![]() | #2986 |
BHPian ![]() Join Date: Jun 2010 Location: Cochin
Posts: 304
Thanked: 125 Times
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![]() | #2987 |
BHPian ![]() | ![]() I used to experience the engine cut off issue when the bike was new. It cleared itself up until recently. Since its been exactly a year since I got the bike, I'm wondering if the lower temperatures in Chennai at this time are in anyway connected with the engine cutting off? Anyway, I noticed the issue only occurs when the engine is cold AND the engine is blipped or a rapid throttle closure\rpm drop to idle takes place. |
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![]() | #2988 | |
BHPian ![]() Join Date: Oct 2014 Location: Madras
Posts: 132
Thanked: 120 Times
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![]() | #2989 |
BHPian ![]() | ![]() Haha, I agree. I'm sweating as I type this out :P |
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![]() | #2990 |
Senior - BHPian ![]() Join Date: Feb 2010 Location: Pune
Posts: 4,387
Thanked: 5,092 Times
| ![]() I have a question for owners of the newer 390s (later months this year). Does the radiator fan still come on when you stop after a hard 15-20 minute city traffic ride? And does it stay on like in the older bikes (no matter how long you wait for it to go off at idle) or does it quickly go off once the temperature comes down (like in the 200s)? |
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![]() | #2991 |
BHPian Join Date: Oct 2014 Location: Bangalore
Posts: 273
Thanked: 303 Times
| ![]() For academic purpose only: ================= Based on the primary/secondary (final) gear ratio and individual gear ratios for each gear, these are the figures for D390 (with stock settings) Gear_Position - Overall_Gear_Ratio - Speed-per-1000RPM --------------------------------------------------------------- 1st - 21.39:1 - 5.4kmph/1000RPM 2nd - 14.90:1 - 7.7kmph/1000RPM 3rd - 11.37:1 - 10.1kmph/1000RPM 4th - 09.13:1 - 12.6kmph/1000RPM 5th - 07.69:1 - 14.9kmph/1000RPM 6th - 06.73:1 - 17.1kmph/1000RPM Please let me know if there is any error in above data. I got the above data by calculating the overall gear ratio for each gear and the tyre size. I know the above data may be bit boring unless you compare them with the Ninja 300s ![]() As a bonus and with a hope this does not start an unwanted debate, here is the data for N300. Gear_Position Overall_Gear_Ratio Speed-per-1000RPM --------------------------------------------------------------- 1st - 25.12:1 - 4.7kmph/1000RPM 2nd - 6.59:1 - 7.1kmph/1000RPM 3rd - 13.07:1 - 9.0kmph/1000RPM 4th - 10.75:1 - 11.kmph/1000RPM 5th - 09.27:1 - 12.7kmph/1000RPM 6th - 07.97:1 - 14.8kmph/1000RPM Any inference ???? The above data only confirms that D390 has a longer gearing when compared to N300. |
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![]() | #2992 | |
BHPian ![]() Join Date: Jun 2010 Location: Cochin
Posts: 304
Thanked: 125 Times
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![]() | #2993 | |
Senior - BHPian ![]() Join Date: Feb 2010 Location: Pune
Posts: 4,387
Thanked: 5,092 Times
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What you are doing is counter-intuitive for me. When the fan is on, I never shut off my bike. Well, to be fair, I only ever had one bike with a fan. And its not with me anymore. My current bike is from a much simpler time. | |
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![]() | #2994 |
BHPian ![]() | ![]() Well this is not possible on any 390 doc! After a normal traffic run, the fan is on by default. I have waited a looonng time for the fan to stop before I turn the engine off. But it just does not and I will have to shut off the engine. The same is noticed in another friend's "newer" 390. I believe this fan is sufficient to cool the 200's engine. But it is only just sufficient to ensure the 390's engine does not overheat. I am strictly talking about the scenario where the bike is standstill. EDIT: I also heard that the same fan in the 390 is made to run at a higher RPM compared to that on the 200. Not sure how true this is. Last edited by Added_flavor : 21st October 2014 at 16:16. |
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![]() | #2995 |
Senior - BHPian ![]() | ![]() To add to this, I have read about a person in one of the international forums who had swapped the existing fan of the 390 to a bigger fan and noticed superb cooling characteristics when compared to the stock one! Even in heavy traffic scenarios. |
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![]() | #2996 | |
BHPian ![]() Join Date: Jun 2010 Location: Cochin
Posts: 304
Thanked: 125 Times
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![]() | #2997 | |
Senior - BHPian ![]() Join Date: Feb 2010 Location: Pune
Posts: 4,387
Thanked: 5,092 Times
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mithunvijayan, once your bike is runin, and your first service and oil change is done, could you please check if the fan shuts off after some time. Like added flavor, once jst to check, I actually sat near the idling bike for 15 minutes (burning my own fuel), and the fan still did not go off. After which I simply shut off the bike. I cannot believe that almost 2 years later this is still happening ...... ![]() | |
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![]() | #2998 | |
Senior - BHPian ![]() | ![]() Quote:
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![]() | #2999 | |
BHPian ![]() Join Date: Jun 2010 Location: Cochin
Posts: 304
Thanked: 125 Times
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![]() | #3000 | ||||
BHPian Join Date: Jan 2014 Location: Kolkata
Posts: 446
Thanked: 421 Times
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![]() The stoppie was quite scary and based on the explanations since provided , I guess I wrongly assumed it as an ABS malfunction/shortcoming . Quote:
![]() I was merely stressing on the quality of road and wanted to reassure myself , I due to a lack of complete understanding of the physics behind stoppie that I assumed traction might play a role . Quote:
![]() I have few queries btw , The bike after starting (as in cool engine ) is extremely jerky , no I don't mean mild snatching that are present in even hot engine below 4k rpm but severe snatches and they are present even after 4/5 bars on temp gauge in first 3 gears ( 1st gear is insufferable , 2nd too and 3rd is just about tolerable and coming from a CI bullet , a regular bike guy will probably brand it defective the way it is right now ) . Fuel is premium indian oil(91 RON) from a company owned and run pump , has a good reputation so chances of adulterated fuel is very low . Bike is just 140km on Odo , I assume it will get smoother with passage of miles and is the cold engine behavior normal ? I should mention I keep the bike below 5k rpm , tried 2nd today at 6/7k rpm and it was still jerky for the rpm . Twice now the gear indicator has malfunctioned during shifting to neutral in standstill , it shows 0 but stall on letting off clutch . Should I be concerned or such occurrence are typical ? It doesn't really bother me but at the same time I don't wish a complication later on . Tonight during a short acceleration burst ( almost WOT ) , the front wobbled slightly (nothing scary but noticeable , road is good ) . Is that normal , excuse the question if it comes across as newbie/vague but I am not used to this type of acceleration hence really have no idea at all what is normal and what is not . Last edited by basuroy : 21st October 2014 at 23:24. | ||||
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