i know this sounds a stupid question but it is still a possibility as to why my bike seized, my bike was started with no choke and left to idle for 6/7 mins before i done a slow 3 miles ad was 5/6000 rpm 6mph 5th gear when it went, i couldnt of ridden it much slower, how do you warm your bikes up before use,
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NSR250 MC18

that would of been fine mate. I always get the temp guage registering a good reading before i move off and generally clear the exhausts. it takes me a few mins to get anywhere where i can open her up so that serves as a good warm up to

To be fair, I'd love to say I warm it up carefully, but it'd be a lie. I don't nail it from cold but it gets 5-6000 rpm within 60 seconds of firing up.
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Please do not PM me technical questions, if you can't find it on the Forum start a thread

There's nothing wrong with a little RPM as long as it's not under undue load.

A motor will warm up to normal operating temperature quicker if it's used (i.e. ridden) lightly after a minute or so. (Generally the time it takes to put a jacket, your lid, and a pair of gloves on.)
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Andy.
NSR-WORLD.COM

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well that has set my mind at ease i did think it was warm enough but as have never had one before i wasnt sure,its the same way i warm up cr 250/cr 500 and never ever had a problem with those,thanks to all
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NSR250 MC18