| Author | Message | ||
     Avc8130 |
I have always read that CR gearing was only possibly swapping the swingarm...BUT here is a 2008 with a BLUE swingarm and NO 2009 spools claiming (and appearing) to have CR gearing: http://cgi.ebay.com/ebaymotors/Buell-2008-BUELL112 5R-RACE-READY-ONLY-248-miles_W0QQcmdZViewItemQQhas hZitem4ceb7beb01QQitemZ330368281345QQptZUSQ5fmotor cycles What's the deal? ac | ||
| Chadhargis |
Perhaps it can be done without the swingarm change, but the belt tension won't be consistent. Heck, I don't know. | ||
| T_man |
I'd also like to discuss this further. Perhaps it has variable (not stationary) belt tensioner? I don't see one listed in the equipment on the bike though... | ||
| Xl1200r |
I just saw that bike today. All I can tell you is a Buell themselves says you need the swingarm. | ||
| Tnxbrider |
I agree that Buell says you must change swingarm. I don't know why a smaller idler would not work. This idler looks to be stock. What is with the red on the belt... is it rubbing somewhere, is it a stock belt? T | ||
| Xl1200r |
just an idler doesn't fix it - it's the total geometry of the belt. Don't ask me what exactly the issue it, but I can't imagine Buell would have made a swingarm a whopping .5" longer just for kicks, you know? I agree it seems weird, though. | ||
| Jdugger |
The belt is a step function. Because it has teeth, it can only change in size in specific increments. The radius of the power and drive pulleys also are step functions. Along with the length of the swing arm, the three work as a system of equations which result in a belt of a specific tension given specified gearing. The idler the depends on the geometry of the swing arm and suspension in order to take up the slack and still maintain the belt tension in the acceptable range. All of it works together. There's a great story where they talk about the design of the idler pulley, and that they exhausted the mathematical abilities of a spreadsheet in creating the formula or figuring it all out. You can probably change at will. But, understand, belt tension will be different, perhaps vastly so. This might reduce belt life, encourage tooth muching, or blow out wheel or drive pulley bearings sooner. | ||
| Chadhargis |
Why wouldn't they just convert to chain drive. It's a race bike that would benefit from the ability to change sprockets for different tracks. | ||
| Avc8130 |
Because the different pulley is WAY cheaper than the chain conversion? I wonder if the different pulley just slips past the allowable tension tolerance for too tight. Are you sure the swingarm is .5" LONGER for the CR? With a larger pulley I would have thought it would have been SHORTER...unless the idler changed also. ac | ||
| Jdugger |
I think the belts are different,too, between CR and R. | ||
| 1324 |
2 things: 1. If it were as simple as changing the idler diameter, Buell would have done it. True, its a machined and anodized pulley, but designing/producing/storing/selling two different idlers would have been less expensive than what is in production. The cost to change two castings is considerably higher...let alone the belt and the other logistics I mentioned above. 2. Jdugger is correct about the relationship between all three (four if you count the belt). Having worked with timing drives for almost 2 years, I know firsthand how much work goes into getting these things right. Everything must be considered: drive tooth count, driven tooth count, belt geometry, the relationships between all, etc. I don't know how in depth Buell went with analyzing the drive, but if you wanted to understand belt tension throughout swingarm travel, geometry plays a HUGE role. They could potentially have changed the swingarm length to reduce some dynamic resonance...hard to say. Strand motion is killer to belts/chains. Or, there might be a host of other unrelated reasons. Personally, I'd convert to chain if gearing was that important to me. | ||
| Avc8130 |
I wonder how far off the different pulley/belt is. If anyone was willing to supply the parts (sponsoring dealer/Buell/anyone just curious) I will gladly run it til it breaks on the street as a test. I need to price out the pulley/belt to see if it is worth it to me to try it. ac PS: I asked the Ebay Seller about the setup and I received this: "By running the CR gearing and belt with the stock swingarm we were able to increase horsepower to the rear wheel and also take away excessive load to the rear wheel bearings. This combo works great and will extend the rear wheel bearing life. As the swingarm moves through it's travel the belt gets even tighter so on a stock setup the belt goes from loaded to excessively loaded causing short wheel bearing life. We were able to take away some tension while at rest and still have the belt with enough tension to not create any problems." | ||
| Blackflash |
My guess is they used a can of spray touch up paint ordered from buell and sprayed a Cr swingarm .I do believe it is possible to do the Cr swap without swingarm change. | ||
| Avc8130 |
Blackflash: Nope. The swingarm in the pic has spools drilled in. No reason to do that to a CR swingarm. ac | ||
| Ft_bstrd |
My understanding was that the larger pulley created a situation whereby you couldn't make the idler pulley small enough and still leave sufficient give in the belt. What's weird was that a slightly longer belt wouldn't work either. That would have seemed the simpler solution but would probably have created a belt spring/shock loading problem with the belt. Wonder why it couldn't have been a combo of solutions utilizing a slightly longer belt and a smaller idler combined. | ||
| Husky |
Ask the seller the question! Husky | ||
| Avc8130 |
Which question? He said he used CR pulley and CR belt. Claims no issues. ac | ||
| Ft_bstrd |
The CR belt is the same as the R belt, is it not? | ||
| Avc8130 |
Can't be. Tension would be WAY up with the larger pulley and same belt. ac | ||
| Carbonbigfoot |
The belt on a CR is NOT the same as on the R.... Rob | ||
| Pizzaboy |
yaaa.. i see a couple things wrong with that bike. 1. 250 miles on the ODO, means that the engine isnt broken in yet, though looking at the pirelli supercorsa tires, says that the bike has definitely seen over 6000rpm. 2. that front body kit thing... wasnt that the darkhorsemoto or whoever's design that fawked up the radiator pod thing and quickly changed their design, because of the air flow problems with it being open like that was causing the engine to overheat? 3. WTF is up with that red paint on the belt? 4. dammit i want some frame sliders like that bike!!! | ||
| Froggy |
R - G0500.1AMG BELT DRIVE, 145 TOOTH Retail Price:$162.00 CR - G0500.1ATA BELT, DRIVE Retail Price:$175.00 | ||
| Avc8130 |
Any idea how many tooth the CR belt is? ac | ||
| Froggy |
149 teeth according to my paper 09 parts book. | ||
| Avc8130 |
So 4 teeth more. Anyone know the pitch of the belt? how about the diameters of the respective pulleys? Tensioner the same? ac | ||
| Froggy |
Different tensioner bracket, but same tensioner wheel. Here is sprockets: R - G0400.1AMD DRIVE SPROCKET, 70T, MAG Retail Price:$140.00 CR - G0400.1ATB DRIVE SPROCKET Retail Price:$140.00 It says 76 teeth for the CR. | ||
| R2s |
Not a good idea to drill the swing arm to mount spools. Its not thick enough in that location and it will crack in a crash or impact. I won't be drilling my new swing arm. It would be nice if the replacement 08 swing arms could come in blue but with the later spool mounts. | ||
| Zac4mac |
Pizzaboy - that was Free Spirits I think, certainly NOT our own Keith at Dark Horse Moto. The last picture shows AT and CT, it's an early 08. Those ICs were only made from Oct 07 to Feb or Mar 08 IIRC. Loretta had one. Pitch has to be the same for both belts - same front sprocket. Z | ||
| Avc8130 |
So to do what this guy did one would need: CR pulley CR belt CR belt tensioner bracket As far as the swingarm spools. For how often I crash vs how often I throw my bike on the stand...I am perfectly satisfied with my drilled swingarm. ac | ||
| Blazin_buell |
What's the empty container under the top fairing for? Radiator overflow? | ||
| Duggram |
Has anyone tried this method of using the CR gearing on an R? What kind of results did you get? |
