| Author |
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Dave Patterson
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, February 27, 2005 - 12:41 am: | 
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I just had the time of my life on my ATTEX. It ran for 2 and a half hours before breaking. Blew a chain from lack of oil. Just got it from a friend. This is a great new hobby. I need to put a bucket seat in it. Also, am I the only person with a pre 1970 ATTEX? Looked all over and cant find anny. Anny one know anything about the older exposed disk tranny? |
Don Kinyon
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, March 01, 2005 - 10:11 pm: |
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Hey, Dave;
Those old transmissions aren't bad if you treat them right. There are bearings that need to be greased occasionally, and the pucks will eventually wear out, but the tranny should last for years. I have two that are in machines now: one in a race machine that doesn't get used much (for now) and one in a project Attex that I haven't started on yet. Email me off board if you need any more information.
Don |
Dave Patterson
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, March 02, 2005 - 05:31 pm: |
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Thanks Don.
Have heard it both ways and dont want to risk blowing up a new trans. Ive also got to retract my statement on the older ATTEX machines. Looked around the site and found some. Does anyone know of any good places in Washington to ride. Dont have ORV tags or a title yet, so I need someplace to test and tune without having to worry about getting a ticket. |
Dave Patterson
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, March 06, 2005 - 02:06 pm: |
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I have decided that the 2 stroke runs too high of RPMs. going back to 4 stroke electric start. Ive also found that the axels like to shift, to be fixed with locking collars. |
hydro_mike (Unregistered Guest)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, March 07, 2005 - 12:09 pm: |
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Hi Dave,
A two-stroke isn't for everyone, but don't be discouraged if you're having problems with your machine. An equivalent 4-stroke is probably much quieter, more fuel efficient, and some claim that they're more easily maintained. It all depends on what you're looking to get out of a machine. Some two stroke engines are misunderstood, mistuned, and subsequently maligned for how they perform. Depending on when your primary clutch engages, a two-stroke single (or twin in your machine?) can push your machine around just fine at low RPM, and with the right exhaust, be nice and quiet. The advantage of having those RPMs when you want them, however, is priceless. :o)
Reliability is also a function of how the engine is initially set-up, maintained and understood. There's a reason so many ultralight aircraft pilots trust their lives with two strokes (Cuyuna/Rockwell, Rotax, Hirth, etc,etc). I adore my two-stroke twins, and won't trade them for anything. Four stroke technology has come a LONG way, however, and may soon prove to be more versatile. (4 stroke turbo snowmobiles? Gheesh!)
Good luck with a conversion, regardless. Post some pics of your machine. I'd love to see it!
~mike |
Dave Patterson
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, March 07, 2005 - 07:48 pm: |
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Thank you for your encouragement Mike
Don't get me wrong. It's fun to go 50+ on 6 wheels. But Ive found that I like the technical riding is more to my liking. I also have virtually NO experience with two stroke engines, where I have alot with four stroke. Fuel efficiency and maint. are issues. The engine itself is a Yamaha 440cc twin. Single carb and 2 to 1 exaust. My biggest problem is the exaust. Went thru the stock ATTEX muffler till it fell off. Now it won't open up and its chocking on its own fumes. I want to make my own expansion chamber but what design will yield lower rpm power? Goes around fine, takes about 1/4 throttle to go. Mind you its an OLD machine so metal fatigue is a big problem. Especially when it hits the power band. But all things considered, mixing fuel, noise, speed maint, big wipeouts, I want it to be more user friendly. I can alwayse keep the 2 stroke and run clutches to a quad rear end and make a minni sandrail, no?
"Crazy" Dave Patterson |
mike cummings (Unregistered Guest)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, March 11, 2005 - 04:39 pm: |
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Crazy Dave P.,
What model machine do you have? If it's an old 297 or 300D, the mufflers were relatively small, but have enough capacity to handle the exhaust from that engine. If the machine lived outside (or inside, for that matter) the mufflers have a tendency to become living quarters for mice, chipmunks, etc. I've had quite a few mufflers in my short experiences that have been chock-full 'o acorns, insulation, grass, moss. My 503 Rotax breathes VERY nicely through the stock attex muffler, though. Check out:
That's a 32 year old machine with a 25 year old engine. I've had a bit of experience with an Argo Bigfoot with tracks in the mud/swamp/snow of winter in Western NY too. My Attex would have been useless. That Argo was just like a tractor out in the woods, crawling over logs with low range, etc. Amazing machine! While I'm still somewhat young, I will gladly trade that for 52hp, 45mph, and smelling like a refinery. It makes me smile. For expansion chamber design and theory, check out: http://www-staff.lboro.ac.uk/~elvpc/progs/expch.html
- very in depth. Time to buy some sheet metal!
~mike |
Dave Patterson
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, March 11, 2005 - 07:37 pm: |
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Mike
Im 23 and am so happy that my buddy sold me this thing. Its an extremely fun hobby. I Love the smell of my expensive oil burnin off. And after researching my problems. I think that I will keep the 2 stroke! I will reattach the stock muffler more perminantly. Thanks for the info, it made me realize that the exaust leak that eventually removed the muffler was also the reason it was runnin crappy. The exaust has been leaking there for a little while.(had chains to deal with) I also am going to run an intake tube into the body for cleaner air. I will get retaining locking rings to keep the axles inplace. I have ordered all the bearings and seals for the axles, and have replaced the axle and hub pins with bolts and nylocker nuts. That removed alot of slack! And because I LOVE doing brodies(especialy in the ATTEX) I am going to need tires. I was thinking of doing a golf cart wheel conversion because there is a golf cart wrecking yard down the street. You can get all the tires for them too.
Back to the fab shop for mee!
"Crazy" Dave Patterson |
Dave Patterson
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, March 11, 2005 - 07:43 pm: |
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ST/300/D |
Anonymous
Posted From: 209.195.190.203
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, July 04, 2006 - 09:01 pm: |
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To who it may concern,
My name is Becky I am 13 years old and my pap is giving me an old attex. i think it is a 1969 but i am not 100% sure it is in pretty bad shape but am planning on fixing it up real nice. I was wondering if you could tell me where i could find bucket seats to fit it do you need a special type? Also how do you instal them?
Thanks for your time i would greatly appreaciate any info you have!!!
Becky (PA) |
Mike Cummings
Member
Username: Hydromike
Post Number: 20
Registered: 03-2005
Posted From: 141.149.254.227
Rating: 
Votes: 1 (Vote!) | | Posted on Wednesday, July 05, 2006 - 09:08 am: |
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Hi Becky...
It sounds like you're already on the right track with your Attex project. Installing a bucket seat into an Attex isn't too hard; it just requires a little fabricating to make a seat mount. I've installed two seats in two very different Attexes, and each one called for a different mounting setup. The bucket seats that I've used are the high-back bucket seats found at Summit Racing, Jegs, or just about any automotive supply store (they always have catalogs you can look through...) The bucket seats run about 35-40 dollars if I remember right. You can always check E-bay too (search for poly-seat, racing-seat, etc.). A 3-point harness and a roll cage are fun too, but take a little more fabricating effort. But once they're done, you can drive however you want too.... :o).
The bottoms of the bucket seats I've used are completely flat, with 6 mounting bolts. I just made a bracket for each one that bolts to the frame, then the seat bolts to it. I can e-mail you some decent pictures of the two machines if you'd like.
~mike |
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