hey guys i brought my bike off a mechanic and he said race changing (clutching and not backing the revs off) isnt good for the gear box. i beleive that it doesnt do any harm? but my tranmission skips 3rd gear when i race change but when i back off to change it shifts fine. anyone know if it does trash your gearbox?
is race changing bad for the gearbox?
Started by
Danebowers01
, Jan 24 2012 04:22 AM
3 replies to this topic
Posted 24 January 2012 - 08:21 AM
When you say skips 3rd... does it go from 2nd to 4th or does it just not shift up, or possibbly just make a grinding noise? There could be a mechanical failure with your trans or it could be the way you shift.
To answer your question... shifting under heavy load (as you put it, race changing) does increase wear and tear on the drive train. If done properly, it's no worse than the alternative. With that said, these transmissions are designed to be used in severe competiton. They are designed to be shifted by any means possible at any time. (with in reason of course)
I have broken my share of trans parts, including gears, dawgs, forks, pawls, and so on in my 30 plus years of riding and racing. Still to this day my preferred way to up shift is under wide open throttle, not disengaging the clutch, apply pressure to the shifter. If it doesn't go imediatly, a slight bump of the clutch may be required.
To answer your question... shifting under heavy load (as you put it, race changing) does increase wear and tear on the drive train. If done properly, it's no worse than the alternative. With that said, these transmissions are designed to be used in severe competiton. They are designed to be shifted by any means possible at any time. (with in reason of course)
I have broken my share of trans parts, including gears, dawgs, forks, pawls, and so on in my 30 plus years of riding and racing. Still to this day my preferred way to up shift is under wide open throttle, not disengaging the clutch, apply pressure to the shifter. If it doesn't go imediatly, a slight bump of the clutch may be required.
Posted 24 January 2012 - 08:58 AM
Once the dog ears wear down a bit, the transmission will be a lot easier to shift under load. If you shift under load, the dog's will get worn down pretty quick and the square edge will turn into a round one. This will help tremendously with the gears meshing easier. There are only a few instances on a track where I shift under full load, I find it to be too risky to rely on that method of shifting. I tend to back off the throttle ever so slightly when I upshift, you can't even hear it in my video's its so quick, but that gives the engine just enough slack in the drivetrain to allow the forks to push the gears together without damage. Pry too hard on the lever to get it into gear and you'll break a fork right off.
So yes, there is a happy medium between WOT shifting and backing off the throttle slightly between gear changes, especially on 4 strokes.
So yes, there is a happy medium between WOT shifting and backing off the throttle slightly between gear changes, especially on 4 strokes.
Posted 29 February 2012 - 06:31 PM
no such thing as race changing hold it wide open wait till the power is flat pull in the clutch shift and repeat that simple
