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Buell Forum / Buell XB Forum / Buell 1125R / Setting a street 1125R up to drag race
[Posts:  900 | Reputation:  32] Registered User
[?]   Posted:  05 Apr 2011 10:29
My parts arrived to set up a second wheel with a drag tire.

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/291.jpg

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/292.jpg

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/293.jpg
[Posts:  900 | Reputation:  32] Registered User
[?]   Posted:  05 Apr 2011 10:31
http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/305.jpg

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/306.jpg

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/307.jpg

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/308.jpg

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/296.jpg

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/297.jpg
[Posts:  900 | Reputation:  32] Registered User
[?]   Posted:  05 Apr 2011 10:32
Cleaned up the wheel.

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/303.jpg
[Posts:  900 | Reputation:  32] Registered User
[?]   Posted:  05 Apr 2011 10:33
The cleaned up air shifter bracket installed.

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/318.jpg
[Posts:  900 | Reputation:  32] Registered User
[?]   Posted:  05 Apr 2011 10:34
http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/330.jpg

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/331.jpg

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/332.jpg
[Posts:  900 | Reputation:  32] Registered User
[?]   Posted:  05 Apr 2011 10:35
I ordered a front trans pulley today as well as 3 different tooth pulley stocks. My intentions are to make a "Quick change" front pulley. I will make 27, 26 and 25 tooth setups. The 27 will give me stock R gearing while the 26 will put me in between the R and CR gearing and the 25 will get me real close to the CR gearing. I'll update the thread when I start machining.
[Posts:  900 | Reputation:  32] Registered User
[?]   Posted:  05 Apr 2011 10:36
It is all here. The compensating sprocket is going to be a problem. I fear once I cut it that I won't have any mating surface to attach to. I may have to come up with a plan B for it.

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/309.jpg

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/310.jpg
[Posts:  900 | Reputation:  32] Registered User
[?]   Posted:  05 Apr 2011 10:37
Heavy! ..and this is rotating mass.

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/311.jpg
[Posts:  900 | Reputation:  32] Registered User
[?]   Posted:  05 Apr 2011 10:38
I spent the day working on my quick change pulley set-up. I'm down to drilling and tapping the bolt holes and holes for the dowl pins.

To seperate the two halves of the compensating sprocket the ring that keeps the belt from walking has to be slid down.

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/333.jpg
[Posts:  900 | Reputation:  32] Registered User
[?]   Posted:  05 Apr 2011 10:40
This is what you will find inside, the equivalent of a cush drive. On mine all of the rubbers were broke.

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/334.jpg
[Posts:  900 | Reputation:  32] Registered User
[?]   Posted:  05 Apr 2011 10:41
Stripping away the unwanted pieces!

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/335.jpg
[Posts:  900 | Reputation:  32] Registered User
[?]   Posted:  05 Apr 2011 10:42
I used a cut-off wheel to remove the lugs that held the cush drive.

The material is hardened but not to the point where it could not be cut.

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/336.jpg
[Posts:  900 | Reputation:  32] Registered User
[?]   Posted:  05 Apr 2011 10:43
Turning down the diameter which will serve as the outside retaining ring for the new pulley.

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/337.jpg

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/339.jpg
[Posts:  900 | Reputation:  32] Registered User
[?]   Posted:  05 Apr 2011 10:44
Finished that and now on to cleaning up where I cut the lugs off.

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/340.jpg
[Posts:  900 | Reputation:  32] Registered User
[?]   Posted:  05 Apr 2011 10:45
A few passes to insure that the surface was flat and square to the outside lip.

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/341.jpg

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/342.jpg
[Posts:  900 | Reputation:  32] Registered User
[?]   Posted:  05 Apr 2011 10:46
The pulleys were cut to match the original width of the compensating sprocket.

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/344.jpg

As you can see there is a difference in diameter from the original center hub and the pulley center hole. There is also a height difference from the mounting flange on the pulley stock to the original cut up piece of compensating sprocket.
http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/345.jpg

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/346.jpg
[Posts:  900 | Reputation:  32] Registered User
[?]   Posted:  05 Apr 2011 10:48
Turning down a piece of stock to make the spacer needed to close up all of the differences.....

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/347.jpg

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/348.jpg
[Posts:  900 | Reputation:  32] Registered User
[?]   Posted:  05 Apr 2011 10:49
The spacer dubbed the "retaining ring".

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/349.jpg
[Posts:  900 | Reputation:  32] Registered User
[?]   Posted:  05 Apr 2011 10:50
No more gaps/space differences.

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/350.jpg
[Posts:  900 | Reputation:  32] Registered User
[?]   Posted:  05 Apr 2011 10:58
The original center piece of the compensating sprocket.

Cut the flange off.
http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/343.jpg
[Posts:  900 | Reputation:  32] Registered User
[?]   Posted:  05 Apr 2011 10:59
Turned down to maintain the original thickness of the compensating sprocket as well as maintaining stock bolt length.

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/351.jpg

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/352.jpg
[Posts:  900 | Reputation:  32] Registered User
[?]   Posted:  05 Apr 2011 11:00
The aluminum piece on top is the belt retaining ring. It will get drilled along with the flange which also gets tapped and drilled for 7/16" dowl pins. So I'll have 3 bolts holding the assembly together as well as 3 dowl pins to drive the pulley.

The new assembly with the 27 tooth sprocket weighed in at 2 pounds 6 ounces. That is 2 pounds 8 ounces lighter than stock. What affect do you think that will have on the motor spooling up? Rotating mass!

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/355.jpg

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/356.jpg
[Posts:  900 | Reputation:  32] Registered User
[?]   Posted:  05 Apr 2011 11:01
The 25 tooth magnesium pulley weighed in at 2 pounds even. 2 pounds 14 ounces lighter than stock!

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/354.jpg

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/353.jpg
[Posts:  900 | Reputation:  32] Registered User
[?]   Posted:  05 Apr 2011 11:03
I machined all three pulleys so I can maintain stock gearing as well as dropping two teeth in the front. I may consider machining one more pulley, a 28 tooth. This may help with some top end for the MPH runs.

27/70 = 2.59 to 1 Stock R gearing
26/70 = 2.69 to 1 (4% change) 1 down on trans sprocket
25/70 = 2.8 to 1 (8.3% change) 2 down on trans sprocket

After drilling and pinning the the hub next up is seeing how the belt and tensioner will take these changes. If there isn't enough movement on the tensioner to take up the two tooth change I may make a slightly larger idler pulley.
[Posts:  900 | Reputation:  32] Registered User
[?]   Posted:  05 Apr 2011 11:04
My intentions are to replace the idler pulley with a tensioner pulley. I have some preliminary belt tension readings from the stock set up and now I'm trying to convert them over to what the tensioner industry uses.

As a quick test I bolted a manual XB chain adjuster to the bike (with the sprocket removed). That will definitely take the slack up. Now it is a matter of getting the tension correct with either an elastomer or spring type self adjuster. For my application a manual adjuster is just fine as my suspension is strutted for drag racing hence no swing arm travel. However I would like something that will adjust on its own for the various pulley sizes while maintaining sufficient tension.

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/371.jpg

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/372.jpg

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/374.jpg

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/370.jpg
[Posts:  900 | Reputation:  32] Registered User
[?]   Posted:  05 Apr 2011 11:05
Here is the 27 tooth pulley pinned and bolted with the belt retainer in place.

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/376.jpg
[Posts:  900 | Reputation:  32] Registered User
[?]   Posted:  05 Apr 2011 11:06
I ordered a 180 and received a 190.

This gave me the chance to weigh the two tires.

The 180 weighed in at 11 pounds 10 ounces.
http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/375.jpg

The 190 weighed in at 13 pounds.
http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/296.jpg

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/297.jpg

A 1 pound 6 ounce difference.
[Posts:  900 | Reputation:  32] Registered User
[?]   Posted:  05 Apr 2011 11:07
I hit the track again last night. While it was still humid it was not nearly as hot as it has been.

I made 5 passes, 4 were 10.3's and 1 11.4 where I spun off of the line and the bike shifted into 2nd gear.

60' ET MPH
1.682 10.336 128.030
1.686 10.318 133.610
1.692 10.398 131.770
1.671 10.357 125.960
2.005 11.490 129.140

The bike felt good with the direct drive front sprocket. I had my tire pressure high as a starting point. I did expierence some tire spin so I will start dropping pressure to find what the tire/track likes. Something new, the bike was shifting into 5th at the line. This is a first as I would catch 4th before the traps and run through the lights with some RPM left. I'm considering lowering the front a little. I have to read up on this some however I noticed that the fast bikes were slammed.
[Posts:  900 | Reputation:  32] Registered User
[?]   Posted:  05 Apr 2011 11:09
I hit the track again tonight. I'm getting better a little at a time. I did experience a little tire spin from time to time. As the night went on I did drop the tire pressure some.

On one particular run the bike launched, spun, hooked and than shifted into second. It shifted so hard that the air box came up and slammed me in the chest knocking a little wind out of me. I was laughing like a little kid when it happened, that was cool.

1.644    4.357    6.587    109.750    8.532    10.218    138.100
1.669    4.405    6.636    109.710    8.580    10.256    136.330
1.663    4.373    6.604    109.770    8.548    10.221    133.700
1.628    4.338    6.581    109.070    8.538    10.221    132.990
1.673    4.386    6.638    108.520    8.613    10.320    133.100
1.633    4.378    6.648    107.580    8.640    10.364    131.500
1.630    4.306    6.560    108.340    8.545    10.262    129.800
1.647    4.353    6.621    107.800    8.616    10.344    128.870
1.626    4.340    6.618    107.600    8.620    10.353    128.650
1.678    4.354    6.610    107.900    8.600    10.323    134.400
1.623    4.305    6.572    107.250    8.571    10.297    134.270
[Posts:  900 | Reputation:  32] Registered User
[?]   Posted:  05 Apr 2011 11:10
I finished my tensioner project this week. The first one wasn't quite strong enough so I used the next one up which seems to be just fine. With 11 runs on the bike tonight everything is working as it is suppose to.

http://i191.photobucket.com/albums/z238/mlcorrell/2008%20Buell%201125R/379.jpg

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