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397 Posts
Ok well I suspect this is probably rather a 'dumb question, but to me, the dumbest are the ones you don't ask... and there is a LOT of experience on this forum, so I would appreciate your thoughts and comments - DO try and be helpful as well as calling me a dumbass! 
On Saturday I had my Sprint up on the center stand for cleaning, oil checking, etc.... So I ran the engine to warm and circulate the oil before checking.... and I have been experiencing 'some clattering noise' so I decided to pop the bike into gear and have a listen.... well I knocked it up to about 3 /4th and left it on tickover while I walked around and looked (yeah yeah it will leap off of the stand and run away, ok got that one out of the way...).... and I noticed the bike was 'shaking up and down' pretty badly - the frequency of this changes with the speed of the back wheel - so obviously something to do with wheel balance / not being round / etc I suspect... Now I have done this in the past with other bikes and they do NOT exhibit this, the wheel just spins... So... I looked at the end of the axle and that appears to be centered.... I looked at the wheel rim and that appears to be round (looking at the top edge to see if it 'goes up and down' as the wheel spins)... I looked at it from the back to see if it 'moved from side to side' - looked ok... very slight side to side.... However, I DID notice that the brake disk and ABS ring WERE moving up and down slightly as the wheel rotated (I would guess 1/8 - 1/4 of an inch).... And also 'the top of the tire' when viewed from the side seemed to be slightly. So my dumbass question is: Does this sound normal / acceptable to you or what do you think the problem could be and how should I go about rectifying it.... I AM thinking this could explain some of the 'lack of confidence' the bike seems to exhibit, especially at certain speeds and when cornering.... I don't want to take it back to the dealers and look a right dick getting into it with them if there is nothing wrong, but all my experience and mechanical knowledge is telling me this is not right or a good thing - so flame away please!! Oh and Oldndumb & Dave - I especially want your input!
On Saturday I had my Sprint up on the center stand for cleaning, oil checking, etc.... So I ran the engine to warm and circulate the oil before checking.... and I have been experiencing 'some clattering noise' so I decided to pop the bike into gear and have a listen.... well I knocked it up to about 3 /4th and left it on tickover while I walked around and looked (yeah yeah it will leap off of the stand and run away, ok got that one out of the way...).... and I noticed the bike was 'shaking up and down' pretty badly - the frequency of this changes with the speed of the back wheel - so obviously something to do with wheel balance / not being round / etc I suspect... Now I have done this in the past with other bikes and they do NOT exhibit this, the wheel just spins... So... I looked at the end of the axle and that appears to be centered.... I looked at the wheel rim and that appears to be round (looking at the top edge to see if it 'goes up and down' as the wheel spins)... I looked at it from the back to see if it 'moved from side to side' - looked ok... very slight side to side.... However, I DID notice that the brake disk and ABS ring WERE moving up and down slightly as the wheel rotated (I would guess 1/8 - 1/4 of an inch).... And also 'the top of the tire' when viewed from the side seemed to be slightly. So my dumbass question is: Does this sound normal / acceptable to you or what do you think the problem could be and how should I go about rectifying it.... I AM thinking this could explain some of the 'lack of confidence' the bike seems to exhibit, especially at certain speeds and when cornering.... I don't want to take it back to the dealers and look a right dick getting into it with them if there is nothing wrong, but all my experience and mechanical knowledge is telling me this is not right or a good thing - so flame away please!! Oh and Oldndumb & Dave - I especially want your input!