The R15 Garage Thread

[suhail_kapoor]

Joel this is gr8 mate, though i have not posted much but have been a great follower of your work, more so since i bought the R15 8 months back.

Just wanting to hear the performance figures now.

[Joel]

The exhaust is not loud enough to tear ear drums, nor is it too soft. Its very grunty and my key criteria is performance. Looks and sound should only be a part of it, not the priority. Frankly a sexy looking exhaust does not mean it will perform the best, coz for aesthetic reasons, you'll have to make dimensional sacrifices which will effectively tamper the performance goal.

[karthik_R]

The exhaust sounds like its emanating from a 200+cc mill...Its not that harsh nor that soft..its music

[souvikb83]

when can we see those brilliant pics from a brilliant piece of engineering???just cant hold my breath....Joel....HATS OFF TO YOU MAN....but one request please do not let your hard work go for a waste...for FREE

[satyenpoojary]

when can we see those brilliant pics from a brilliant piece of engineering???just cant hold my breath....Joel....HATS OFF TO YOU MAN....but one request please do not let your hard work go for a waste...for FREE

The pics are on the previous page... atleast read it!

Not sure of what people 'see' in these pics ... anybody care to enlighten me about it please

[souvikb83]

The pics are on the previous page... atleast read it!

Not sure of what people 'see' in these pics ... anybody care to enlighten me about it please

i think nobody will "care" to enlighten on this...but its actually the tastes and prefferences of different human beings....and btw read all the commentry of Joel's brilliant innovation.

[tibby]

Great Work!

Great work Joel bro! I'm sure it requires a hell lot of skill to extract more juice from the bike!
Hope your bike is ready soon! Best of Luck bro!

@All: How harmful is the sound a bike (kind of a click from the engine/gearbox) makes while turning the ignition off?
My previous bike had it (courtesy me, of course ), and I 'm almost sure it was because I ended up stalling it a lot many times (learnt biking on it!). The people at the SVC used to say the sound is normal!
Do any of your R15s make the sound, & how harmful/bad is it for the bike?
Also, can the sound be eliminated somehow?

[Sarvajit]

@All: How harmful is the sound a bike (kind of a click from the engine/gearbox) makes while turning the ignition off?
My previous bike had it (courtesy me, of course ), and I 'm almost sure it was because I ended up stalling it a lot many times (learnt biking on it!). The people at the SVC used to say the sound is normal!
Do any of your R15s make the sound, & how harmful/bad is it for the bike?
Also, can the sound be eliminated somehow?

Nothing harmful about it. Most of the bikes with electric starters make that sound. Sometimes it doesn't come though-the bike shuts off silently. I don't think its worth doing anything to reduce that sound!

[insanebiker]

Nothing harmful about it. Most of the bikes with electric starters make that sound. Sometimes it doesn't come though-the bike shuts off silently. I don't think its worth doing anything to reduce that sound!

True. All pulsars make this tak sound too; after they are turned off.

[Joel]

How harmful is the sound a bike (kind of a click from the engine/gearbox) makes while turning the ignition off?

The sound is no where from the engine or gearbox. There are baffles inside the exhaust canister which are used to silence the sound waves by creating restrictions in the exhaust gas path. These baffles experience high temperatures(coz of the exhaust gas heat) and as soon as you switch off your engine, they begin to contract. Thats when the tik-tik sound starts. Its very normal and is no where present on a freeflow exhaust coz there are no baffles. Its a straight flow path.
An RTRs pipe makes very little noise coz its not restricted much, but the R15s pipe is quite restrictive.

[insanebiker]

^ I think he is talking about the sound he gets while turning off the ignition,(At that precise moment) and not that which comes while cooling and contracting.

Sarvajith was also querying about the same sound just a few days back!

[suhail_kapoor]

Joel, If not too much of a hassle .. can our ears be pleased to a sound recording on the exaust note ... should make for some good music.

An decent mobile phone should be able to record the same.

[Joel]

^ I think he is talking about the sound he gets while turning off the ignition

If thats the case, then its the self starter clutch which makes a low idle clatter. You stall the engine more than normal coz of low engine idle. Bump the engine idle rpm and its solved. Its nothing harmful anyways.
In some engines, the sound comes from the de-comp notch on the camshaft. Esp on the RTR/Fiero which makes a tik tik noise below 1200rpm of idle. Its stalls by around 1000-900rpm after the noise comes.
The R15 also has a de-comp assembly, and yes it can give a little clatter at really low revs.
Again the solution is increasing the idle rpm.

[tibby]

^ I think he is talking about the sound he gets while turning off the ignition,(At that precise moment) and not that which comes while cooling and contracting.

Sarvajith was also querying about the same sound just a few days back!

@insanebiker: Rightly said! BTW, I think the sound that Sarvajith was querying was different!

@Joel: I'm talking about the sound from the bike as soon as the ignition is turned off. Its a kind of withdrawl sound which emnates from the engine/gearbox as soon as the bike is turned off (in the next split-second)! The sound prolly lasts for say 0.5 seconds!

[Joel]

Slightly OT
I just got got an SMS from Yamaha, welcoming me to the Yamaha family. And they have given me a "Unique No". Any idea what that is? Have all of you received such an SMS?

Sir, pls spare this thread to technical discussions only. Pls discuss this in the ownership thread.