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Who would you have overhaul your 2-stroke?

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Posted

With 6 years, some sitting time, and 350 hours SMOH on my 582 I'm thinking I need to start looking into tearing it down soon. If it wasn't for messing with the crank and bearings I'd just do it myself. Back when I was racing dirt bikes competitively I could put a top end in my 250 in a little over an hour. I've got some inquiries in with a few people and so far their prices are blowing my mind. There's no way in hell I'm paying 3 grand to rebuild this thing. I've seen crank prices all the way from $900 to $1400. Anyways curious who you guys have dealt with in the past and what you paid.

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Posted

if the crank is tight, put new seals in it and run the crap out of it.  If you really want to drop a new crank in it, call Tony at Twisted Metal Racing in Canada.  I got a crank from him for mine and I think it was 550 or 600 delivered to the frozen north.  If I remember right, that was including the 100 core deposit (it was 120 to ship it back so I just kept mine).  You may want to toss in a set of wrist pins and bearings also.  There is nothing to rebuilding these.  If you dont have the overhaul manual, let me know and I will get a copy to you.  I can also burn you a copy of a DVD called "deep inside your rotax 2 stroke" that will guide you through it.  No need to change out perfectly good pistons IMO, or the crank for that matter.  The rotax repair shop I talked to up here had 582 cranks with 15-1700 hrs on them.  They do a leak check on the engine every 150 hrs and run the shit out of them.

http://www.tmracing.ca/parts/ShopParts.html

:beerchug:

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Posted

I have the DVD but not the paper manual. What is the proper procedure for a leak check on one of these? The CPS catalog has a procedure but it involves a bunch of custom stuff to plug the intake and exhaust ports. I guess I should invest in a compression tester and test the compression.

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Posted

The compression is not as big of a deal as the seals on the crank leaking... you loose compression and you power slowly...you loose a crank seal and you loose that cylinder when she goes lean and burns down.  A new set of seals off ebay will run you about 100 bucks and that includes all the gaskets.  I will check with Bob and see where he got his last set from as they were only about 50 bucks.  We have used these seals in 4 engines now that I have done with no issues.  One of the engines has about 150 hrs on it, mine has 75 hrs on it and I am not sure on Bobs engine, but I am going to guess around 50 hrs.

I just checked Tony's site and he has rebuilt cranks (same as we have in 2 engines here) for 450 plus 100 deposit.

I will try and get you out a copy of the rebuild manual when I get home, but I dont know if it will be in a week or 5 weeks... I may be doing a 6 week hitch this time.

:beerchug:

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