Triumphrat

Boriqua

I took my T100 on a twisty two lane up the side of south mountain. Nice ride but I realized that when I got off the gas approaching the next turn when I would get back on the gas to power myself through the turn the bike leaps forward. No matter how I modulated the presure at the throttle when I opened it it came on with a start and not smooth. Obviously when riding down the mountain and looking out over a cliff with no guard rail ... well it was disconcerting. What can I adjust to get a more smooth roll on from a closed throttle?
Alex

mistermellow001

It's hard to say what's going on, and with limited info to go on you may not get many suggestions. What you describe sounds like an "on-off" throttle behavior, which is not exclusive to motorcycles. The first thing I'd check is free throttle cable operation (good to do anyway). I'd also note whether the idle is too slow or rough, whether it hesitates on acceleration during moderate throttle movement, whether anything has changed (did you recently add mods or have it tuned up).

It could be as simple as your choice of gears in the twisties. I know that when I'm in too high a gear, I get very reactive throttle responses.

If it's carburetion, you could have out-of-spec relationships between idle speed, idle mixture, and secondary/power circuits (needles/jets, etc.). If everything is set and sized properly you should get a fairly even delivery of fuel from off-throttle on up.

If you could further define the problem, and the circumstances under which it ocurrs, plus a little more about how your bike is equipped (i.e., stock or modifications), others may have more intelligent things to offer than I.

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Guy

noitisnt

what altitude were you at?

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daddeo

if it ain't broke, don't try to fix it !!!!

amanger

You must be the first one with one of the new "fuel injected Bonnies" ha!ha!.Sounds like my Sprint with EFI the throttle is like a on/off switch.

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07 865 Silver Bonnie....Bobbed Guards, Tacho, Grab Rail, Lucas Tail light, Mini Blinkers, Dart Screen, LSL Sport Bars, 1" Longer Hagons, 10mm Raised Forks, K&N Pods, Staintunes, 140/40 3 1/2 turns + 1 shim......etc....etc...

mecscc

Guy is thinking right. (He agrees with what I would have said, so I know he's on the right track!)

If this is NEW behavior then look for a hanging up throttle wires, etc. When did you last check and lube your cables?

Are you one of those who likes a real low idle? Bad news in situations like you describe. Get the idle up well above 1000. You have a tach so settle it about 1200+ when you are doing vigorous riding, especially if you are doing a lot of down shifting and depending on engine braking.

And I strongly agree about people often being in too high a gear for the situation. I've ridden tight twisties around the hills I live in with a lot of guys who ride in 5th gear and 4th gear going around corners at 20 and 30 mph! AND they let off the throttle as they coast around, and then wonder why their throttle action is "abrupt" when they turn it back up! Keep the revs above 3500, regardless of mph, and, if you want even semi-serious performance, above 4000.

And, I agree that more info would be helpful. Other than that I disagree with everything he posted!

(Geez, great minds run in the same ruts (er, "channels" )

monte

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Monte

"The Old Ohio Preacher Man"