Jump to content
ducatmh

Leaning on straight

Recommended Posts

I've been riding on track for about 4 years now and have done CSS Level 4 umpteen times by now so I'm not a noob by most standards. However, this season I have experienced something on my home track that I haven't in the past at any track. Coming out of the final corner onto the straight,  I have found my RSV4 not standing straight up for a good portion of the straight as I power on. I'm trying to figure out what might be causing that to happen. Is this a typical occurrence or am I unknowingly giving the bike input causing it get a slight lean? I ALMOST feel like I'm fighting it which really makes me think I must be doing something it doesn't like.

*The last corner is a tight slow left and the bike wants to stay leaned ever so slightly to the left.

*The only thing to change between the seasons is my speed and the RSV4 is new to me. (1199S & 1198S prior years)

Open to thoughts and happy to clarify if I am able. 

Share this post


Link to post
Share on other sites

Does the bike go straight during other straights?

Share this post


Link to post
Share on other sites

It does.  It’s the only track that it does this to me. I’ll be there again this coming Sunday so I will be putting more attention on what, if any, inputs I may be giving the bike. It has been about 4 months since... so perhaps my recollection of some of the details of the scenario have been lost as well. For example... after posting last night I laid there and was wondering if maybe the bike was actually leaning to the right vs left.  BTW... when I say “lean” I really mean that the bike is just off its vertical axis.

Share this post


Link to post
Share on other sites
On 10/8/2017 at 8:51 AM, ducatmh said:

It does.  It’s the only track that it does this to me. I’ll be there again this coming Sunday so I will be putting more attention on what, if any, inputs I may be giving the bike. It has been about 4 months since... so perhaps my recollection of some of the details of the scenario have been lost as well. For example... after posting last night I laid there and was wondering if maybe the bike was actually leaning to the right vs left.  BTW... when I say “lean” I really mean that the bike is just off its vertical axis.

Any chance you can get someone to video you?  Video can be a powerful tool in these type cases.

Share this post


Link to post
Share on other sites
5 hours ago, DLHamblin said:

Any chance you can get someone to video you?  Video can be a powerful tool in these type cases.

I'll see what i can do.   I can add that it doesn't do it on my  little bike. (R3) LOL

Share this post


Link to post
Share on other sites

Has the bike been crashed? How about the installation of the wheels? Some bikes have a specific procedure regarding which bolts should be torqued in which order (you do use a torque wrench, right?). Also, where is your weight centered when coming off the final corner? Do you stand the bike up swiftly or gently bring it up in sync with the power?

 

Just a few possibilities. That’s the best of what I have of value to help.

Share this post


Link to post
Share on other sites

Thanks for the ideas.  The bike is mechanically sound so I am fairly certain it's not the bike, it's the operator... me LOL.  I'm an avid "pick up" artist on track so the bike is typically picked up before I'm back in line with the saddle.  Just trying to determine if it's "normal" in certain scenarios.  i.e. this bike is tuned to 215 HP, it's a former professional race bike (MotoAmerica) so has gobs of mid-range power compared to the stock setup....  the front wheel gets light coming on the straight (Surprise!!). Is it possible/likely that with the front end lifting a little before upright, the gyroscopic effects cause this sensation I'm getting?  Does that even make sense? OR is it me hanging on for dear life and putting unwanted input into the controls? :)  I definitely have some research to do on track this weekend.  Hopefully the weather cooperates!

Share this post


Link to post
Share on other sites

2 weekends ago I was at a session with Dave Moss and he talked about buying former race bikes and the new owner failing to adjust the bike to themselves, believing the bike to be best “as-is”. Dave believes this to be in error and almost implied that the bike should be gone over with a fine tooth comb. He did say all the settings should be removed and baselined for the new owner.

Share this post


Link to post
Share on other sites

I flew into Houston to take delivery of the bike at the end of last year. The engine was torn down and rebuilt and the tune was also dumbed down a bit from what they ran in the races prior to the purchase. We (Bobby, one of his techs and I) spent the day at MSR (local track there) adjusting the bike to my needs so hopefully that's not an issue in this scenario.  It was only one day of tweaking a "new bike" on a "new-to-me" track so I can appreciate the limitations of the adjustments made. That said, overall the bike handles like a dream, is more compliant and confidence inspiring than my Ducati's ever were, the mid-range stomps the Ducati's as well (to be expected since that's one of the Panigale's many shortcomings) and best of all, my lap times dropped by a couple seconds within a few laps. 

Share this post


Link to post
Share on other sites

I guess that only leaves 2 options:

1- a previously unnoticed camber or line change

2- the nut connecting the seat and handlebars 😀 

Share this post


Link to post
Share on other sites
On ‎10‎/‎9‎/‎2017 at 8:42 PM, ducatmh said:

Thanks for the ideas.  The bike is mechanically sound so I am fairly certain it's not the bike, it's the operator... me LOL.  I'm an avid "pick up" artist on track so the bike is typically picked up before I'm back in line with the saddle.  Just trying to determine if it's "normal" in certain scenarios.  i.e. this bike is tuned to 215 HP, it's a former professional race bike (MotoAmerica) so has gobs of mid-range power compared to the stock setup....  the front wheel gets light coming on the straight (Surprise!!). Is it possible/likely that with the front end lifting a little before upright, the gyroscopic effects cause this sensation I'm getting?  Does that even make sense? OR is it me hanging on for dear life and putting unwanted input into the controls? :)  I definitely have some research to do on track this weekend.  Hopefully the weather cooperates!

Have a look at Twist of the Wrist II, Chapter 13  "Steer for the Rear". The fourth paragraph, in particular, may shed some light on the situation. :)

  • Like 1

Share this post


Link to post
Share on other sites

 

1 hour ago, Hotfoot said:

Have a look at Twist of the Wrist II, Chapter 13  "Steer for the Rear". The fourth paragraph, in particular, may shed some light on the situation. :)

Awesome! Thanks... so it looks like my frame of thinking was on the right track. Assuming no extraneous inputs from me, this is "normal". I'll still put a bit of attention on it this weekend to see if I come up with any other observations or questions. Forecast is 64 degrees, sunny with 10% chance of rain. Doubt I'll set any PB's with the cooler track surface.

Share this post


Link to post
Share on other sites
On 10/11/2017 at 10:28 AM, Hotfoot said:

Have a look at Twist of the Wrist II, Chapter 13  "Steer for the Rear". The fourth paragraph, in particular, may shed some light on the situation. :)

Not only am I also looking at that chapter I'm also looking at the subsequent chapters with a fresh perspective.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

×