| Author | Message | ||
     Duggram |
Would someone please tell me why they don't put an adjustable swingarm on belt drives. Then you could change ratios and still maintain that simple belt system. OR, am I missing something here? | ||
| Petebueller |
The amount you would need to move the belt backwards or forwards with pulley changes would be significant, though you could do a bit with the tubers I am told. Having said that a friend tried that on his M2 and had continual problems stripping the belt until he went back to stock. If you change the belt the speedo is wrong. Speed is now of the crank position sensor so I don't think you can adjust it like you could when there was a speed sensor. I like my belt how it is. No adjustment, no lube just easy. I changed the primary on my Firebolt to get the gearing I wanted. I'd look at that first on my 1125R is I wanted a change. | ||
| 99buellx1 |
I'm pretty sure it's for simplicity. The average Joe Rider just wants to ride and dosnt know how to adjust it correctly anyway. And, less maintenance, etc. There would be no reason that you couldn't do an adjustable swingarm with the belt, it's just not needed if staying stock ratios. | ||
| Kirb |
I think the RPM is crank, Speedo is tranny, and the gear position is the calculated ratio of the two (not a true gear position sensor). This is why you don't get gear positions at a stop. Any change in final ratio would screw up the speedo, but that's it. | ||
| Skntpig |
You had to run the belts so scary loose on tubers that most people usually ran them too tight causing premature wear. Belt slack needs to be very different from chain slack. | ||
| Justa4banger |
How about an auto tensioner? | ||
| Skntpig |
Yeah... got an auto tensioner already. Look under your shifter footpeg for spring loaded wheel. | ||
| Lastonetherebuys |
Speed is now of the crank position sensor That makes zero sense. turning say 4000 RPM in third and 4000 RPM in fifth you are going one hell of a difference in speed. Seeing as the crank position sensor measures the crank position there is no way it could measure speed. | ||
| Jdugger |
> Look under your shifter footpeg for spring loaded wheel. ... and then keep looking, because you won't find it. If anything on the stock 1125r is a belt tensioner, it's the rear axle. The entire final drive of an 1125r is *fixed*. Look again... | ||
| Justa4banger |
Thank you, because for a second i thought i was not seeing something. i have looked many times before and noticed the idler pulley is fixed. | ||
| Hootowl |
In contrast with the tubers, the drive on the XB and 1125 has zero (or close to it) lash. The belt manufacturer recommended MORE tension as a way to increase belt life. I don't know why anyone would want to reintroduce slop into a drive train that was specifically designed to eliminate it. The tuber belt was not designed to run loose either, but since it is possible to put too much tension on it through maladjustment, people tend to run it loose. | ||
| Kevin_stevens |
The crank sensor is used in conjunction with the gearing; the ECU knows what gear you're in, remember? This is almost universal now. KeS | ||
| Lastonetherebuys |
The crank sensor is used in conjunction with the gearing; the ECU knows what gear you're in, remember? would this not prove inaccurate depending on the terrain? example same gear same rpm up hill vs down hill. why wouldn't they just run a speed sensor off of the output shaft of the transmission | ||
| Kirb |
Kevin, The crank sensor is used in conjunction with the speed sensor...used to calculate the gear you are in, not the other way around. That is why you don't get gear positions until you are moving. | ||
| 99buellx1 |
Absolutely not. Going uphill at 3000 rpm in 3rd gear is the same speed as 3000rpm in 3rd gear downhill. | ||
| Kirb |
As far as the tubers go (current owner) the belt has to run loose because it gets tighter as the suspension compresses. You can cause output shaft problems if you run it too tight. | ||
| Hootowl |
Bingo, and since it's not all that easy to adjust for proper tension at the apex of the swingarm's travel, people simply run it looser than it needs to be, myself included. | ||
| Fresnobuell |
I like my belt how it is. No adjustment, no lube just easy. +1...it's great just slipping the axle in and knowing it's gonna be right everytime | ||
| Captain_america |
The instrument cluster does not display the gear your in when your not moving because the clutch is pulled in. Anytime you are riding, pull in the clutch and you get: -- | ||
| Kirb |
At the time the clutch is pulled in, the calculation of RPM to MPH won't be accurate. It makes sense the bike wouldn't display a number until it had the correct ratio. the bike wouldn't need to display (--) if it was really sensing the gear (80's honda sabre comes to mind). The calculation is where the gear position comes from. | ||
| Jdugger |
> At the time the clutch is pulled in, the calculation of RPM to MPH won't be accurate If you are careful, you can get the clutch to slightly disengage before it trips the switch. Thus, by giving the bike gas, one can make the gear indiciator "swing low" through the gears as it thinks it's in different positions... | ||
| Captain_america |
nice Jdugger. haha i never knew that | ||
| Petebueller |
Lastonetherebuys you're right. It was a bit late here when I was posting. On my 2007 Firebolt you could adjust the speed sensor, from 08 I'm pretty sure you can't you can't and I can't remember why. I'll have to look it up. | ||
| Justa4banger |
I would imagine whenever the clutch starts to fail and it slips the same effect of getting the gear indicator to move around will also happen. Good way to know if the clutch is slipping... or near replacement. |
