matoc
9th December 2008, 01:18
Hello KiwiBiker!
I've been a member for a few months now, but have never really had anything of worth to contribute so this will be my first post!
I own a CBR250RR and I'm loving it. I started on a little RGV150 but got bored rather quickly and asked the bank very nicely if they'd buy me a new bike. Anyway, I've been on the CBR for a few months now and first tried to wheelie it a couple weeks ago, and just to clarify, this is not a "teach me to wheelie" thread. I'm able to easily get the RGV up and have had some practice off road on a DRZ250 and DRZ400, both of which I can mono. This is more to do with the CBR's clutch and whether you think it needs to be looked at.
I'll try my best to describe the situation.
1st gear, I take it to about 20km/h, I slip the clutch and roll on the throttle. This is enough to get any of those other bikes on one wheel. The problem is that the clutch is not engaging instantly once I release it, and therefore providing the kick required to wheelie. Instead it slowly engages, dropping the revs slightly and once fully engaged they build as usual. The bike then accelerates just as quick as it usually would, keeping the front end down. It feels like there is an auto-clutch increasing the time it takes to engage when in the high rev range.
I have spent quite a bit of time experimenting with this, such as reducing the amount I pull the clutch in; reducing revs (as low as 10k); increasing revs (up to near redline); trying in 2nd gear; putting one foot on the pillion peg; and even going spider-man and sitting on the pillion seat. I assume it's not a problem with the engine because if I leave the clutch out of it and try snapping the throttle off and then on in 1st the front gets very light and just about bounces.
A friend of mine, Hamish Murphy, has also had a few attempts. He used to own a Hyosung GT250R that he could wheelie, which is pretty similar to the weight distribution of the CBR. The fact that it's a twin could make a difference, but not in the way the clutch engages so I highly doubt it's that. I'm sure he'll be around soon to share his thoughts.
The bike has done just over 50,000 km so my guess is that it is simply a worn clutch, something I will have checked when I have the money to take her in for a service. However I thought I'd post this to see what the rest of you think, so if anyone here has had similar problems please let me know!
And before any of you get shitty... I do all my wheelie practice on a very quiet street that lies between two fields, so I'm not pissing anyone off with the 19,000 rpm scream of my baby blade. I wear all the right gear, avoid any cars that do happen to pass me, and yes I know it is a little hard on a 250cc!
Thanks in advance!
I've been a member for a few months now, but have never really had anything of worth to contribute so this will be my first post!
I own a CBR250RR and I'm loving it. I started on a little RGV150 but got bored rather quickly and asked the bank very nicely if they'd buy me a new bike. Anyway, I've been on the CBR for a few months now and first tried to wheelie it a couple weeks ago, and just to clarify, this is not a "teach me to wheelie" thread. I'm able to easily get the RGV up and have had some practice off road on a DRZ250 and DRZ400, both of which I can mono. This is more to do with the CBR's clutch and whether you think it needs to be looked at.
I'll try my best to describe the situation.
1st gear, I take it to about 20km/h, I slip the clutch and roll on the throttle. This is enough to get any of those other bikes on one wheel. The problem is that the clutch is not engaging instantly once I release it, and therefore providing the kick required to wheelie. Instead it slowly engages, dropping the revs slightly and once fully engaged they build as usual. The bike then accelerates just as quick as it usually would, keeping the front end down. It feels like there is an auto-clutch increasing the time it takes to engage when in the high rev range.
I have spent quite a bit of time experimenting with this, such as reducing the amount I pull the clutch in; reducing revs (as low as 10k); increasing revs (up to near redline); trying in 2nd gear; putting one foot on the pillion peg; and even going spider-man and sitting on the pillion seat. I assume it's not a problem with the engine because if I leave the clutch out of it and try snapping the throttle off and then on in 1st the front gets very light and just about bounces.
A friend of mine, Hamish Murphy, has also had a few attempts. He used to own a Hyosung GT250R that he could wheelie, which is pretty similar to the weight distribution of the CBR. The fact that it's a twin could make a difference, but not in the way the clutch engages so I highly doubt it's that. I'm sure he'll be around soon to share his thoughts.
The bike has done just over 50,000 km so my guess is that it is simply a worn clutch, something I will have checked when I have the money to take her in for a service. However I thought I'd post this to see what the rest of you think, so if anyone here has had similar problems please let me know!
And before any of you get shitty... I do all my wheelie practice on a very quiet street that lies between two fields, so I'm not pissing anyone off with the 19,000 rpm scream of my baby blade. I wear all the right gear, avoid any cars that do happen to pass me, and yes I know it is a little hard on a 250cc!
Thanks in advance!