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Buell Forum » THUMPer Forum » Buell Blast Thumper Knowledge Vault » Diagnosing problems: » Transmission issues « Previous Next »

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Mgkoret
Posted on Friday, July 06, 2012 - 10:04 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

So, the other day i dumped my 05 blast on some loose gravel at about 20mph. Afterwards she ran fine. But in town the next day the bike started Grinding BAD and giving a horrible noise and eventually died. IV had problems with my shifter peg becomingloose and now the bike won't start.
My buddy thinks the "bushel" (?) In the connection of the shifter to the tranny is out and causing to much play, causing the grind.
What do you think??
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Gearheaderiko
Posted on Friday, July 06, 2012 - 11:38 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

To ask the obvious "is the shifter loose"?.

2nd would be "Is the shifter 'maladjusted'?" In other words has the bent shifters position made it more difficult to shift?

They've made the Blast to take a drop well and it does unless you've replaced the shifter toe peg with something besides stock. Then you might be more likely to have internal damage.
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Mgkoret
Posted on Saturday, July 07, 2012 - 04:55 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

It sounds internal for sure. The toe peg was already bent from a prev owner. Hadnt gotten a new one yet. No bueno
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Swampy
Posted on Saturday, July 07, 2012 - 11:18 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The recommended procedure here is to do the shift pawl adjustment, refill the primary with a 20W-50 full synthetic engine oil, adjust the primary chain (loose) then do a clutch adjustment.

All shall be well, it is hereby declared!
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Ezblast
Posted on Sunday, July 08, 2012 - 02:54 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Loosen primary, and clutch at adjuster and handle, then do shift pawl and then clutch, then adjust primary 14 flats out from torque value.
EZ
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Bumblebee
Posted on Tuesday, June 03, 2014 - 02:04 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I bought a used Blast, low mileage, but used as a Riders Edge Bike. I knew it had a transmission issue when I got it.

The issue was that a student (?) had fallen off the bike and the gear shifter had been banged really hard. Since the engine wasn't running (or the transmission wasn't spinning) the shift fork couldn't move the slider into the next higher gear. This caused damage to the shift drum.

See photos below -

When the drum was forced it deformed causing a dimple to form, this dug into the shift fork making it very difficult to shift.


Shift Drum Damage


You can see that the shift fork was also damaged when the shifter was forced attempting to shift into higher gears.



Fork Damage


You can see the huge gash the deformed shift drum made in the shift fork, it should be all smooth in the journal area. A roll pin engages the shift drum to the shift fork, this causes the shift fork to move back and fourth moving the shift dogs to engage the appropriate gear cluster.

Anyhow, the parts are here and it's back on the mend. Cost to repair, $500.00 in parts.

- Bee
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Gearheaderiko
Posted on Tuesday, June 03, 2014 - 02:10 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Very cool write up!

Thank you.
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Gearheaderiko
Posted on Tuesday, June 03, 2014 - 02:11 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Take a few more picks of assembly if you can. They are hard to come by, especially for a Blast.
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Bumblebee
Posted on Tuesday, June 03, 2014 - 02:16 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Here are a couple more photos -

If you ever wondered, this is a Buell Blast gear cluster


Gear Cluster


In this photo you can see the gear dogs that engage. In this case the a little knackered!


Gear Cluster Gear Dog
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Bumblebee
Posted on Tuesday, June 03, 2014 - 02:40 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

And more -

A Blast Engine with split cases split. Showing crank Shaft and bearings. Gear clusters on the left - in hand.


Split Cases


The Buell Blast (as all Buells) of this era have a jet that sprays oil into the bottom of the piston and barrel for lubrication.


Jet


Camshafts live here. Our Blasts have roller tappets. Pretty cool. Also, the drive for the oil pump (and pump) are seen here.



Cams go here


- Bee
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Reepicheep
Posted on Tuesday, June 03, 2014 - 03:39 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Weird seeing that cam cavity missing two cam holes, and missing the crank!

$500 in parts huh? Must have been a lot more replaced than you listed, or that shift drum must be stupid expensive.

I smoothed the raised lips on my M2 shift drum and put it back in, it worked well. I didn't have that kind of impact damage though.
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Bumblebee
Posted on Wednesday, June 04, 2014 - 03:38 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Yes, everything was stupidly expensive.

A couple of gear clusters, shift drum, three shift forks, top end parts, bottom and top end gasket set...

$Ouch$
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Bumblebee
Posted on Monday, June 23, 2014 - 01:23 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Just to give closure - it's all back together and runs like a champ. I also installed a new speedometer sensor, as the speedometer didn't work...I kinked the fuel tank vent hose causing the engine to stall when you needed it most, (getting on the freeway!) and the ignition timing was a little off - although I did set it with the LED method...with the strobe it was about 4 degrees retarded. This really helped with the big flat spot off the line. All fixed and good.




Little White Balst


All back together. The things you get on eBay...here it is in it's Barbie-esque cuteness.

- Bee
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Ezblast
Posted on Monday, June 23, 2014 - 01:56 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Sweet! - great job! Looks so cherry!
EZ
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