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Atk 604

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I'm looking for sources for Rotax 562 parts, 1991 ATK 604 chassis parts. I have a near new 1991 ATK 604 as my back-up thumper. Parts are hard to

locate.

Help PLEASE!

ATK604

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Motoexotica and Ron Wood racing are both excellent sources of Rotax engine parts.

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hello,

thanks for the reply re: my 1991 ATK 604. I am looking for 15 tooth counter

sprockets (who is the manufacturer?), the crimp washer for CS sprockets, a

kickstarter rubber.

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Brian,

Is there a source of info re: Rotax 562 engines? I have the Belgian/American

shop manual. The info is sparse. I am looking for technical data & history.

I am also looking for the MX fuel tank that was available for the 1991, ets.

ATK 604. I have the seat but not the tank. ATK Utah says they own the

tank molds & are not planning to make a production run. Any help on locating

an existing tank?

I have talked with Keith @ ADB, nice guy & helpful.

Are you familiar the the "Grimega" rear brake caliper that ATK used on the 604? The fron caliper is a "Brembo".

Any help is appreciated.

Thanks,

ATK 604

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The sprocket should be no problem:

They are the same on all Rotax fourstroke engines.

So check out any ATK/CCM/Aprilia/MuZ Importer/dealer in the States

Twin

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Try Sprocket Specialists. MXJunky had a '94 ATK350, and that's where he got his sprockets.

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Sprocket Specialists didn't make cs sprockets for the 1991 ATK 604...according to SS via e-mail 1 week back. Thanks for the help though.

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Thanks, I sent an inquiry to the address you enclosed. Appreciate you help.

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Hi! I own a dismounted ATK 604 ES 1991 bike. I would like to find service manuals or anything else could help me to rebuild this US wonder. Could you help me? I live in Italy. Thanks

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Please keep in mind that GRIMECA and BREMBO are both italian companies. I live in italy. If you need something, let me know.

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I have a 1991 1/2 (has 1992 rear fender, and now with ADB Keith's help, two 1992 side panels.....beautiful plastic, thick, high quality, even with heat resistant material stuck on the exhaust side), ATK 604 MX E/S. It has the MX tank/seat, but sorry I want to keep it although it crossed my mind to buy a mongo desert tank but then I'd need the seat too, and frankly, the MX seat/tank looks so cool I'm throwing practicality/range to the breeze and keeping it. I figure I'll just carry a jug on a little rack behind me, or a 'reserve' bottle on my handlebar to get my home at just over idle. I went 100 miles on the MX tank riding between Calgary and Jasper, Alberta, at 120 kph, so that's pretty good, although in the dirt you burn more.

I have the Salvador Moreali head, apparently, SM is carved in the head.....and it makes 60 hp at the rear wheel, it was the bike MX Action tested at that time, where it was racing against the CR 500, and out-accelerating it on the backstretch. I love the bike.

I thought my dealer in Vancouver, B.C. (I can find the name if you'd like, although I assume you're in the U.S......oh yah, its 'Kenco' but they may not deal in ATK anymore that was a few years ago when I last needed a part on this monster) sent me 'Sprocket Specialist' 50 tooth rear alum. sprocket. It was made in USA anyway, but I don't think it's very good, it's nowhere near a 'sawblade' and at least one tooth broke off, and I don't race or drive hard. But if Sprocket Specialists used to sell them, they may not anymore.

I was SERIOUSLY thinking of SideWinders, the Ti Alloy ones, or the new Tri Metal, for durability and light weight. I have a feeling, though, since noone has mentioned it, that they don't make sprockets for ATK's. Does anyone know? Hopefully they do, as I've heard nothing but good things about their sprockets.

I've never had a problem getting parts, Rotax engine parts are a bit expensive, but then the parts I got were roller rocker arm....which are high quality, and you get what you pay for. $170 CDN a few years ago for ONE rocker arm. $70 for a White Power rear shock eye. I re-did the head (10% lighter springs as the super-stiff stock ones, in the Moreali head, ended up snapping), and completely rebuilt the rear shock ($600 using WP rebuild kit and shop labour, which I thought was quite expensive), rebuilt WP forks (seals and oil only), replaced mag side seal that leaked and caused the galled rocker arm mentioned above, and all the cogs flew off the cam belt which stranded me. So I wouldn't say it's bullet-proof as I keep hearing (yes I use good oil, Motul semi-synthetic, and warm it up etc., and actually don't drive it very hard), the engine I mean, but I suppose one broken spring, a stripped valvetrain belt, and a leaking seal / galled rocker arm is not that bad for such a high performance engine. And a guy has to expect to change oil and replace seals / rebuild in suspension components periodically.

Good luck finding parts, although like I said you shouldn't need any, I've never had a problem.

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