| Author | Message | ||
     Eulysses |
I have a new belt on...now with the bride on I feel the grating or rubbing/groan on the dips and bumps a lot more easily. It would be like knobbies rubbing on the fender on a real overloaded dirt bike. (Ya had to be a dirt biker in the 60's to appreciate that analogy) Belt getting too tight? What you guys think? Euly | ||
| Blasterd |
It's common, mine does it when 2 up and it has been discussed here before. Freaked me out first time I heard it! | ||
| Towpro |
first you have to guess her weight (because they never will tell you), then look in the owners manual and see how many "turns" you need to adjust the rear spring preload every time she gets on. Solved the problem on mine. | ||
| Od_cleaver |
Eulysses, Could it be that you are feeling the engine vibrations? My theory is that the belt tighten (on the compression or rebound) and pulls the engine mounts tight to one side. I call this grounding the engine mounts. This would transmit the engine vibrations into the frame. | ||
| Nobuell |
Was that something rubbing on the bike?  | ||
| Blk_uly |
the low vibes your feeling is the teeth of the belt. The alignment of pulley and belt change with the movement of the swing arm. perfectly normal. | ||
| Motorbike |
My 08 XT does that also. At first I thought I was just imagining things. After I dropped my lovely wife off at home, the vibration decreased significantly. The next time we rode two-up, I cranked about 5 more turns on the rear preload and that helped considerably but it is still noticeable. My biggest mistake was when I mentioned to my wife that the bike vibrates a little more than usual due to the extra weight. Why are women so sensitive about that subject anyway? Thanks. | ||
| Sidepipe79 |
The first time my GF saw me twisting up the preload before she got on she asked what I was doing. I explained to her the need to up the preload and suddenly she got all defensive and didn't want to ride. Luckily she enjoys riding as much as I do and got over it. | ||
| Eulysses |
It takes a girl 12 hours to get over her feelings and a guy one hour. God gave em lots of feelings. Good thing too, kids would never make it with a dad for a mom. The engine vibration transfer to the frame makes sense from a tightening belt. Euly | ||
| Etennuly |
There is an easy test I came up with for this theory of engine vibes transferring when the mounts are maxed out. Find your favorite dip in the road that noticeably does it, get it up to speed, pull in the clutch and kill the engine. Coast through the bump. This will confirm if it is actually the engine pulses you are feeling. | ||
| Motorbike |
Etennuly, sounds like a good test to me and I know of a huge dip in the road only about a mile from my house. I'll try that sometime but I'll have to admit that the dip is kinda fun to ride through with the Uly as it is so smooth! Thanks. | ||
| Rotorhead |
Mine does the same grunt/vib/groan even with a chain but considerably more noticeable with the chain over the belt. I think it is the longest pulley position of the swing arm when under compression making everything tight. I can make mine do the noise in a good tight uphill turn all alone. It did it over and over again all the way down the Dragon but it was a welcome noise!!! | ||
| Eulysses |
Makes one wonder about bearings but years of XB's and no bearing issues...wait a minute...did I just say no bearing issues? Hmmmmmm | ||
| Blk_uly |
I've tried the dip in the road grab the clutch thing. It does't seem to have any effect on the grunting vibe.  | ||
| Badrap |
Try killing the engine prior to hitting the dip and see what happens. | ||
| Blk_uly |
I did, there was no change. thats what led me to believe it was the teeth and the pulley. Since rotor head said his did it even with the chain I'm baffled. | ||
| Ratbuell |
Your swingarm mounts to your engine. More weight on the bike equals more weight (pressure) on the swingarm. More weight on the swingarm equals more pressure and road vibe being transmitted to the engine case...and from there to the frame, through the isolators. A Uly at GVWR (gross vehicle weight rating - or "fully loaded") is about TWICE the weight of any of the other XB's. I wanna say my '06 GVW's around 950? That's HD bagger territory right there...and it's easy to do. I know for a FACT that I've overloaded mine a number of times. And people wonder why Uly's are the only ones that have exhibited rear bearing issues....I *dare* you to load a normal XB to these weights (CityX, that was NOT a challenge LOL). |
