How much to rebuild engine?

[Riding LockedDown]

Hey all,
was just wondering how much it would cost to rebuild the engine on a 450 or 250?

As an example a cr250, or a crf450r?

Sorry for a noobish question but buying my first dirt bike and just need to know rebuild costs?

cheers

[YellowDog]

How long's a piece of string?

If the engine needs a rebuild, then there will usally be a reason for this. The rebuild costs will be deopendent upon the required remedial work.

If yo are able to dissassemble the engine yourself and take the bock for a rebore and the head of a skim etc etc. then you can save a lot of money.

Get yourself a torque wrench.

[Riding LockedDown]

can service myself, needa get a tension wrench again though. but aint got the know how for an engine rebuild I think. Maybe I'll get me some instructions and hit the trial and error haha.

[YellowDog]

Get yourself a workshop maniual.

You will be surprised how much you can actually do yourself.

[cheese]

If you rebuild say a top end yourself, a CR v CRF is pretty much the same. If you went to a shop to get a CR v CRF, very different story. I priced it out with many shops before I got my CR and it was $350 for a CR and between $700 - $1000 for a 4 stroke.

[Rupe]

If you rebuild say a top end yourself, a CR v CRF is pretty much the same. If you went to a shop to get a CR v CRF, very different story. I priced it out with many shops before I got my CR and it was $350 for a CR and between $700 - $1000 for a 4 stroke.

But both are easy to do at home yourself if you have the manual, which I think he wants to do. You can download mauals on the net, thats what
I do.

[oldskool]

But both are easy to do at home yourself if you have the manual, which I think he wants to do. You can download mauals on the net, thats what
I do.

Ask Hemi, he's the man ual pimp

[Riding LockedDown]

Yeah think I'll give it a whirl myself. gonna find a manual now. cheers

[notch]

In my opinion a 2T is much cheaper to repair, both in parts and labor. It really does depend on what goes wrong, but there are more parts to go wrong on a 4T. The 4T last longer between rebuilds, but this is not true for high performance (high revving) smaller capacity four strokes.

Ive had two bikes really go bang (this was a while ago, so it's probably more $$ now):

KTM 2T Parts (didn't like sand in the engine for some reason):
$350 piston & rings (this is more than average for a 2T)
$200 Crank
$80 Crank rebuilding
$150 Crank bearings
$50 Gaskets
~$1k

Honda XR600 Parts (it was a lemon!):
$400 Piston & Rings
$400 Valves
$250 Valve Seats & machining
$500 Crank (excluding rebuilding)
$100 CamChain
$100 Gaskets
$150 bearings
~$2k+

If you bought a 4T or 2T brand new and kept it, you would probably spend the same money on repairing at 2T and a 4T over a long period of time (excluding the aforementioned high revving 4T's).

But if you are buying second hand, it can cost you a significant portion of the purchase price to fix a lemon 4T.

One of the least maintenance & robust bikes are the high capacity 2T engines, as they don't rev and much as their smaller capacity cousins, and can go longer (>150 hours) before a rebuild is needed.

[Rupe]

In my opinion a 2T is much cheaper to repair, both in parts and labor. It really does depend on what goes wrong, but there are more parts to go wrong on a 4T. The 4T last longer between rebuilds, but this is not true for high performance (high revving) smaller capacity four strokes.

Ive had two bikes really go bang (this was a while ago, so it's probably more $$ now):

KTM 2T Parts (didn't like sand in the engine for some reason):
$350 piston & rings (this is more than average for a 2T)
$200 Crank
$80 Crank rebuilding
$150 Crank bearings
$50 Gaskets
~$1k

Honda XR600 Parts (it was a lemon!):
$400 Piston & Rings
$400 Valves
$250 Valve Seats & machining
$500 Crank (excluding rebuilding)
$100 CamChain
$100 Gaskets
$150 bearings
~$2k+

If you bought a 4T or 2T brand new and kept it, you would probably spend the same money on repairing at 2T and a 4T over a long period of time (excluding the aforementioned high revving 4T's).

But if you are buying second hand, it can cost you a significant portion of the purchase price to fix a lemon 4T.

One of the least maintenance & robust bikes are the high capacity 2T engines, as they don't rev and much as their smaller capacity cousins, and can go longer (>150 hours) before a rebuild is needed.

You're comparring two very different mschines there, hopefully the guy won't buy a xr600 for the bush!!

Think he was looking at an early yzf so would be around $300, and a yz would be around 250 for parts to do a top end. With proper maintenace there shouldn't be much difference in maintenace coats.

However if you have a seize on a four stroke it will be quite a bit more to fix than a two stroke, worth noting!

[Motoxparts]

Hey guys if you want great prices on 2 & 4 stroke parts have a look at www.motoxparts.co.nz
4 stroke single cylinders are very easy to rebuild alot of people talk it up so they get the work its only a single cylinder engine does not take alot of brain power if you take your time and look and take note of how it comes apart just put ot together the same, we own a full engine performance machine shop, boring hone machines, engine dyno, camshaft pro-file machine, cylinder head flow bench porting etc and a building performance race boat motors, rally racing motors, V8 super car motors etc, a single cylinder is very easy to put together if you need any help just call we are here to help we help out mechanics every day.

www.motoxparts.co.nz
06 8749595

[Riding LockedDown]

the two strokes sound a bit cheaper then. so they sound good to me haha.

I'm sure I'll figure out how to rebuild the engines myself. Just gotta find a manual or something. Fuck paying the shops to do a job I can learn to do myself!