Thread: [Ownership Thread]: Yamaha YZF-R15
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Old 12-31-2008, 07:06 AM   #1977 (permalink)
Sarvajit
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@HydBiker&Harsha: I think that riding style is good. I'm following it most of the time too. Changing gears at around 4-5K RPM in traffic&5-6K RPM on empty roads. Bike seems to pick up speed without sputtering even from 40 or so in 6th.

@Suhail: You're right-overall it is a niche product, though minor niggles are in all vehicles. Like Archi&HydBiker say, it is mostly due to the after-sales service&attitude of the SS guys.

@Archi: Thats what I was trying to tell you-tuning idling RPM does not affect fuel flow directly. The SS guys think that if they tune it to idle low it'll drink less petrol. Thats not true. You can't go below a particular setting or the engine will die down when at signals. In the effort to keep it idling people will have the throttle open a wee bit&that'll again start drinking fuel! I don't believe mileage can be set for an FI vehicle. The only thing for optimizing mileage is to eliminate dust from the air filter, clean the pipes etc.but there is no power or economy 'setting' as such like the carbs have.
What you have done is increase the idling, which is helping your engine to get warm quicker, in turn helping in achieving a higher top whack. However, I believe it is going to eat away your engine life as well as FE(no.2 not a big issue, but no.1 is). Why don't you try this: Set the idle rpm to 12-1300, go for a 5km.ride at normal speed, then try to check the top whack? I believe you can still achieve the same top speed provided the engine is adequately warmed up.
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