a constant throttle or speed OR they creeps up when you open the throttle??

The jerks are there when im riding on a constant throttle.

Originally posted by rennycornelius View Post

Just clean the small or low jet and it will solve your problem.
And as lijok told tune your carb after the cleaning.

The engineer told me that they would clean the carb at my next servicing. Now does that include cleaning the jets?

**iBerry** · 03-30-2010, 10:48 PM

I knew one day I would eventually fall with the stupid TVS tyres. I was riding between 50 and 60kmph, on a right hander turn on the highway, on a bridge, I wasnt even leaning much and WHAM! I did a 10 to 15 meter slide. I was wearing full body protection so i didn't get hurt, but my jacket and knee pads looks as if it's been sliced right through. Just got the bike back from the SVC and got all damaged parts replaced. Now I'm really gonna change the tyres.

**rennycornelius** · 03-30-2010, 10:49 PM

Originally posted by theguitarfreak View Post

The engineer told me that they would clean the carb at my next servicing. Now does that include cleaning the jets?

Stand on his head while the SC guy cleans your carb, otherwise he wont do it even after giving you in writing.
and make sure he takes out both the jets individually, cleans them with a toothbrush by dipping it in clean petrol then blows high pressure air through them.

**rennycornelius** · 03-30-2010, 10:51 PM

Originally posted by iBerry View Post

I knew one day I would eventually fall with the stupid TVS tyres. I was riding between 50 and 60kmph, on a right hander turn on the highway, on a bridge, I wasnt even leaning much and WHAM! I did a 10 to 15 meter slide. I was wearing full body protection so i didn't get hurt, but my jacket and knee pads looks as if it's been sliced right through. Just got the bike back from the SVC and got all damaged parts replaced. Now I'm really gonna change the tyres.

Sad to hear about your fall ,but TVS tyres are not that bad in dry tarmac specially in summers where the tar roads almost melts making anything made up of rubber stick like glue.

**lijok** · 03-30-2010, 11:01 PM

@iBerry... sorry to hear about your fall buddy... hey, you wore riding gear, and you walked away unhurt... Well, TVS tyre are good only for dry tarmac; anything else you need to be extra careful..

**iBerry** · 03-30-2010, 11:54 PM

Yeah the TVS tyres are good in dry roads, when I fell the road wasn't wet but it was in the shaded area, and was kinda tilting for the rain water to flow across. I ride through this same road every 5 days and eventually reach this spot after 93kms and never once did I fall. Although I did have a similar experience on a RTR160 (the one without the tank scoops). It was on this same road, on similar conditions, on a shaded part but not wet either. And that time I really hurt myself, I lost confidence on my old RTR160 and eventually sold it. From what I can remember, I did feel the front lose grip. Last wednesday I did an 806km ride in one day with jam packed saddle bags and half of the ride was through long curvy roads and not once did the tyres lose grip. I also increased my top speed recorder from 125 to 129 and got an average 0 to 60 of 4.7sec and the bike performed flawlessly. Oh well....

**lijok** · 03-31-2010, 01:30 AM

Originally posted by iBerry View Post

Yeah the TVS tyres are good in dry roads, when I fell the road wasn't wet but it was in the shaded area, and was kinda tilting for the rain water to flow across. I ride through this same road every 5 days and eventually reach this spot after 93kms and never once did I fall. Although I did have a similar experience on a RTR160 (the one without the tank scoops). It was on this same road, on similar conditions, on a shaded part but not wet either. And that time I really hurt myself, I lost confidence on my old RTR160 and eventually sold it. From what I can remember, I did feel the front lose grip. Last wednesday I did an 806km ride in one day with jam packed saddle bags and half of the ride was through long curvy roads and not once did the tyres lose grip. I also increased my top speed recorder from 125 to 129 and got an average 0 to 60 of 4.7sec and the bike performed flawlessly. Oh well....

hehe... dont worry about the fall bro... consider it part of our biking life... yet another day, yet another fall... leave it behind, but take away the experience gained....

**prakash_mvpa** · 03-31-2010, 02:21 AM

Originally posted by krishnan6015 View Post

Petrol might also be the culprit. Do use only un-leaded petrol . I faced similar problem when I was using Shell petrol. Once I switched back to HP everything became normal.

only unleaded petrol is available here(and I think elsewhere too) Buddy and remember from April it is BS-IV in major Cities and from October 2010 ,BS-III standards for whole India.and I fill from a known petrol pump(BPCL).If you meant "premium" petrol ,even roadside mechanics will warn "it can consume piston rings".... kind of advices.always stayed away from premium petrol.In Mine case ,it does not seems to be a clogged carb jet etc.Given the Bike Yesterday to tvs service.hopes they will check the conditions of valves.

**chicane1879** · 03-31-2010, 05:48 PM

@guitarfreak

Even my bike had the same hiccup issue(though it was mild).I only noticed it while accelerating slowly/while riding at constant 3k rpm. After i complained about the issue in the svc, they completely disassembled the carb and cleaned the individual components including the jets. But then opening, cleaning and fitting the carb is one thing and the tuning is another.Tuning is what is utmost important and there will be significant difference in performance(read:loss) if not set properly.

**abhichotu.abhi** · 03-31-2010, 06:18 PM

Originally posted by theguitarfreak View Post

The jerks are there when im riding on a constant throttle.
The engineer told me that they would clean the carb at my next servicing. Now does that include cleaning the jets?

Thus, The cleaning of carb. should solve the problem.

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