clutch in coasting, OK? - Page 6 - Fuel Economy, Hypermiling, EcoModding News and Forum

The Atomic Ass · 10-11-2009, 09:24 PM

There is a bolt on the exterior of the Ninja 250 transmission called "Neutral Position Bolt", according to the fiche. Does anyone know what that bolt does? The fiche doesn't show how it interacts with the other parts in the transmission, and I'm a little wary of unbolting it to find out without having some idea of what I'm getting into first.

Christ · 10-11-2009, 09:27 PM

If I had to guess, I'd probably say it has something to do with how far you go before you hit the neutral detent.

For instance, on my TwinStar, N is all the way down, half click up. On mine particularly, that half click happens closer to 3/4 of the way up, if not a little further. Sometimes, I actually get it into 2nd instead of N, but I can tell by the feel of the click.

I would say that bolt probably adjusts how far up the lever goes before actuating neutral.

The only other thing I can think, and I wouldn't imagine it being correct, is that it adjusts neutral to some other position between gears. Again, I'm sure that's not even close to correct.

The Atomic Ass · 10-12-2009, 07:18 AM

Quote:

Originally Posted by Christ

The only other thing I can think, and I wouldn't imagine it being correct, is that it adjusts neutral to some other position between gears. Again, I'm sure that's not even close to correct.

That would be awesome if it is true.

dcb · 10-12-2009, 07:34 AM

It may just push the spring into the detent ball too.

Christ · 10-12-2009, 12:35 PM

Quote:

Originally Posted by dcb

It may just push the spring into the detent ball too.

This would reduce the travel necessary in the shift lever to engage neutral, correct? That's what I think it's for, anyway.

dcb · 10-12-2009, 01:32 PM

you can think that if you like

But the typical shift drum has a groove cut in it that the detent ball will drop into when it is in neutral. You can add another groove between, say, 5th and 6th (or 3rd and 4th) with little more than a dremel and some dissection, but getting the new groove located accurately is the challenging part since you basically get one chance.

I'd need to see a diagram to imagine this bolt is anything other than a bolt that pushes on a spring that pushes on a ballbearing that is waiting for the neutral groove on the shifter to come around again.

Christ · 10-12-2009, 02:44 PM

Mr. Ass, can you post the diagram you're looking at?

Formula413 · 10-12-2009, 09:59 PM

Just to jump back to clutchless shifting for a minute, I found that I actually can get my Vulcan to do it, it just takes some finesse. It's actually quite easy to do between 4th and 5th, and pretty easy between 3rd and 4th. In the lower gears it's a lot trickier. I think that's why I wasn't able to pull it off before, I was trying 1-2 and 2-3 shifts.

Christ · 10-12-2009, 10:02 PM

I can shift my 185 at full throttle without the clutch. It only has 18 HP at 9500 RPM, so it's not a big deal.

The more torque you have on the gears, the harder it will be to shift when not using the clutch, generally. Engine speed makes a HUGE difference in your ability to shift without the clutch.

The Atomic Ass · 10-14-2009, 07:34 AM

Quote:

Originally Posted by Christ

Mr. Ass, can you post the diagram you're looking at?

Fiche is here, click on Gear Change Drum if needed, and it's in the upper left.