Buell 1125cr Dyno at AF1 Racing

This is the new Buell 1125CR carrying in it's frame the Rotax 1125cc engine with some very Aprilia-esque parts like the pneumatic slipper clutch. This bike came in the other day for a dyno test of the new Drummer exhaust/slip on kit. The owner had also already removed the airbox cover. The engine could benefit to a small degree from more precise fuel tuning but overall the motor and the exhaust gases were well within the "safe range" in terms of air/fuel or mixture. The Drummer pipe designed by Kevin Drum is freaking loud, not as bad as the D&D option but loud none the less. More power for sure can be found in the 1225 motor but not with Buell's unconventional underbike pipes. Header pipes are unequal length, collector length is VERY compromised by the underbike design. If only Akrapovic would make a proper 2:2 for the 1125 like their EVO6 pipe for the Aprilia V990RR series of Rotax engines, much could be gained. I know the video quality is lacking but the camera I used for this video has better audio quality in the dyno room than the Sony I normally use and I know everyone wants the best possible audio on the new Drummer pipe(s).

Category:

Autos & Vehicles

Tags:

• Aprilia
• Rotax
• Buell
• 1125
• 1125r
• 1125cr
• dyno
• dynojet
• pc5
• pcv
• pcIII
• pcIIIusb
• airbox
• mod
• Drummer
• exhaust
• sound
• pipes
• silencer
• slip
• on
• micah
• shoemaker
• micashoemaker
• ec997

[CyberDruidtheModGod]

I am hearing some popping at set throttle speeds...is that an audio glitch or is the bike misfiring? The pipe sounds pretty good to me.

[MicahShoemaker]

@CyberDruidtheModGod Not sure, the audio quality on this file blows, it was recorded in only 15 fps on a VGA cam with primitive mic. The Buells pop a bit when fully hot at lower throttle positions usually here in the Texas heat.

[CyberDruidtheModGod]

That makes sense. Thank you for the reply. I am still trying to wrap my mind (or wallet rather) around spending a $1000 on myself so close to Christmas lol.

[MicahShoemaker]

@CyberDruidtheModGod if the $1000 is for this pipe I would pass, you can make a pipe like this from parts bought at Pep Boys for less than $100 if you are the creative fabricator type. Hell one of my buddies bought a Dutch made full system recently for less than that, now that the brand is dead the parts are freaking cheap and getting "blown out" by vendors.

[MicahShoemaker]

True, most manufacturers do quote a "crank" number which is impossible to obtain on most motorcycle engines since they designed and built "in unit" with the transmission an integral part of the engine. Belt drive looses only about 2% from the sprocket to the wheel and chain about 4% where shaft is closer to 6% in final drive losses. Basically most manufacturers dramatically overstate bhp to increase sales, much like the speedo error built into Busa's, it makes the owner "feel" the bike is fast

[MicahShoemaker]

Factory Pro Dyno reads about 15-17% lower than the more common Dynojet dynos, but manufacturer's always over promise and under deliver on claimed bhp and under promise and over deliver on weight. Aprilia for example claims 139 bhp on the stock RSVR, it puts about 108 bhp to the tire dead stock on my dyno. For perspective, dead stock GSXR 1000's are in the 132-134 bhp range, not the 162-168 seen in magazines. I dynoed Ducati's WSBK engines from the last of the 998RS bikes, true bhp 150 at tire

[LAFORZAMZ]

I just had my Buell 1125R Dyno'e by Mitsu of Bartels Racing team. with the Jardine RT 5 slip on not full exhaust and Eric Buell Racing ECM and Targeted Injectors and pulled 135.87 HP I'm not putting on the Full Eric Buell Full Racing Exhaust. I will update you on thats dyno run. On Pump Gas 91

Best Regards,

Mark Z

Buell 1125R

[Jon19277]

Oh and its a 1125r 08

[Jon19277]

Hey CYBERDRUID Do you know what Kinda Exhaust I would need to Buy at pep boys to get a nice Tone but not as loud as my D & D. Any idea's? I can weld and was gonna cut my D & D off in the middle and add a Box But don't know which one to buy and would I j=have to dyno it or I mean Would it mess it up to do so? Thanks. ( Jon B )

[CyberDruidtheModGod]

Well if anyone finds a vendor with a Drummer at a good price I would love to get a PM on it. Best I have seen is $995 before shipping...which seems like a lot for a can and connector pipe. I've found HMF and Jardine slip ons for $400 or less.

[smibru]

Can you tell us the torque numbers?

[puredrive]

BHP vs WHP...