[B]CBR250R and Horsepower[/B]
Hi folks new to the forums but not necessarily to motorcycles.
I have been scouring the internet in search of a better CBR250R (in a manner of speaking). I have come across discussions and forums on getting the CBR's HP benchmark into the 30-40 hp "Ninja" category as well as Top Speed. With all of the technology at our disposal and 2 years into the CBR's tenure it baffles me why The CBR250R hasn't surpassed this benchmark.
Several obstacles I have noticed.
1.) The CBR's rev limiter delemma 10,500 ish
2.) Compression ratios (stock 10:7:1)
3.) Gearing
4.) Weight
5.) Fuel Delivery
First: Rev Limiter; I haven't seen too much the way of getting around that one. I am surprised because isn't the rev limiter built into the fuel mapping of the ECU ? And if you can manually program your mapping there should be a way to override that. I understand "Dynojet's" ECU controller and software allows you to do this. Or am I wrong ?
2.) I've seen high compression piston kits (12:5:1) + different cams that should theoretically be good for an additional 10 hp at least. I'm wondering if rebuilding the bottom end of the motor (i.e. crank etc) would yield better results as well.
3.) I am aware of the rear sprocket trick that many have used which yields an extra 3-5mph in the top end (or so I'm told) .. this would make more sense after working the motor to turn higher RPM's as I am not aware of Honda making a different set of gears for this bike.
4.) Weight; It would be nice to see the CBR with an Aluminum frame I understand that would put a dent in our pocket book but hey I would mind paying an extra $2000 bucks if they could make that a reality.
Changing Exhaust and a few other things i understand can significantly help as well as helping the motor breath better.
5.) I was wondering are there bigger throttle bodies available if so getting more fuel to the cylinder is always a good way to build power.
Lastly, The Single Cylinder Moto3 4 stroke 1/4 bikes are a testament to the fact that high speeds can be achieved with proper engineering etc.
I understand that Yamaha and KTM will be getting their feet wet next year in the 1/4 litre class the YZF-R4 is Yamaha's offering and KTM is apparently bringing a rendition of their moto3 bike to the consumer mix. Wether this forces Honda's hand to up their game will be interesting to see.
Thanks guys.
Hi folks new to the forums but not necessarily to motorcycles.
I have been scouring the internet in search of a better CBR250R (in a manner of speaking). I have come across discussions and forums on getting the CBR's HP benchmark into the 30-40 hp "Ninja" category as well as Top Speed. With all of the technology at our disposal and 2 years into the CBR's tenure it baffles me why The CBR250R hasn't surpassed this benchmark.
Several obstacles I have noticed.
1.) The CBR's rev limiter delemma 10,500 ish
2.) Compression ratios (stock 10:7:1)
3.) Gearing
4.) Weight
5.) Fuel Delivery
First: Rev Limiter; I haven't seen too much the way of getting around that one. I am surprised because isn't the rev limiter built into the fuel mapping of the ECU ? And if you can manually program your mapping there should be a way to override that. I understand "Dynojet's" ECU controller and software allows you to do this. Or am I wrong ?
2.) I've seen high compression piston kits (12:5:1) + different cams that should theoretically be good for an additional 10 hp at least. I'm wondering if rebuilding the bottom end of the motor (i.e. crank etc) would yield better results as well.
3.) I am aware of the rear sprocket trick that many have used which yields an extra 3-5mph in the top end (or so I'm told) .. this would make more sense after working the motor to turn higher RPM's as I am not aware of Honda making a different set of gears for this bike.
4.) Weight; It would be nice to see the CBR with an Aluminum frame I understand that would put a dent in our pocket book but hey I would mind paying an extra $2000 bucks if they could make that a reality.
Changing Exhaust and a few other things i understand can significantly help as well as helping the motor breath better.
5.) I was wondering are there bigger throttle bodies available if so getting more fuel to the cylinder is always a good way to build power.
Lastly, The Single Cylinder Moto3 4 stroke 1/4 bikes are a testament to the fact that high speeds can be achieved with proper engineering etc.
I understand that Yamaha and KTM will be getting their feet wet next year in the 1/4 litre class the YZF-R4 is Yamaha's offering and KTM is apparently bringing a rendition of their moto3 bike to the consumer mix. Wether this forces Honda's hand to up their game will be interesting to see.
Thanks guys.