My dad and I just bought our first two stroke four wheeler and its a 1986 250r and it is pretty clean. My dad is being all protective of it and telling me not to top it out for a long time and dont race to see who has a faster top end. I was wondering if it will hurt the four wheeler to top it out, and because its old, will that have to do with ne thing about toping it out?

 

its a 2 stroke those things are made to run in the high rpm's

 

if ur not gonna run the hell out of it then why did he buy it? thats like buying a corvette to putt around in. running something hard has consequences but thats why we buy high performance machines. putting a new topend in a 250R costs about $150 and takes about 1 hour. if you blow it up... its not really that big of a deal.

 

It won't hurt it.......its just not good to run max rpms for a long long period of time.........if you just change rpm's every once in a while......you'll be fine........and like stated.......they are easy to rebuild......so who really cares??

 

D@mn right, run the hell out of it. It was built to race.

 

2 strokes tend to be more likely to seize if held at WOT. If you and your friends tend to drag on wide open stretches and hit top speeds, then I could see your dad's concern. It is a performance engine though, nothing wrong with opening her up and stretching her legs[img]i/expressions/face-icon-small-happy.gif[/img] As long as you aren't holding it at WOT for much more than 5 to 10 seconds, the engine will be fine. And yes, with age comes a higher probability something may break at any given time.

 

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A properly tuned/jetted motor can be held at WOT without any problems!!!!

 

So they aren't more likely to seize at WOT than a 4 stroke?

 

an average 2 stroke will fail more often than a thumper because they do require more maint. but a well tuned smoker will run just as long and just as hard as any 4 stroke. if you are running a 2stroke HARD then just shut it off it is much more likely to sieze. you need to take a minute or two to cruze around to cool the piston and bore a bit.

 

D@mn Right!