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Buell Forum » Knowledge Vault (tech, parts, apparel, & accessories topics) » Troubleshooting (Poor Starting/Running/Handling/Ride Issues) » XB9R finally running - but it unwinds very, very slowly... « Previous Next »

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Zektiv
Posted on Monday, December 28, 2015 - 10:09 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thanks to you guys and your words of wisdom, my xb9r had her first ride today - a short one in the neighborhood to make sure brakes work, the engine runs, clutch works, etc. It was... slightly terrifying and raised up a whole series of questions. I thought about posting the questions as separate posts, and if you guys think that's a better idea let me know and I'll split it all up. Any kind of guidance or direction is very much appreciated!

The biggest question was this matter of the rpm 'unwind'. At a standstill, I would increase throttle, then release throttle. Generally speaking (in my experience, at least) when you release the throttle it *usually* "unwinds" about as fast as it wound up. Maybe a smidge slower. In this case the rpms would come back down but it would do so very slowly. As if I were slowly coming off the throttle. Noticeably slow.

Now, the throttle tube doesn't snap like pretty much every other bike I've ridden. It's not sticky, it's just kind of weak on the return. Don't know if that's endemic to Buells or just mine, but maybe there's an adjustment I need to figure out there. Anyway, knowing this I would manually snap the throttle shut. Rev up, immediately close the throttle. RPMs would go up pretty quick, and then sort of slowly coast back down. Like maybe at half speed or slower. My first thought is that it's somehow related to the throttle cables - any advice on this would be awesome. Maybe it's normal? I don't know.

The second thing I noticed is that the bike shifts like crap. I mean, based on my reading/the web/etc I expected it to be... a little less than ideal... but it's just really, really bad. To compare, I rode my buddy's Uly and it's hard but it's not like this by a long, long shot. I don't even know how to describe it... first seems okay, getting into second feels like I gotta kick a soccer ball hard, third is sometimes easy, sometimes hard... didn't get past third. Finding neutral is hilariously difficult. Sometimes the neutral light doesn't even come on. My buddy rode it and he went from first to neutral twice before realizing that to get to second he had to get serious about it. ANY help on how I can mitigate this, adjust it, replace it, whatever, please... I can't believe a transmission like that can be considered "normal" by anybody.

I also got weirded out by the scraping brake sound thing but I posted about that in the "Brakes" section.

I'm new to Buells so please be gentle - I'm sure this is all very obvious stuff to the experienced, and I'm learning as I go. I really appreciate the help in getting her to this point, and any help with diagnosing and resolving these issues.
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Akbuell
Posted on Tuesday, December 29, 2015 - 09:54 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

If you have said you have a service manual, I missed it. If you don't have one, get w/Al at American Sport Bike and get one. Most valuable tool in the box.

As to the throttle, make sure the cables are properly routed and lubed. Check the return spring on the throttle body. If the engine slowly returns to idle when you manually close the throttle, check for air leaks; most likely the intake manifold gaskets. Could be the O rings to the fuel injectors, but that is less common.

As to the shifting, pull the clutch cover on the primary cover, and make sure the 'ears' that the release mechanism rides on are not cracked and flexing. It happens. There is a repair for that somewhere in the archives here. If they are good, then check primary chain adjustment, then ride the bike for a bit to warm up the tranny, then drain and install new fluid. Then adjust the entire clutch release system, from the clutch to the lever, per the manual.

Re the brakes, start with the pads. If good, then look at the caliper mounting bolts. Basically a clean, inspect, and repair as necessary. If that is all good, then the disk attach bolts and associate bits may be dirty or sticky from brake dust or road debris, and not allowing the disk to 'float' on its mounts.

Hope this helps; please let us know how it goes . . . Dave
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Reepicheep
Posted on Tuesday, December 29, 2015 - 05:42 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The butterfly shaft in the center of the throttle body can wear and break as well, which could be pretty bad news, so check that closely also for play missing chunks or screws.
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Brother_in_buells
Posted on Wednesday, December 30, 2015 - 11:41 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

A lot of the xb serie have the trottle/wires sticking ,so It's not a real issue. (It's hard to get them working perfect in all directions)

For the clutch issue ,do like the others suggested ,check everything and adjust
and position the shift lever so it works with your foot position.
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