rc46 wrote:i asked at the time if anything could have fallen in to the crank!! and could they check... when you pay someone to do the job and then you ask them to check it all you expect the job to be done right, im calling him tomorow as i i think its only fair he redo the work!!!!!! FREEEEEEEE

Firstly I'm not guaranteed to be right, it could be something else, but if it was bad setup that's their fault as well really unless you held it WOT in 6th for 5 miles.
A spun ring is a spun ring and they just happen, call it a design flaw if you like but most other failures are avoidable. Another one so soon is more than a little unlikely.

I agree in principle about the free work and if they were a reputable normal (i.e. road bike) engine builders and it was an engine they knew plenty about they probably would at least meet you part way.
However, BDK are 4 stroke race engine builders and not NSR specialists, if they were they'd have known the risk and certainly would have pointed out that the crank really needs to come out, Andy knew, he just chose to roll the dice.

A while ago the subject of taking NSRs to non specialists (so in the UK that means giving it to anyone other than Andy or Apex as far as I'm aware) was mentioned and it's caused pain to more than just you. The problem is even other "2 stroke specialists" are really just RGV specialists.
Monkey had his crank (on his first NSR, a really tidy 21r) done by a local dealer and very good friend, they got it rebuilt, it lasted a couple of thousand miles and never ran right still.
His bad experience and the fact Steve and Andy still had that bike to fix was the main reason I took mine to Apex and paid a lot (£1500 all in, but that was pretty much everything except a crank and includes £1000 of parts).

Really to be fair all the knowledge is here, on the forum.
Had you posted a pic with a missing bit of ring here and asked what to do, taking the crank out and Andy's experience would have been the first thing mentioned.
That's what's good about NSR-World, as individuals we've done bits and bobs, but as a whole we've seized and rebuilt (and had fail again straight away sometimes) dozens (if not hundreds) of engines. There's nothing we've not seen, done, cocked up, destroyed, replaced needlessly or bodged in some other way.
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Please do not PM me technical questions, if you can't find it on the Forum start a thread