XB-600 Have Questions, Need Answers
I recently changed parts between the 2 XB-600's I've got to make 1 great bike. I learned (the hard way) that though both bikes look the same, some of the parts are different. Differences I noticed range from: rear wheel configuration & parts, front shock size, tube size, etc...
First question: Wheel alignment/placement: what is the best configuration with washers and such? Is there a mathematical formula or something to figure out how far forward or back the rear wheel should be placed? I've looked here and on other sites to find out what the correct alignment/placement should be but to no avail.
Second question: 72 volt mod: What parts are required to perform the 72 volt mod (i.e. mosfet, etc)? Would it be better to just purchase a 72 volt controller and if so what would the specs on it be (i.e. watts, etc)? Where may one purchase said parts and/or controller?
Third question: Breaks: I've used the spacers, washers and nuts on both wheels according to the directions and without the breaks they both spin freely with no wobble. When I attach the breaks and tighten them enough to make them effective they inhibit the free spinning of the wheels. Any suggestions?
The XB-600 with 60v mod has been great. I've enjoyed modifying it almost as much as riding it. I'm hoping that with the parts for the 72v mod I'll be able to repair the second bike; at the moment it's just spare parts in need of a working controller.
I look forward to your responses. Thanks for the help!
Eagleye
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Re: XB-600 Have Questions, Need Answers
The only variable in REAR wheel alignment is to be collinear with the front wheel contact patch. A straightedge from the rear tire should just touch the front tire on each side. The slots in the rear swing arm are there to allow this adjustment.
Keep playing with them until they spin freely with no wobble WITH brakes installed. This is crucial.
Indeed, the wrenching can be as much fun as the riding.
Mark
Re: XB-600 Have Questions, Need Answers
Thanks for all the great help. I'm still not clear regarding rear wheel alignment/placement.
I understand being collinear (inline) with the front wheel. When you say "A straightedge from the rear tire should just touch the front tire on each side".... What do you mean by "straightedge"? Will said straightedge be a certian length, or are we just talking about using a yard stick? also what do you mean by "front wheel contact patch"?
Though I grew up in a garage, I guess I'm just not up on the terminology.
Your continued help is greatly appreciated!
Eagleye
Re: XB-600 Have Questions, Need Answers
Straightedge = any REALLY straight object that is rigid enough to give you a good reading. I use a piece of 1 x .5 AL bar, long enough to reach from the back to the front. You rest it against the rear wheel about 5" from the ground, making sure it touches the wheel at both the front and back. Now look at the front wheel. Is the bar touching the wheel? Is it away from the wheel?
Front wheel contact patch = the spot of ground where the tire touches the ground.