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**dual disc 200** · 04-26-2012, 02:24 PM

Originally posted by The Mountain View Post

First, a 4-stroke exhaust pipe is cooler than 2-stroke because the power pulses are twice as far apart, giving the exhaust more time to cool between exhaust strokes.

Exactly what my point also was. When a hotter running bike can sustain the effects of heat on the headers, why not a 4 Stroke here?? So, quality issues comes to place right?

Originally posted by The Mountain View Post

Second, chrome doesn't discolor the way bare steel does. The chrome plating acts as an insulating layer, spreading the heat out along the entire pipe.

The bend pipe on an RX is not exactly chrome plated to last actually, the plating is of average quality & still it can sustain high temperature resistance effects. I also have a bend pipe that has no chrome at all but justa dull finish & it still hasn't showed up like anything that Nikhil does.

Originally posted by The Mountain View Post

Lastly, 600c *is* cool for an exhaust temp. The normal exhaust temp on a car is over 700C, and that's for a low-stress naturally-aspirated engine. A modern bike engine, which is generally tuned for much higher performance, will have a correspondingly higher exhaust temp of close to 1000C, especially right at the exhaust port.

That 600 deg Cel was a mere reading & a hotter engine on a two stroke exhaust port temp. goes up to 1000, so think what will the bend pipe be subjected to.

Originally posted by The Mountain View Post

That bend in the pipe right by the motor on the Duke is experiencing direct contact with the flame front of the exhaust gases, and is therefore going to be heated even more than a straighter pipe would be.

Same here too, Does RX have a straight pipe? Is it not subjected to the exhaust port directly?

**nasirkaka** · 04-26-2012, 02:28 PM

First, a 4-stroke exhaust pipe is cooler than 2-stroke because the power pulses are twice as far apart, giving the exhaust more time to cool between exhaust strokes.

Correct me if i am wrong. Practically, my 1984 RD 350s bent pipe as well as exhaust pipes are always much cooleer then my 2008 Machismo 350s. Could you explain why? I guess the exhaust temp is also dependent on the ignition temp, and 2 stokes ignite at a lower temp compated to a 4 stroke. I am not sure, i am asking for knowledge.

The Duke pipe isn't plated. Plus, your Bullet runs a LOT cooler than the Duke. The bullet uses a heavy, low-compression (and very old design) motor, and a chromed exhaust with a very gradual bend. The Duke uses a high-compression watercooled motor based on their off-road bikes.

As i said i am not sure if they would be using SS for the Dukes bent pipe. To me, it did not appear so from those pics. Just for the peace of my mind, could you share specs, where its mentioned that the exhaust is SS. or could any of the dukers test the bent pipe with a magnet, so if if it attracts or not.

As a corollary to my earlier post about modern bikes, welcome to the world of real motorcycles.

Thanks mate

**The Mountain** · 04-26-2012, 03:11 PM

Originally posted by dual disc 200 View Post

Exactly what my point also was. When a hotter running bike can sustain the effects of heat on the headers, why not a 4 Stroke here?? So, quality issues comes to place right?

The bend pipe on an RX is not exactly chrome plated to last actually, the plating is of average quality & still it can sustain high temperature resistance effects. I also have a bend pipe that has no chrome at all but justa dull finish & it still hasn't showed up like anything that Nikhil does.

That 600 deg Cel was a mere reading & a hotter engine on a two stroke exhaust port temp. goes up to 1000, so think what will the bend pipe be subjected to.

Same here too, Does RX have a straight pipe? Is it not subjected to the exhaust port directly?

Sorry, I should have been clearer: All other things being equal, the surface temp of the 4-stroke's exhaust pipe will be cooler, since it cools more between each exhaust stroke. The flame front temp of the exhaust gases is probably about equal for an equivalent displacement, and if anything, the heat cycle means more stress on the 4-stroke exhaust. However, the pipe on your RX is chromed (however poorly) and thus the chrome acts as an insulator, and is dealing with an engine with only 60% of the Duke's displacement. That's the other part of this equation: The Duke uses a modern motor similar to the smaller-displacement off-road engines in KTM's lineup. That is, it's designed for higher-performance operation. The little 2-stroke in your RX isn't designed for performance at all; it doesn't even use an expansion-chamber exhaust. Also, that 1000C temp is for a 4-stroke bike, not a 2-stroke. And yes, the RX has an exhaust bend, as most bikes do, but is it a sharp 180-degree bend right up at the cylinder, or a 90 or 80-degree?

**harshag26** · 04-26-2012, 03:14 PM

Crack

Guys,

I see some kind of crack on my fuel tank near the cap. Some 3 inch long which starts from the fuel cap.

I'm going to the service center this weekend to go and enquire about it.

Has anybody faced a similar issue?

Is this covered under warranty? Can i get it replaced?

**devil_rider** · 04-26-2012, 03:57 PM

Originally posted by hunkofgals View Post

but im gonna remove the mirrors
they hit some fellow pedestrian walking on the road near a signal jam
.
and about coolant
its about 1.8lts na so how much will our bike need ?
i live in andhra pradesh visakhapatnam
so il take the whole bottle if i can
.
and is it normal for the coolant to reduce drastically to that below minimum mark ?

The Engine Ice Coolant will have to be purchased coz it is not available at the SVC or many places around (correct me if i am wrong).. I found this place which sells it from the official website.. But the guy said that they deliver the stuff which you want (don't know about outside Mumbai)

And the max and min mark are hardly 50-100ml of coolant. The main coolant tank is on the inner side.. U just have to maintain the coolant level between max and min level.

I guess 1.8l would be more than sufficient.

**Venkat 333** · 04-26-2012, 04:56 PM

Originally posted by The Mountain View Post

Sorry, I should have been clearer: All other things being equal, the surface temp of the 4-stroke's exhaust pipe will be cooler, since it cools more between each exhaust stroke. The flame front temp of the exhaust gases is probably about equal for an equivalent displacement, and if anything, the heat cycle means more stress on the 4-stroke exhaust. However, the pipe on your RX is chromed (however poorly) and thus the chrome acts as an insulator, and is dealing with an engine with only 60% of the Duke's displacement. That's the other part of this equation: The Duke uses a modern motor similar to the smaller-displacement off-road engines in KTM's lineup. That is, it's designed for higher-performance operation. The little 2-stroke in your RX isn't designed for performance at all; it doesn't even use an expansion-chamber exhaust. Also, that 1000C temp is for a 4-stroke bike, not a 2-stroke. And yes, the RX has an exhaust bend, as most bikes do, but is it a sharp 180-degree bend right up at the cylinder, or a 90 or 80-degree?

isn't there any known technology for this kind of exhaust problem or does the KTM manufactured the poor quality exhaust.....

**hunkofgals** · 04-26-2012, 05:23 PM

Originally posted by devil_rider View Post

The Engine Ice Coolant will have to be purchased coz it is not available at the SVC or many places around (correct me if i am wrong).. I found this place which sells it from the official website.. But the guy said that they deliver the stuff which you want (don't know about outside Mumbai)

And the max and min mark are hardly 50-100ml of coolant. The main coolant tank is on the inner side.. U just have to maintain the coolant level between max and min level.

I guess 1.8l would be more than sufficient.

only 50-100 ml , means i can use that bottle till i sell the bike

.
can u provide details of that person who is selling it
il contact him

**devil_rider** · 04-26-2012, 05:43 PM

Originally posted by hunkofgals View Post

only 50-100 ml , means i can use that bottle till i sell the bike

.
can u provide details of that person who is selling it
il contact him

bro.. the entire coolant tank is about 1L (as said by SVC guy, i've never checked it)

Distributor:

The Motoshop
Address: 55, Maulana Azaad road, (Duncan Road),
Nagpada, Next to Cafe Sagar,
Mumbai - 400 008.

Phone : + 91 22 2301 92 92 / + 91 22 2301 92 93
Fax : +91 22 2305 11 77
Email : [email protected]

check if they deliver outside Mumbai

**Doga** · 04-26-2012, 05:52 PM

Originally posted by AnupamOnWheels View Post

As I am yet to complete my runin period I am not the appropriate one to answer these questions, but still wanted to answer a few. Please check them inline in Bold.

Thanks for the answers Anupam. But the major decision influencing questions are still unanswered. Owner's please help me out. Or is the what bike section more appropriate?

Reproducing the questions.
1. How is the riding stance(upright,as it is) over long stretches?I mean say 100-200 + Kms. I have been told and have read that a slighly forward inclined position would be better suited for long distances.Please donot factor wind blast in while answering this.

2. How bad is the windblast after 80kmph. Manageable? off putting? proper riding gear would lessen it? how bad is it when compared with the CBR? am sure many owners must have ridden a CBR.

3. Does the engine feel unrefined/strained/gruff after 100-110kmph?

4. Are there considerable vibrations at those speeds? I know it's a single but I want to make sure thee vibrations are not annoying at higher speeds.

5.Can the bike do 120 all day witout a hiccup or the engine feels too hot/strained/unrefined at those speed for long stretches? This is a different point than the 3rd.

**The Mountain** · 04-26-2012, 06:26 PM

Originally posted by Venkat 333 View Post

isn't there any known technology for this kind of exhaust problem or does the KTM manufactured the poor quality exhaust.....

KTM does not make poor-quality exhaust, and there really is no technology to totally prevent an exhaust header from discoloring. Chroming can reduce the effect significantly, but even chrome discolors over time.

For reference, here's a thread from a Buell forum way back in 2005 about exhaust discoloration. Note that all Buells came from the factory with full-stainless exhaust systems: Buell Motorcycle Forum: Pipe discoloration Is this normal

Here's the pic from that thread. Note that, if you look closely, the pipes on this bike are just as blotchy as what we're seeing with the KTM.

**NikhilB** · 04-26-2012, 06:41 PM

^^
Great info Mountain. Thanks a ton for your explanation & patience

**ynike99** · 04-26-2012, 07:14 PM

Common guys its common sense.the exhaust header pipe has obviously got some quality issues coz if not, everybodys exhaust should be like that coz all the dukes would produce same amt of heat at the header.its nothing close to the purplish tinge.ive seen it personally on many bikes in phoren.it looks completely different and vvv sexy.this here what many owners are experiencing is lack of qc by ktm/bajaj

**sivigshankar** · 04-26-2012, 08:29 PM

Originally posted by shv18 View Post

Hi, Engine ice coolant Hope this was usefulCheers,

Thanks for the information Shv.

Originally posted by devil_rider View Post

I've found ....I called up the authorised seller of Engine Ice Coolant in Mumbai - 1.8L for 1300 bucks.. I think it's a good deal
What do you all think!!

Is this pre-mixed ?

Originally posted by NikhilB View Post

,....@sivigshankar
Any reply from the KTM chaps?

I emailed PBK Customer care and they asked me to contact the PBK ASC. Will take the bike over the weekend and figure out what they have to say about this. Crossed the ASC a couple of times today and yesterday, was lost in thought so missed taking the bike in

Originally posted by devil_rider View Post

BTW.. Is anyone willing to change the coolant to - Engine Ice Hi-Performance Coolant??If yes then we can go in group and maybe we can get some discount too

Any one up for this??

I am sure there'll be lot of takers given the heat will become unbearable during Chennai Peak Summer which starts in about a week or so. I am IN, however, am based in Chennai, not sure how we can work this out.

Originally posted by The Mountain View Post

On a topic unrelated to the exhaust issue,......The funny, and education-related part of this was that one of the dealership guys tried to tell me that there was a 200 and a 250 KTM available, the Duke and the Ninja

. He thought KTM stood for Kawasaki Technology Motorcycles, or something like that.

Thanks Mountain for your time and efforts on this. Kawasaki Tech. Motorcycles.. that's interesting .. wonder who else thinks like this.

**hunkofgals** · 04-26-2012, 09:52 PM

Originally posted by devil_rider View Post

bro.. the entire coolant tank is about 1L (as said by SVC guy, i've never checked it)

Distributor:

The Motoshop
Address: 55, Maulana Azaad road, (Duncan Road),
Nagpada, Next to Cafe Sagar,
Mumbai - 400 008.

Phone : + 91 22 2301 92 92 / + 91 22 2301 92 93
Fax : +91 22 2305 11 77
Email : [email protected]

check if they deliver outside Mumbai

means i need to open the whole engine thing for changing it ?
.
and today i went and topped the coolant to max level
and started riding
still the heat is same
its getting heated very soon so again took it to mechanic he checked engine oil level it was fine and reduced idle rpm
and bike is stopping and i need to rev hard to let go off the bike from 1st gear

**hunkofgals** · 04-26-2012, 09:53 PM

Originally posted by devil_rider View Post

bro.. the entire coolant tank is about 1L (as said by SVC guy, i've never checked it)

Distributor:

The Motoshop
Address: 55, Maulana Azaad road, (Duncan Road),
Nagpada, Next to Cafe Sagar,
Mumbai - 400 008.

Phone : + 91 22 2301 92 92 / + 91 22 2301 92 93
Fax : +91 22 2305 11 77
Email : [email protected]

check if they deliver outside Mumbai

means i need to open the whole engine thing for changing the coolant
i called those no's but no response from that mumbai guy man ?
.
and today i went and topped the coolant to max level
and started riding
still the heat is same
its getting heated very soon so again took it to mechanic he checked engine oil level it was fine and reduced idle rpm
and bike is stopping and i need to rev hard to let go off the bike from 1st gear

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