The R15 Garage Thread

[Aparajith]

Thnx yaar.. Anyone from chennai removing it?

Even I wanna get it done. We will talk about it on Sunday! Hold ur horses till then!

[sk8er_joe]

Even I wanna get it done. We will talk about it on Sunday! Hold ur horses till then!

yep.. "ll see on Sunday....

[suhail_kapoor]

Query

I met an R15 owner today who earlier had noise and vibes problem in his bike post 6-7k kms. He said that one Yamaha senior engineer who was on visit to showroom, suggested mechanic to reverse the front sprocket, and after that all vibes went away and sound was lot smoother.

The logic being that the front sprocket cuts or scrubs teeth from the inner half leading to the increased vibes and sound.

To my brain this is a 50-50 situation not sure how true or false can it be, can people with more knowledge about bikes verify this explanation please.

Joel, i am sure you must have worked on your chain while tuning your ride, did you notice any such thing ???

[Joel]

Joel, i am sure you must have worked on your chain while tuning your ride, did you notice any such thing ???

Frankly, I have not even bothered to even look into the sprokets. I only lube the chain once a while and thats about it.
The reversing logic is true however.

[Garry_rxz]

Wont removing the cat-con cause those popping and misfiring sounds?

[Garry_rxz]

Wanted some help regarding the FID.
AIM: Street bike, for commuting purpose, but a bit QUICKER than stock R15.

I have a spare free flow air filter with me.
Well i wont be spending a single penny doing all this work.Ive called a so called Engineer (from yamaha station)from Lucknow, and he said he can carry a FID along with him.
Wanted to do it just for an experiment sake. Thats it.
Will work out a free flow soon.

I remember reading Navnish's post,that he has changed the stock air filter and tuned the AFR. and its much much better as compared to stock. Some light please.

Question is : Should i go with the stock filter, or a UNI...... at what CO % ( approx ) should i stop. What points should i stop at using :
1)a UNI
2)Stock filter

Stock being 3.4-3.5% by how how much points should i increase CO% in each step.

Garry..

[Joel]

I've answered you on the other forum. Read my reply again.
You are not gonna gain anything by putting a filter, except for loosing on the torque across the range very badly and making the bike even more peaky. Upping the CO will only make a stock bike unwantedly rich. At the max, u can try going +1 on CO but again no gains on that.
Dont refer to Navnish's bike, coz it was not stock and its not stock now either. I've told him what to do and thats what he has done.
Trust me, all this fiddling around without knowing what you are doing will only mess-up a good bike which is worth some serious bucks. A freeflow built without data will only make the bike go backwards. Most feel, any large pipe will improve performance. There are so many parameters that go into building a pipe.
Right here on xbhp, I see many people talking about building pipes and doing stuffs with exhausts. If you are building it without knowing your stuff, its straight down the drain. Or if you are serious, u will need to do a lot of trail and error on building pipes. By then, you would have burnt a hole in your pocket and engine too
So just decide which route you wanna take.
keep in mind, this engine is very sensitive and its not a CT100 to play with. Its worth 3 CT100s.

[Garry_rxz]

Thanks Joel.
The confusion was because the post #14 in page 2 says K&N on stock engine + FID tuning = much better response.Thats why.

Anyways, if this is not the right step. Can you pls advice, or give a hint how should one proceed with the R15 to get a slightly better performance.

[Joel]

Thanks Joel.
The confusion was because the post #14 in page 2 says K&N on stock engine + FID tuning = much better response.Thats why.

Anyways, if this is not the right step. Can you pls advice, or give a hint how should one proceed with the R15 to get a slightly better performance.

Dude, that was not a stock engine. I had tweeked the engine and then shoved the K&N.
There is nothing that you can do to improve some performance without fingering the internals . I've said already, that engine is pretty much maxed in stock form itself. The intake is already optimised very well and so is the stock exhaust. Anything u try, trust me you'll loose out.

[Garry_rxz]

Aaah!!
Well Thanks !

[anirudh fz1]

Dude, that was not a stock engine. I had tweeked the engine and then shoved the K&N.
There is nothing that you can do to improve some performance without fingering the internals . I've said already, that engine is pretty much maxed in stock form itself. The intake is already optimised very well and so is the stock exhaust. Anything u try, trust me you'll loose out.

i have to buy a quality tool kit , which are the good ones & their costs

[Shanz]

i recently installed the automech free flow exhaust on my r15.the mechanics say as i ride more the ecu will reset it self and my performance will furthur improve .is it true?

Rofl..
Salute to such mechs..
No more comments!
Hope u understood the answer.
<Posted via Mobile>

[satyenpoojary]

i recently installed the automech free flow exhaust on my r15.the mechanics say as i ride more the ecu will reset it self and my performance will furthur improve .is it true?

Congratulations, you got ripped

I am not talking about the exhaust, but about the Self-resetting-ECU.... the ECU is not powered by a EPROM, so it will not get reset.... you can try the SVC to get hold of the unrestricted ECU and try your luck if it has adequately close mapping to the tune of your exhaust!

BTW How does that exhaust feel so far?

[karthik_R]

Pls ignore if you guys have already come across ..but this is a new find for me...

Two bros exhaust kit for the R15..

Two Brothers Racing :: Yamaha R15

The image on their website looks photoshopped, but i checked the instruction manual to confirm that...

[Joel]

Heard that in Bombay every tom dick and harry is into building exhausts for the R15. Automech, then some pune fellow, then some guys from bike-india etc are all trying to prove some exhaust-ic point
Funny part is they are priced like then come with some assured dyno values. 8-9k is not cheap.
Exhaust systems have a thumb rule. You reduce the restriction in any 4-stroke engine, and ofcourse your acceleration will improve a bit, but not to the levels you expect. Any tom or dick can throw away the stock canister and make a freeflowing one and expect some 0.5secs gain to 60 and 100kph and a few magazines are featuring them like its some rocket science. Quite funny
Stock bike does 13.5secs to 100 and this one does some 12.9 or so and then they are like wow, what a mean machine. Any chotu can build such a pipe.
Then we have our junta mechanics who play prank with mechanics, like in this case where someone was misguided that the ECU will self-adjust the AFR over usage. What are they thinking, I mean both the mechanic and the customer?
Now that Two brothers has launched their package, a price tag of $350 does not justify the performance gain it offers. trust me, it'll be a blessing if the gain is over one whole bhp on the dyno with just the exhaust.