dirtrocks said:i know 4 stroke will outlast a 2-stroke...
that part i said about the 4-stroke was about snowmobiles, if you had read i said i bought a 4 over a 2 for snowmobiles becuase the 2's in some of the snowmibles are haveing problemsMasterphil said:Whatever you say, boss.
The time interval between rebuilds is shorter for a 2-stroke, but they are much cheaper. If you read the article at the top of the page, you will read how the most reliable 250f, the yamaha, generates about a $20/hr maint. cost when ridden by an intermediate. If you are talking a 125 expertly ridden, then do the rings at 5 hrs and the piston at 10hrs. Let's add up 20 hrs of time. Two piston kits $80. Two spare rings 24. Two gasket kits 40. Two spare base gaskets for ring changes 8. A wrist pin bearing every other piston 12. Let's say you need a new set of reeds every other piston as well, 50. Add them up, and you get a $10.70/hr of runtime. Half the cost of a 250f. Hell, let's say that you also burn up a clutch each piston as well, that's another 75 each for an ebc. That's an 18.20/hr runtime cost. The runtime cost for the 250f does not include clutches. It would take a rather abusive 125 rider to go through that much stuff in only 20 hours of ride time, though.
Oh, I forgot to leave out one minor problem with all of that. Those service intervals for the 250F are twice what yamaha reccomends and are for intermediate riders. The intervals for the 125 are considering an expertly ridden bike. Oops
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