Stumble in most or all gears

1348 Views 10 Replies 4 Participants Last post by V-Twins, Dec 4, 2013

V-Twins

Discussion Starter · Nov 20, 2013

Hey everyone so once again my luck with my new TL has not been great, just got two seals and a gasket replaced last week (it was leaking oil all over my garage floor :banghead ). Just to clarify my bike has had a stumble since I got it, it didn't really bother me and wasn't that bad (contained to one or two gears and not very noticeable) and usually mostly went away after the bike warmed up. Now even after riding for a while it stumbles pretty badly in gears 1-4 between 3k and 6k. Its to the point where it is not only very annoying but is becoming a safety issue since the bike does it when I am cornering if I am on the throttle. It idles fine, doesn't stumble below 3k or above 6k (or if it does I cannot notice it). Other than that my bike is running fine. I was wondering if anyone had any suggestions on what to look for? :confused I am not a motorcycle expert but I am mechanically inclined enough to do basic work.

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snowblind

· #2 · Nov 20, 2013

Would that "stumble" be at about 4K-4.5K rpm? If yes, where are you based? I know a man with a yosh box who can sort that out in very short order.
Let me guess - oil leak was the clutch cover?

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The Ring-In

· #3 · Nov 20, 2013

if its an R it may have something to do with the transition of the second injector.

start with NEW plugs and a double dose of injector cleaner in the tank and a decent run ( 1/2 tank at least )

then look at a scratchy spot in the TPS.

http://www.tlplanet.com/forums/showthread.php?t=92062&highlight=tps

if you bought this bike second hand then get it yoshed back to std and see if that helps.

if so then try chasing it out with the yosh.

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Six5

· #4 · Nov 21, 2013

The Ring-In said:
....
then look at a scratchy spot in the TPS.

http://www.tlplanet.com/forums/showthread.php?t=92062&highlight=tps

......

:stupid

I'm leaning toward an iffy TPS.

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V-Twins

Discussion Starter · #5 · Nov 28, 2013

Is looking at/adjusting the tps something I can do or is that more of a professional job? And also since were talking about the stumble I dropped my bike because it coughed hard when I was doing a slow tight corner on a dead end dirt road (it was paved but right at the end where I turned around it was dirt). It was a very very slow drop and I actually wasn't even moving at that point. My bike barely got scratched but the clutch lever got bent (a rubber mallet fixed that in no time) however now it seems like my steering is all squirley and it makes me nervous, I cant see anything wrong with it but when I am cornering, especially while going slow it definitely seems off balance or somehow just not right. I don't see how I could have damaged anything, it literally fell in slow motion and I have some big ass frame sliders on it (thank god). Anyone think I could have messed up the forks or something?

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Six5

· #6 · Nov 28, 2013

V-Twins said:
Is looking at/adjusting the tps something I can do or is that more of a professional job? ...

You are fully capable of setting the TPS.

Watch this youtube video and come back with any questions you may have.
http://www.google.com/url?sa=t&rct=...=WT0US5ZqwA7p0YZX2go0TA&bvm=bv.57155469,d.cGU

While you are playing with the TPS, be sure to do the resistance test The Ring-In noted earlier.

V-Twins said:
....
And also since were talking about the stumble I dropped my bike .... It was a very very slow drop and I actually wasn't even moving at that point. ..... however now it seems like my steering is all squirley .....especially while going slow it definitely seems off balance or somehow just not right. .... Anyone think I could have messed up the forks or something?

It is not likely that you bent or moved anything to affect the steering - unless something was already loose. :dowhat It may be that you are just more sensitive to it now. :O At any rate, now is a good time to go through the suspension and steering components to make sure everything is aligned and properly torqued.

Is the rear wheel straight? Not cocked to one side from a chain adjustment gone bad?

Is the movement of the steering head bearings smooth or notchy? No excessive play?

Are there flat spots worn in the profile of the tires?

Wheel bearings good?

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The Ring-In

· #7 · Nov 28, 2013

have you run the injector cleaner yet?

if not then do so before you go changing anything.

if you cant then get them cleaned ultra sonically .

you need to have the base items right BEFORE you go making assumptions or changes.

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V-Twins

Discussion Starter · #8 · Dec 2, 2013

So I put injector cleaner in for two fill ups and it still stumbles, although I haven't had time to look at the tps yet. However I do have some good news, the steering problem got worse and I began to suspect the tire may be low although I couldn't see how low it actually was because the fairing blocks it from view when riding. After hooking it up to my trusty bike pump and fully expecting it to be in the 20s somewhere I was surprised to see that it was at 10-12 psi. After pumping it back up to 36 all the steering issues seem to have gone away

The only reason I did not check this sooner was because my bike was in the shop 2 weeks ago and I watched the guy top my tires off. I guess there is either a slow leak or this cold weather is sucking the air out of my front tire because the back one is fine.

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Six5

· #9 · Dec 3, 2013

V-Twins said:
....I was surprised to see that it was at 10-12 psi. After pumping it back up to 36 all the steering issues seem to have gone away ......

Now you know what low tire pressure feels like. :banghead

Don't let it happen again. :laugh

BTW, it's not recommended to look at your tires when you are riding. It has been known to cause accidents....

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The Ring-In

· #10 · Dec 3, 2013

so you still havent said whether is an R or S .

they are different...........

in the mean time check all the hoses on the throttle bodies especially the one that links to the intake air pressure sensor.

its a black blob with one hose to it and a bunch of wires.

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V-Twins

Discussion Starter · #11 · Dec 4, 2013

My bad, its an S. Upon visual inspection all the hoses and connections look great. The bike is in really good condition it has been garage kept and all the hoses, wires, and other plastic bits are in great shape.

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