motor rebuild cost

[bodydropcbr6]

whats a motor rebuild on a yz 250 goin to cost i need a parts cost and a seperate shop cost

[Krazy Hawaiian]

You talkin a 2 stroke or a 4 stroker?

Depending on the amount of wear the cost will go up and require more parts.

A 2 stroke usually needs a piston, wrist pin bearing rings and sometimes crankseals and in extreme cases crank bearings. The labor is cheaper due to the simple engine design.

A 4 stroke labor cost is higher from engine complexity. They can also involve valve guides and seals along with the piston and wrist pin bearing.

I saw a artical in Transworld motocross comparing the cost of racing a 2 stroke vs a 4 stroke and suprisingly the cost of the 4 stroke was significantly higher than the 2 stroke. I've searched the site high and low and cant find the artical again. It was a good info read between the 2 designs. I would have said the 2 stroke would be higher but in there testing it was just the oppsite.

[bodydropcbr6]

im pretty sure it was a two stroke that the kid has and its a top end rebuild i looked at it tonight just havent had a chance to price anything out also im trying to see if i can make some money and get it in a shop or if i actually have to do the work to make money lol

[Hawker]

Originally Posted by Krazy Hawaiian

I saw a artical in Transworld motocross comparing the cost of racing a 2 stroke vs a 4 stroke and suprisingly the cost of the 4 stroke was significantly higher than the 2 stroke. I've searched the site high and low and cant find the artical again. It was a good info read between the 2 designs. I would have said the 2 stroke would be higher but in there testing it was just the oppsite.

I find it hard to belive to. Having both.

[Krazy Hawaiian]

^^^^ I bet ya dont ride like the transworld doods tho.... there all Nat Champs Ryan Hughes RC ect....

The 250 kwaker 2 strokers top end was fine. only needed 2 chains and tires in a season. Therre talkin wear items not crashables.

Dam I sure wish I saved that article.... I always save interesting stuff... musta been hip deep in pr0n that day....

[Josh D]

If it's a YZ250 top end, it should be approx:

$77 for piston kit

$24 for gasket kit

$13 for wristpin bearing

Might as well throw in a new plug, change coolant, and bottom end oil.

If you have your own basic tools and a shop manual, you should be able to do a top end on a 2 stroke by yourself or with a friend. Only reason to have a shop do it is if you have no place to work on it, just don't give a shit, or like to throw your money away.

OTOH, for a YZ250F, from the same place the above prices came from:

A valve shim kit is over $80.

Piston kit is $110+

With the 4 stroke, you have valves, cams, chain, etc., which you do not have on a 2 stroke.

If you really want to know the difference, call the shop and ask them to give you prices on a complete top end rebuild of whatever year YZ250 and YZ250F. I'm sure the prices will vary, but a friend of mine who had a 04' CRF250 told me what a rebuild would run on his bike, lets just say I could put about 5 top ends in my 2 stroke for what it would cost him to have the shop do his bike once.

Also, he had his valves checked 3 times, not sure if they were ever shimmed or needed to be. He sold his bike and got a brand new 450. That would be a nightmare to me, paying a bundle for a used 4 stroke "F" bike, and finding out that it needed a rebuild.

[Krazy Hawaiian]

shimming valves is a bitch. Not to mention the screwzookie dealer wont sell ya the $10 a piece asprin sized pills.... pricks. I used to get Quaaludes cheaper n that


Ya the big cost cutter in 2 strokes these days is the nickasil or chromed culinders. The ultra hard surface lasts forever nearly unless yo u suck a small animal in the intake.... Kat fur messes the ring sealing abilitys uo .... always have a good ar cleaner in place amd securly mounted to avoid small animal indegestion