The axle is a solid one, you just see the centers in the ends. After attempting a race at the West Michigan Sand dragway the other day on a very sticky track, I truely believe the aluminum axle needs to GO. It didnt break or bend, but when I had the power turned way up, I felt alot of vibration out of the back , and I never made a full pass down the track. In fact, I burnt up a clutch trying a second gear start with 17/56 gears. I now have heavy springs and the lockup clutch. The crazy thing is, that machine would do a 3rd gear launch with those gears. I just couldnt hold onto the bike. I have a 6 foot wheelie bar out back, and lowered to the ground. It really needs to have a custom seat made with a lower back support to keep the ars in place when launching.

Im going to be renting a sand track out in my area within the next month, just to get the seat time on a track I need. I have yet to make a full pass down a 300 foot strip with it. I need to turn the power down as low as it will go, and get used to that power at WOT. Then I can slowly increase the boost to a point I can handle.. Im not ashamed to say, its capable of way more power than I can hold onto.

Oh, about the axle, I will be replacing the aluminum shaft with a gun drilled 17-4 stainless prehard shaft. A ton heavier than the aluminum, but I could add an extra 150 lbs of rotating mass back there, and the machine would just ask for more.

Gary

I wanted to go light weight on the axle too but have found in the past that they just dont like torque. I had a brand new in the box stock DS axle which weighs a ton but I have found them to be unbreakable and I like the width for side hilling and ridge riding and I dune ride mine alot. I also like the security of big steel suspension parts. I'm getting to old to trust my life to ultra light aluminum tie rods or tiny little drag a arms. I cant flip end over end anymore and just get up laughing. LOL stuff breaks and takes a long time to heal. dont get me wrong, I'm not going slower the older I get by any means , if anything I go faster every time I make a trip to the sand but I'm just more aware of whats most likely to break and choose heavy duty mostly now instead of feather weight. on your clutch, did you install all 6 springs or just 3? and are you still running the factory lock up or something aftermarket like an MRE? I have springs here but havent installed them or had a clutch issue yet as I have had to take off in 1st gear because of a wheelie issue but at 9000rpm in first it still launches so hard that about 2 out of three passes I'm having to get out of the throttle because its going over on me. I end up shifting second then third and then just about hit the rev limmiter in 3rd and I'm seeing mid 90's on the hill. I would rather a second gear take off end up in 4th and not have to rev it so high and still break 100. thats my goal anyway . after I make a few changes I am going to drop a tooth on the front sprocket and try it in second gear but first Im going to have to go a few more inches on the swingarm and lower the front end with some shorter shocks.

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I got mine ! go build your own because mine fall apart.

When the clutch went, I replaced the springs with all 6 heavy ones. Way, and I mean Way to heavy for just cruising around. Also, with all 6 heavy springs, the clutch was either on or off, with absolutely no feathering available!! I hated it. With the centrifugal lockup from MRE, I am using 3 oems and 3 heavy springs. I replaced the 2 piece slipper clutch mechanism with a single from APE. Not sure what thats going to do for me, but they recommended it, and Im not about to find the problem on my own while riding. I am however, having a huge problem with stretching chains. At the West Michigan Sand Dragway, I litterally never got a full pass down the strip, but managed to have to adjust the chain twice in that time. Its an EK ZZZ chain also. Im not sure where to go from there, other than just keeping a close eye on the chain all the time. By the way, the motor is placed so the chain doesnt stretch or shorten thru its travel. I dont want to add any more inches to the swingarm, I have enough chain out there as it is, and I can run without guides now. I do have a custom guide designed in autocad that I used on past bikes. If you have access to a CNC, I can give you the cad file.

Gary

are you sure your bearing carrier isnt rotating under power? if yours is a 250r style carrier which I believe the jj&a stuff is , I have heard of this happening. you can generally stop this by rotating the carrier all the way around to the bottom side of its travel. its hard to explain but the carrier seems to only rotate in one dirrection. the same dirrection the axle rotates. if you have the cam lobe of the carrier on the top of the axle when the carrier rotates under power the chain will loosen. if you have the the carriers cam lobe on the bottom of the axle the chain will generally just keep itself tight . you will also gain a 1/2 inch of ground clearance in the back by doing this and the chain will adjust just the same. hopefully thats all it is. my experience with the ZZZ chains is that when they are brand new you will squish out some internal lube and have to adjust them maybe once or twice (small adjustment) then they flat stop needing attention. I set all my bikes up the same way, no change in chain tension through the whole range of swing arm travel . you can see how tight I keep my chain in the pics above. it looks extremely tight but I can still grab it and move it up or down about 2 inches . I just tighten it till there is no sag and call it good.

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I got mine ! go build your own because mine fall apart.

Edited: 07/03/2007 at 11:50 AM by supersonictoys

I will check that out. Never thought of it that way. Ive heard of others having good luck with that chain also, and was curious as to why mine was doing this. I will be giving another go this weekend on the 7th, I will certainly try that.

Very awesome DS. Love the busa motors in atv's.

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(R.F.L) Racing

-00 Yamaha Warrior
-00 Honda 440ex

wow that is a sick quad must be real fast howd u build it






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03 kx 250
07kx100

quad bart, must have been 4th gear . if he was doing 120 in third with the gearing he has he would be at like 15000 rpm's LOL. mine is at 10,000 at 95 in third with the same tires and gears I believe.

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I got mine ! go build your own because mine fall apart.

4th it was!! by the way, rolled the carrier the other way, and the problem stopped.

why are you selling your bombusa

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04 z-250, pro curcuit pipe, dg bumper, ac 6-pack rack, ac nerf bars, dynojet kit, graphics
84 250r work in progress
05 500 rincon (TANK)
04 z-250 stock white
198? bw 200

i wanna do that to my predator but put a sc vrod in it or should i go the the turbo busa way?

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polaris is the best because they are the most reliable!!!!

Not to sound like a broken record, but that looks very, very nice!

Not to sound like a broken record, but that thing looks awesome!

that right there is 1 sick atv

that is so cool

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Honda 250es

Ride Hard. Ride Safe. or Ride Home

"if you smoke you are committing suicide just taking your time"

funny joke must read http://forum.australian-media....=59660&#entry59660

Very very nice.. i wish I had the funds, a person to do it, and the place to ride something like that.

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2000 DS 650 - Stage III (Blown Motor, new build in progress) <BR>2001 Raptor 12:1 JE High Comp Piston, Yoshimura Comp Exhaust, Stage I Hot Cam<BR>2000 T-Rex - Ported Cylinder, Head, Exhaust, Clutch, Transkit, 28MM Carb, head and intake manifold.

one sweet machine!!!!

I totaly agree with you guys on the FEAR factor of owning a big bike I have only taken mine out to race twice and it is awesume to run but after a few runs my forearms are so pumped from holding on I have to stop and let the blood get back into my arms LOL. I have only had mine in fourth gear tapped and to me that is blinding fast I have had allot of fast bikes in my life even nitrouse injected and running on alchohol but nothing compares to the busa build and I can't even imagine mine with a turbo as is every time I take mine out when I get off my legs are shaking from all of the adrennalen pumping thru my body. It is the only bike that I have ever owned that scares the crap out of me every time I ride it but in a good way and that is why I love it so much. Just wish my teenage boys didn't love it as much as me now the wife is pressuring me to sell it befor one of my boys get's hurt.

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2004 DS 650 under construction being transformed into a DS 1300 Bombusa.
2001 Raptor 660
2006 Yamaha Rhino special edition
Ride Hard Die Fast
I came into this world bloody and screaming that's the way I want to leave.

tpsycho,
do you have any finished pics of your machine?? I know you were building it, but I dont think Ive ever seen it! I just finished dropping in a set of JE turbo pistons, along with a lockup clutch. I should be done reassembling in a couple of days, and the first race is on the 26th. I have a pizza wagered with a snomo powered tripple rotax machine on our first meeting of the year. Winner takes all. I may have to take it up to 325 to take this guy though, I outweigh him by 250 pounds bike and rider.
Gary

I don't have any yet becouse I have not done the powder coating and the chrome. I have some video's on utube of it running it is under bombusa. My bike in stock form is about in the middle of the alchohol banshee's I can beat most of them but when I line up with the stretched ridged bikes they beat me almost every time I still need to upgrade my tires to 14 or 16 paddle tires so I can get this pig moving quicker. Good luck with your race 325 sounds great I would love to ride that:0)

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2004 DS 650 under construction being transformed into a DS 1300 Bombusa.
2001 Raptor 660
2006 Yamaha Rhino special edition
Ride Hard Die Fast
I came into this world bloody and screaming that's the way I want to leave.

PHALCOR:
Being a Ds man myself are you sure that is not an early 09 model (LOL) since we are getting use to all that usual double over head cam cylinder stuff.

I have one question?
Where does the oxyigen system hook-up for your helmit, I'm sure going through the gears you would not be able to breath regular air. Does it ever suck your eye balls into the back of your head going through third gear.

Really? That is sick power and totally uncalled for, and dangerious for other riders to be around and you have to love that. (WOW)

PM me a picture so I can download that and save it as wallpaper Please. Holly DS batman who is going to save man kind?

Garman