dirt bike question

dont by a four stroke unless its a yamaha. they are the most problem free bikes you can buy. I have a trx450 honda quad and a yz 250 bike. the good thing for me is that I grew up with one of the guy from Metal Milisha and if I need work done I get it done by factory mechs. four stroke are very expensive to fix if you have engine issues and you will. you have to replace shimes and valves about every six months to a year and it gets expensive. Also if your blow your crake or bearings your going to be out about 500 in parts and 1000 in labor. two stroke top end are about 150 and take only a half hour to change out if you ever blow your engine in a two stroke you can get a new one for about 600 bucks, two stroke are way more punchy and can bogg out but if you know how to ride a bike you can work it, I trail ride my two stroke and dont have issues.

 

This is exaggerated for the average rider. Pro riders and those that push the limits of their bike are going to need adjusted more often. The 'weekend warrier' or hobby trail rider can go years without adjusting valves. I ran 60 hours on my CRF250r without adjusting anything. I also went over 200 hours before replacing the top end.

I do agree that 2 strokes are the way to go. I rebuilt the top end on my CRF and it cost $600 in parts (I did the labor myself and it is not easy). A shop quoted me $1050 for new valves, piston and rings - installed.

My 200exc (2stroke) needs a new top end. I'm looking at $120 in parts and the work is much easier / less complicated.