| Author | Message | ||
     Ezblast |
So all XB's are getting the new style tranny - does this go for the Blast as well? GT - JBOTDS! EZ  | ||
| 99buellx1 |
Nope. | ||
| Ezblast |
you mean they would keep an old style tranny for one model only - that doesn't make sense - especially if they are trying to be cost effective - besides even the Blast could do with better shifting - lol GT - JBOTDS! EZ | ||
| Glitch |
Maybe next year will be the year of the Blast! After all it's the only Buell left untouched. | ||
| Snowdave |
But will the tranny retrofit to my 2000 M2? | ||
| Glitch |
Doubtful | ||
| Ezblast |
I just read that all HD/Buell Sportster products will have the new tranny, so how could the Blast be left out - doesn't make sense, what they are going to do - make old style tranny's right by the new? - lol GT - JBOTDS! EZ | ||
| Whodom |
Ez, The 2006 spec sheets describe the Blast transmission as "5-speed, constant mesh", whereas the XB's are described as "5-speed, helical gears". Maybe they're just using up left-over parts this year for the Blast transmissions. I'll bet Glitch is right; the Blast is overdue for an update. | ||
| Glitch |
Would I lie?  EZ, your package is in the mail, I got busy and, to be honest, forgot all about it until now. Sorry. | ||
| Thunderbox |
They just probably have a 1000 old trannys to us up so the blast gets what is left. They will change them out when all the old ones are used up. Every manufacturer does the same thing when they make changes. Yamaha is famous for it specifically in their snowmobile line. | ||
| Lake_bueller |
Remember that the Blast still uses the old Evo motor as it's base. The XB motor is completely different on the lower end (i.e. no trap door). The new XB transmission also won't work in the tubers for the same reason  . After riding the new Uly, the old transmission is a POS (Message edited by lake_bueller on August 22, 2005) | ||
| Rick_a |
Uh, the Revo motor is what's in the V-Rod, aint it? All Buells and Sportsters are based on the Evo XL. Call it new if you want, but the architecture is the same. | ||
| Ezblast |
The Blast and XB shared the same tranny till the o6 model, just waiting to see if the Blast would be updated as well... it would be nice if before they discoed it, if they updated it to something fresh to up sales - lol - very few recall the tubers it resembles with the XB's on the market, thus it looks dated, even though it isn't. GT - JBOTDS! EZ | ||
| Sarodude |
Uh, the Blast doesn't have a trap door. -Saro | ||
| Burnmyheartdown |
Why would they use left-over parts? Aren't they required to carry enough parts to support their product for something like ten years? That means they'll still have to stock tranny parts in 2015. | ||
| Cataract2 |
So... What are the pluses and minuses between the constant mesh and helical gears? | ||
| Steve_mackay |
Burn, that's an old wive's tale. They aren't required to stock parts beyond emissions equipment IIRC. | ||
| Thunderbox |
Actually the old gears were spur or straight cut, the new gears are helical. Bennifits are helicals are much quieter and mesh easier, they also are less likely to break because more of the tooth is in contact with the round part of the gear. There is also less pressure on the gears because they are longer and more of the gear is in contact with the mating gear. This translates to less wear. They do however need a different lubricant as there is a wiping effect each time the gears contact the other. | ||
| Spatten1 |
If I remember correctly, helical cut gears also create a "side load" which normally requires a different combination of thrust washers and bearings. | ||
| Thunderbox |
That is absolutely true. That is also why it requires a different lubricant. That property is called shear resistance. A twisting under pressure effect. | ||
| Xldevil |
 XB trans  tuber trans (Baker 6 speed) helical cut vers. straight cut Regards,Ralph (Message edited by xldevil on November 27, 2005) | ||
| Panic |
"Constant mesh" is not the opposite of helical gear. It has nothing to do with helical gear. Constant mesh is what happens when you let the sales department write engineering literature. It's like those car ads that used to proudly announce "independent front suspension", as if it were: 1. new 2. different 3. unique to this product None of these are true. They're all constant mesh. The last H-D sliding gear (opposite of constant mesh) transmission was 1939.} (Message edited by panic on November 27, 2005) | ||
| Jlnance |
Panic - Whats the difference between constant mesh and sliding gear? | ||
| Jackbequick |
In constant mesh every drive path between gears on the upper and lower shafts are always in mesh. Which drive path is used is selected by moving one or more sliding dogs. In the sliding gear transmission gears are slid along the shafts to engage and disengage gears. Some sliding gear trannys may have a dog also, it is generally used for 1:1 drive or high gear. Note in the pictures that Ralph posted that there are still two straight cut gears in the XB tranny. So it the advertising pundits wanted to get the description right it would be a "constant mesh transmission with mostly helical gears". Did anyone hear the one about the dyslexic agnostic insomniac that lay awake at night wondering about the existence of Dog? Jack | ||
| Jlnance |
In constant mesh every drive path between gears on the upper and lower shafts are always in mesh. Which drive path is used is selected by moving one or more sliding dogs. Thanks for the explanation. I gather then that when I shift and hear "gears" grinding, what I'm really hearing is the dogs grinding? | ||
| Panic |
Yes. The gears are always "engaged", the dogs determine which ones (if any) are transmitting power by locking them to a rotating shaft or another gear. A transmission with separate dog components (like big twin) has gears in fixed lateral position, only the dogs (shifter clutch) move. Costs more to make, cheaper to rebuild. A transmission with integral dog components (like XL) requires more effort to shift (the extra mass of the gears must be moved). Cheaper, lighter, easier to assemble and adjust. |
