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post #1 of 11 (permalink) Old Aug 7th, 2013, 10:26 am Thread Starter
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gear skipper

when im racing at at light i go thru 1st then 2nd winding out not noticing the tach, but then it wont go into 3rd and im always ahead until that point...? its like the gearshifter on the k1200gt goes soft no click there, is that the rev limiter preventing it or the clutch not disengaging?thanx

Last edited by mangomoco; Aug 7th, 2013 at 10:30 am. Reason: spelling
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post #2 of 11 (permalink) Old Aug 7th, 2013, 1:08 pm
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I have not found my K12 shift to be slick for racing changes and have sometimes had an unpredictable result around 3rd. The linkage is all a bit clunky.

Practice clutchless upshifting first without working the bike hard. Then you will find where the engine rpm and roadspeed sweet spots are for each shift. When you move out of those points up to higher rpm, that's when I sometimes get an unpredictable result.

These bikes do not have engine flywheels and rely on the rear wheel drag for that. I suspect that more direct linkage from engine to rear wheel makes for a faster speed rolloff on the upshift, precisely when you want the transmission gears at constant speeds for a second or two to change mesh into the next gear.



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post #3 of 11 (permalink) Old Aug 7th, 2013, 3:15 pm
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In addition to VOXMAGNA idea(s), you should put the bike on the centerstand - while the rear wheel is up in the air with ignition OFF, move thru ALL the gears with you hand (sitting on the ground on the left side). To do this, you will need to move the wheel back and forth a few inches of rotation to mesh the gears (as you move the shifter).

The goal of this exercise is to find in a quiet and static condition, if you can feel any differences between each gear. When riding, with the noises and the resistance of the boot, it is sometimes hard to tell where the "real" problem comes from.

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post #4 of 11 (permalink) Old Aug 7th, 2013, 3:28 pm Thread Starter
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gear skipper

Thanks for the response. I guess my question is more directly ; when i hit this speed or rpm limiter at the end of each gear's redline range,is there also an inherent incapability of the transmission to shift as if the shifter just moves upward with no resistance?
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post #5 of 11 (permalink) Old Aug 7th, 2013, 7:08 pm
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And when you are racing at lights....do you have time to release the shifter fully between gears? If not it won't shift up.

You need to adjust the shifter, lube the mechanism and go practice somewhere else. But I am a country boy we don't need lights.

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post #6 of 11 (permalink) Old Aug 7th, 2013, 7:26 pm Thread Starter
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gear skipper

You know you may be right I'll try it again . I may not be releasing it all the way, thanks.
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post #7 of 11 (permalink) Old Aug 7th, 2013, 9:43 pm
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Quote:
Originally Posted by mangomoco
You know you may be right I'll try it again . I may not be releasing it all the way, thanks.
And go try that in the country where you can also watch the tach/rev limit. You won't get the best performance bouncing off it and that's not where the best shift point for max acceleration is that's for sure.

Don't you guys have dragstrips down there?

Benelli 50cc at 14
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Honda CB 750 F at 18
Honda V45 Sabre at 24
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post #8 of 11 (permalink) Old Aug 8th, 2013, 4:47 am
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I don't do much hot starting away from lights, except to beat cars. I did once follow a crotch rocket and as I shifted up, he had changed twice as much as my K and his motor was screaming up to 10k as most smaller Jap bikes do. On town roads with lights, I would have thought 3rd or 4th gear to redline would be sufficient to prove a point?

The heavy K's are never going compete with the lighter more powerful fast revving Jap bikes. But cruise for an hour on the big highways and see how many of these bikes you are passing in the slower lanes.



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post #9 of 11 (permalink) Old Aug 8th, 2013, 6:28 am
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I have found that keeping some slight upward pressure on the shift lever before the next shift helps smooth things out. It is important to allow the lever to return to it's at rest position before apply throttle as well. It's a finicky beast, but when you get it all just right, it signs! ... and you grin.

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post #10 of 11 (permalink) Old Aug 8th, 2013, 12:31 pm Thread Starter
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Cool gear skipper

I guess its as they say, " its not how fast you go, its how well you go fast."
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