unstoppable atv (mods)

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Well almost unstoppable in mud.Rear swing armCut apartMove left flange toward center of axleMachine tube, fit rectangle tube for offset, added 6" to length Attached Images
Reply:Stretch driveshaft.Cut shaft, machine barstock extension, weld.First weld on positioner. Second freehand- it is an old shaky hand guided by old eyes that can't see worth a poop.
Reply:Originally Posted by castweldStretch driveshaft.Cut shaft, machine barstock extension, weld.First weld on positioner. Second freehand- it is an old shaky hand guided by old eyes that can't see worth a poop.
Reply:The machineswing armshot of rear axle showing paddlecloseup of steel paddle- couldn't turn right side up-sorryWhen he goes into deep ruts and the tires can not touch, the paddle that is attached to turning axle digs into the hump. The hump between two deep ruts usually just suspends  the axle, not allowing tires to touch bottom.No more "high center" problems.Peter Attached Images
Reply:Nice work so far ....... can we see a "before" pic of the bike?Something else you may want to try for fun, if you have a second "beater" quad sitting around: I've seen a bunch of people making reverse three-wheelers with old quads and motorcycles.  Frames cut in half on each, then welded together, one as a regular one-wheel-front-two-wheels-back configuration, the other as a reverse trike, "T-Rex" style.  Apparently the reverse trikes handle a lot better for the turns than the "normal" trikes, as the two front wheels give more stability.EDIT: Cancel above request for pics ...... ya beat me to it .....   Vicious-looking little beastie .... Specs?Last edited by SpyGuy; 10-24-2009 at 01:24 AM.
Reply:Looks good, Design looks alot better then ones i have seen done around here
Reply:Originally Posted by AB75901Looks good, Design looks alot better then ones i have seen done around here
Reply:I considered doing something similar to my bike in the past but was scared to ruin it.lolWhat did you do to lift the front of the bike without putting extreme angles on the front axles?
Reply:I assume its 4wd.
Reply:castweld,I am going to make a recommendation if you dont mind for any future axle mods that you may do in the future, please dont think I am taking anything away from what you are capable of or the job you did!We have done a lot of experimentation with half shafts for our Formula car.  Last year in Baja we spliced the axles using the same methods.  (All cars mentioned are with ATV engines and axles.  In the last years case, a turbocharged 450 that put out 72 hp and 50 ft/lbs).As far as the experimentation, we have tried the following:  straight cut the insert and shafts, chamfer and weld in a lathe.  In our Formula car, the axles lasted two laps.We have tried to fishmouth the insert, then weld, and those axles lasted one launch. Last, and most successful, we cut the insert at a 45 degree angle, and then welded it in a lathe.  EVERY axle with this method has lasted indefinitely, and had no issues.  Our Formula car from last year has not shown any signs of fatigue or failure, and we have thoroughly thrashed that car.All welding was TIG with ER70S-2 filler, and since we could not get the axles apart, there was no heat treatment.  The inserts up to this point have been 4130, but 4340 would be preferable.The insert wall and OD is dependent on the axle OD's and the power the engine produces.  This year we will probably buy 4340 tubing and go with that.Mechanical Engineer
Reply:Originally Posted by busymanI considered doing something similar to my bike in the past but was scared to ruin it.lolWhat did you do to lift the front of the bike without putting extreme angles on the front axles?
Reply:dang nice work. is it sitting nose down now? i cant enlarge the first pic to tell
Reply:Originally Posted by jackhdang nice work. is it sitting nose down now? i cant enlarge the first pic to tell
Reply:Originally Posted by castweldFront has extreme angle due to lift, a-arms are stretched for wider track and Gorilla Axles used. These are tough to break.Like to see pics/ drawings of your job. Always looking for a better way. I have not had issues with the above, when someone breaks a shaft it is in orig shaft just past splines. This is area is smallest diameter on driveshaft and is an area that I have not modified.I am assuming that the "insert" you refer to is the tubing you are using to replace the solid section in center of driveshaft?Peter
Reply:Cut two wheels off and you'll have an unstoppable ATV.