Re: When the mean becomes meaner, the RTR190

Condition of air filter and carb tune?

Re: When the mean becomes meaner, the RTR190

ok now I'm very noob here :/
how do i check the condition of air filter and/or carb tuning??

Edit : i've clocked 900+ kms on the RC setup now. things that i have noticed :

• RPM drops slower compared to stock.
• oil leak from engine.
• and this happened today, started engine and let it to warm up for few seconds, then removed the DB killer. noticed spots of oil on the it :/

guys need some advice

Re: When the mean becomes meaner, the RTR190

Check if your air filter is dirty and it is oiled properly, post a picture of the air filter. Carb tuning is a bit complicated for a "noob" and you may need the help of an experienced mechanic while tuning the carb, may need upjetting too, but I guess the upjetting part has been taken care by Mr. Joseph Joel already.

Re: When the mean becomes meaner, the RTR190

[MENTION=36234]Kirankj1724[/MENTION] : Can you please post more details on what all has been done on the bike? It is clear you have got bigger bore and FFE. Was headwork also done? Was carburettor and filter also changed? Also how old was your bike before this upgrade?


My guess is the carb and filter is stock and most probably the carb is untouched ( as was in my case initially) but he had recommended me to make the carb needle rich by setting the needle clip at one position lower (you can tell your mechanic this, he will understand what to do).


The bike would otherwise be running slightly lean, which can also be the reason for reduced top speed. Also let the bore settle a bit, cover more miles and try it later once it is done 2k or 3k kms. Since you say there is oil leak & there was oil in db killer too, please dont try high speeds till you resolve it.


Also like others have said here, check if air filter is dirty (touch it and see if your fingers become black ) and clean it if necessary.

Re: When the mean becomes meaner, the RTR190

Thanks Cleaner and Adarsh for your response

my current setup is :

• BB kit with head
• bigger carb setup with simolta filter
• FFE

i had clocked 27k odd kms before the setup was installed on my bike.

i will try and get back with the updates on condition of filter asap

Re: When the mean becomes meaner, the RTR190

I'll be honest, i really don't follow your thread, just stumbled upon it and saw this video.

The exhaust note is therapeutic. Its magical, orgasmic, pure ecstasy.. To cut the story short, i LOVED it.:thumbup:

Sent from my A9+ using xBhp Connect mobile app

Re: When the mean becomes meaner, the RTR190

Small update from my side :

After a lot of discussions with our senior member @psr sir, I have decided to revert back to stock carburettor and stock filter.

Reasons:

1. The bigger 33mm carb was causing instability at sub 3k rpms. It was also affecting cold starts. The reason being that the carb was too big for the bike and at low rpms, it cannot supply steady amount of fuel like the stock carb. There was noticeable improvement to top end performance though, which can also be attributed to the free flow air filter.

2. FE took a hit. Riding at 3/4th to wide open throttle on highways resulted in <30kmpl.

3. The exhaust note becomes even louder with this carb + filter which will give you a sense of more speed/ acceleration when in reality the improvement is not as much. (This was evident when ridden with ear plugs!)

4. I plugged the simota filter to stock carb with bigger main jet and the top end performance was almost similar to that of the bigger carb and also having stock like low end performance. This was just a test to confirm the behaviour.

5. The reason for reverting to stock filter was that the engine reliability is compromised when you use free flow filters like Simota or K&N irrespective of whether the carb is tuned for it or not. This is mainly because the filtration doesnt even come close to that of stock filter. One can get better top end by using this filter with proper carb re jetting but at the cost of engine problems in the long run.

I have done 5k kms with 33mm carb and simota filter. Now these two are safely kept away. This carb can make a lot of difference for bigger capacity bikes like the 500cc bullet, where it can be used to its full potential.

Also got the complete treatment for the bike done on the weekend,

New clutch plates installed. Also got the clutch cables changed.
Faulty clutch bell replaced.
Motul 300V 15W50, trying out for first time.
New swingarm bushes installed.
New coneset installed.
New DOT4 brake fluids.

And the result? The bike has become smoother than it ever was! Redline has no vibes too so you dont want to change gears at all Also stalled the bike many times in first gear due to completely new behaviour of bike (due to new clutch plates). Have to get used to it now.

With this, mostly my hotrodding days are over Since this setup ( bb kit, ported head, ffe, stock carb & filter) is reliable for commuting/touring and offers more peace of mind than having bigger carb or free flow air filter or high lift camshaft.


@Kirankj1724 : Now I guess you will be worried after reading my above comments on the bigger carb + filter, but if it has been tuned better or if it is a different carb than mine or if you are not facing low end issues, then maybe you can continue using it but do remember the facts posted above. And you can ignore my previous post about carb needle setting since it was meant for a stock carburetor. And I am sure Simota filter is clean, it wont be that dirty with just 900kms unless you have ridden only on mud roads

One important question, have you changed the engine oil in this 900kms? If not then it is the first thing you have to do after reading this post.
And since your ODO was 27k kms, was the clutch plates, chain sprocket set changed? Because all these will affect everything, performance, FE etc.

Do post details regarding above questions.

Thanks a lot Pratik! It indeed is a sweet thing to listen to when you just wring the throttle. Now the sound has reduced a bit but is enjoyable nonetheless

Re: When the mean becomes meaner, the RTR190

Welcome back to stock noobs club!

Re: When the mean becomes meaner, the RTR190

Adarsh Bk...It is Good to see that you have understood and successfully been able to tune your Carburetor.....Not Many had done this...Your perseverance and hunger for knowledge had definitely made you achieve this..you are no longer an uninformed biker now..
I wish you Good Luck.
Ride Safe

Re: When the mean becomes meaner, the RTR190

Didnt you read it fully?? Only carb and filter is stock!


PSR sir, thanks for the compliments and thanks again for all your help. This has been an amazing learning experience for me since the day I got the kit!

Regarding carb tune, my suspicion is that a 127.5 main jet is needed to make the fueling perfect. I am yet to do plug chop test at WOT to confirm the same.

Re: When the mean becomes meaner, the RTR190

hello adarsh
regarding low end issues, haven't noticed anything yet but ,yes there are cold start issues.. idling is perfect.. no jumps at all..
and regarding air filter, its pretty much clean.. checked it, has only light dust deposits, nothing major..

I've changed engine oil + oil filter at 500kms..
clutch plates were changed at 23k odd kms and also got chain sprocket kit changed few days back..

the low end and mid range is amazing as of now.. only worried of top end... its not that free as i see videos of JOEL'ED RTR's on YouTube.. struggles a bit in 3rd and 4th.. and almost refuses to climb in 5th(above 10k rpm).. i really feel it has something to do with carb tuning..

spoke to my mech about oil leakage, he says its probably because of improper sealing of engine block.. (the paste used to seal engine is not applied properly)

right now my major worry is rpm drop... its not that it gets jammed right at the spot , but drops significantly slower than stock..

and also I'm not able to get hold of JOEL , probably he's busy with his works.. waiting for his response to sort out things..

i will try to cover more kms as u suggested and the decide on what has to be done
thanks a lot for helping me out.. I'm not that knowledgeable about hot rodding stuffs.. so i would require a lot of help from experienced fellow XBHP'ians like you

Re: When the mean becomes meaner, the RTR190

I know, was just pulling your leg! I hope your BB kit outlasts the bike.

Re: When the mean becomes meaner, the RTR190

@Kirankj1724 :

It is very surprising that the low end/idling is fine, but anyways, that is one less thing to worry about

Good to know that engine oil, clutch plate, chain are all fine. Since you say top end is bad, then it could be because of the air fuel mixture being too rich.

Also when was the spark plug changed?

You say it struggles in 3rd and 4th gear. It doesnt struggle in first two gears when you rev upto 8k rpm? Then it could also be a gear box problem.


And you say it doesnt rev post 10k rpm in fifth gear. The speed at 10k rpm in fifth gear is 130+kmph!! And obviously the bike almost reached its limit around that rpm. But if the rpm is around 10k and speed isnt around 130, then there is some other problem with the bike. (Could be one of the above mentioned ones).

I am not sure about the oil leakage problem, your mech could be right. And the slow rpm drop again has to do with carb tuning.

And thanks man, but I am not at all experienced when there are so many senior members here in xbhp.
Just consult @psr sir regarding all your issues. You cannot get better help from anywhere else!! (Sorry psr ji for putting this on you )

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Thanks for the wishes. Bhagwan aapka bhala kare

Re: When the mean becomes meaner, the RTR190


Hello adarsh

silly doubt though , regarding top end issue, is it air fuel mixture being rich or lean??
and spark plug was replaced just before riding into RC workshop

how do i check if its Gear box prob?? gear occasionally slips to 2nd while shifting from 2nd->3rd, this was present from quite a long time.. other than this there s no issue in crossing 8k+ in 1st and 2nd gear..
it struggles a bit in going past 9k in 4th and 5th it takes a loooong time to hit 10.. i maxed out 124 in a straight stretch crouching on the tank..

where as my friend on a fully souped up RC Karizma went past me with ease

and to psr sir , here i come

Re: When the mean becomes meaner, the RTR190

With bigger carb, it is most likely that the engine is running rich at higher rpms (lower FE also says same story). But if it is lean, then it will be very dangerous for the engine.

Now are you really sure the rpm at 5th gear reaches 10k? Because in my bike, it does speeds more than 130kmph at that rpm (And it wont rev more than that, maybe a little). Clearly your engine is trying to do its job, but something else is not transmitting the complete power to the rear tyre (I suspect gear box).

Also one more thing, please try not to do high speed runs until you fix the oil leak issue. If the level reduces drastically, it can be fatal to the engine & at high rpms, the risk is even more.

Just wait for what psr sir have to say regarding this.