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**MoonLight** · 07-09-2013, 07:10 PM

Re: Hero Ignitor

Originally posted by Divya Sharan View Post

2. Upshift in the higher RPM band, somewhere in the 70% area where the bike generates max torque. Say, the bike makes max torque @10k RPM, upshift @7k RPM.

A wild thought...lets assume torque curve is peaky in nature. ie it tapers on RPMs below and above peak torque RPM. So in principle, vehicle should give good mileage at RPMs that are less than peak torque RPM and also at RPMs well above it

. So drive at 50.....or else above 70 to get good fuel efficiency, just an example

!!!

We need to know exact torque curve for particular bike to know optimum driving RPMs.
[MENTION=56166]ravisawalia[/MENTION]: what mileage are you getting now ?

**Divya Sharan** · 07-09-2013, 07:18 PM

Re: Hero Ignitor

Originally posted by MoonLight View Post

A wild thought...lets assume torque curve is peaky in nature. ie it tapers on RPMs below and above peak torque RPM. So in principle, vehicle should give good mileage at RPMs that are less than peak torque RPM and also at RPMs well above it

. So drive at 50.....or else above 70 to get good fuel efficiency, just an example

!!!

We need to know exact torque curve for particular bike to know optimum driving RPMs.
@ravisawalia: what mileage are you getting now ?

Nice theory, but not practical at all. Almost all bikes (except litre class n above) have a linear torque curve till the peak post which they taper down. Hence, my suggestion. What you are implying is an inverted "V" or "U" which is not the case with desi bikes generally.

**MoonLight** · 07-09-2013, 07:29 PM

Re: Hero Ignitor

Originally posted by Divya Sharan View Post

Nice theory, but not practical at all. Almost all bikes (except litre class n above) have a linear torque curve till the peak post which they taper down. Hence, my suggestion. What you are implying is an inverted "V" or "U" which is not the case with desi bikes generally.

Yes thats what i said in start, its wild thought

. please correct me if I am wrong but...lets assume bike has linear torque curve ie it increases linearly till peak torque RPM and then tapers off after it. This is same as what I said, inverted V or U if we take your words. so we should get good mileage if we are at RPMs below or above this peak RPM. now this is all science taught me. In real world, scenario can be quite complex.

**Divya Sharan** · 07-09-2013, 07:34 PM

Re: Hero Ignitor

Originally posted by MoonLight View Post

Yes thats what i said in sart, its wild thought

. please correct me if I am worng but...lets assume bike has linear torque curve ie it increases linearly till peak torque RPM and then tapers off after it. This is same as what I said, inverted V or U if we take your words. so we should get good mileage if we are at RPMs below or above this peak RPM. now this is all science taught me. In real world, scenario can be quite complex.

I guess its either me or you missing missing some point. The curve is linear and NOT a spike. This would mean that you'd get a good pull till the peak, post which it would taper till redline. Usually max power figures fall in this tapered zone. But as you increase the pulling power (closer to max torque figure), the fuel consumption would actually increase due to the power transmitted to the rear wheel. The trick to obtaining max mileage is finding that sweet spot within the RPM band so that the engine has a decent power at its disposal as well as its not so less than it starts knocking.
In my case, upshifting at 70% serves me right.

**MoonLight** · 07-09-2013, 07:45 PM

Re: Hero Ignitor

Originally posted by Divya Sharan View Post

I guess its either me or you missing missing some point. The curve is linear and NOT a spike. This would mean that you'd get a good pull till the peak, post which it would taper till redline. Usually max power figures fall in this tapered zone. But as you increase the pulling power (closer to max torque figure), the fuel consumption would actually increase due to the power transmitted to the rear wheel. The trick to obtaining max mileage is finding that sweet spot within the RPM band so that the engine has a decent power at its disposal as well as its not so less than it starts knocking.
In my case, upshifting at 70% serves me right.

I lay my case here. My intention was never to oppose suggestion given by you, yes its true that optimum RPM range for fuel efficiency lies before peak torque RPM. what I wanted to know is....we know that we get good fuel efficieny at RPMs below peak torque RPM because motor is producing less torque. Same should be case with RPMs above peak torque RPM( incase torque tapers off after peak torque RPM)....because at higher RPMs(above peak torque RPM ) motor is producing less torque.

p.s.: fingers are aching writing Peak torque RPM again and again

.

**Divya Sharan** · 07-09-2013, 09:50 PM

Re: Hero Ignitor

Originally posted by MoonLight View Post

because at higher RPMs(above peak torque RPM ) motor is producing less torque.

True, but then you get into the band of max power, right? Hence, lesser than optimal mileage!

**MoonLight** · 07-12-2013, 03:15 PM

Re: Hero Ignitor

Originally posted by Divya Sharan View Post

True, but then you get into the band of max power, right? Hence, lesser than optimal mileage!

Right sir !!!!!!

**jammbuster** · 07-12-2013, 04:08 PM

Re: Hero Ignitor

A poor Fellow..

Hero Ignitor - Repairing Problem

**Divya Sharan** · 07-12-2013, 05:38 PM

Re: Hero Ignitor

Originally posted by MoonLight View Post

Right sir !!!!!!

Sarcasm, eh?

Originally posted by jammbuster View Post

A poor Fellow..

Hero Ignitor - Repairing Problem

Replies in bold.

1) Kick is hanging while kikking.
-Compression issue

2) Meter Light is flactuating
- Electricals need a check. Probably due to rain.

3) Allow wheels color is missing.
- Normal. Happens near coastal areas due to moisture + salt in the air.

4) Body color is missing.
- Same as above. Not exactly as said by the OP, but the paint fades faster!

5) Chain set is noising.
- Maintenance issues. Lubing needed.

6) Tyre is bubling.
- Maybe improper air pressures or a manufacturing defect.

7) Gear Shifting Problem.
- Engine oil used is bad. A 20w40 grade would help, rather than that 10w30 crap which comes as stock.

**MoonLight** · 07-12-2013, 06:06 PM

Re: Hero Ignitor

Originally posted by Divya Sharan View Post

Sarcasm, eh?

7) Gear Shifting Problem.
- Engine oil used is bad. A 20w40 grade would help, rather than that 10w30 crap which comes as stock.

Sarcasm...never ! I owe what ever I knows about automotive knowledge to this great site and its members like you.

Gear shifting problem is usually normal in new bikes which settles with time. Shifting to 20w40 will void warranty.

**Divya Sharan** · 07-12-2013, 06:26 PM

Re: Hero Ignitor

Originally posted by MoonLight View Post

Sarcasm...never ! I owe what ever I knows about automotive knowledge to this great site and its members like you.

Gear shifting problem is usually normal in new bikes which settles with time. Shifting to 20w40 will void warranty.

Well, you can always replace oil from outside @ any mech. SVC won't allow oil grade change for sure. Moreover, that guy completed his 3rd service, so hopefully the bike would have done 2k kms at least. Enough time for gearshifts to get smooth(er).

**Mohan Lalapeta** · 08-16-2013, 05:49 PM

Re: Hero Ignitor

Originally posted by abhi_krao View Post

Hello Xbhp friends, I am new to this forum and a proud owner of a white hero Ignitor (Disc). Had to wait more than 2 months for this one. Enjoying all the attention I get on the road. However, i feel the gear ratios are too close. I was doing just 40kmph in 5th gear at 4000 rpm. Its good for city, but for speeds above 50, the bike starts feeling underpowered.

Hi Dude,

I am planning to buy hero Ignitor White.
Can you tell me the Pros and Cons of the bike?(FE,Comfort,Power)
and maintenance of white color bike.

**Divya Sharan** · 08-16-2013, 05:56 PM

Re: Hero Ignitor

Originally posted by Mohan Lalapeta View Post

Hi Dude,

I am planning to buy hero Ignitor White.
Can you tell me the Pros and Cons of the bike?(FE,Comfort,Power)
and maintenance of white color bike.

Pardon me for pitching in, but I can give you pointers:

Pros:
1. Close/short gear ratios, effortless zip zap zoom in city.
2. Lightweight.
3. Looks good (console looks lovely BTW).
4. Decent enough mileage.

Cons:
1. Gear ratios being so short, the bike struggles on the highway. Speeds in excess of 90 for a long time would make the engine sound harsh. Sweet spot is 55-75 for cruising.

**Mohan Lalapeta** · 08-16-2013, 06:01 PM

Re: Hero Ignitor

Originally posted by Divya Sharan View Post

Pardon me for pitching in, but I can give you pointers:

Pros:
1. Close/short gear ratios, effortless zip zap zoom in city.
2. Lightweight.
3. Looks good (console looks lovely BTW).
4. Decent enough mileage.

Cons:
1. Gear ratios being so short, the bike struggles on the highway. Speeds in excess of 90 for a long time would make the engine sound harsh. Sweet spot is 55-75 for cruising.

Thanks For Info.

I will be riding 90% inside Chennai city only so no need to worry about Highways.

Yes looks are too good.

In between what mileage can i expect ( in Chennai city Roads) and is that difficult to maintain White one.? (Don't no about maintenance, it will be my first bike)

**Divya Sharan** · 08-16-2013, 06:04 PM

Re: Hero Ignitor

Originally posted by Mohan Lalapeta View Post

Thanks For Info.

I will be riding 90% inside Chennai city only so no need to worry about Highways.

Yes looks are too good.

In between what mileage can i expect ( in Chennai city Roads) and is that difficult to maintain White one.? (Don't no about maintenance, it will be my first bike)

Real world mileage would depend upon your riding style. Expect ~55 kmpl with sane riding. Else ~50 kmpl is realistic.
I own a white ZMR. Maintenance is not that tough, but requires some effort. Give it a wash once a week and detail (wax/polish) it once a month.
Keep a check on chain sprockets though. Lube them every 500 km, they should not run dry!

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