250 four rebuilds.

[Mr. Peanut]

Have any of you chaps quoted the cost, or gone through the process of rebuilding a CBR/ZXR/FZR/GSXR 250 engine?

Anyone able to give me a realistic idea of the cost?

Im guessing it aint purty

[James Deuce]

I think they usually get written off before it's an issue. Such is the life of a 250cc multi-cylinder motorcycle in NZ.

[vtec]

I've got a good spare engine sitting at home at the moment. Just got it as a spare for my race bike (MC22). But might put it on a kart, or sell it at the end of my CBR250 tenure (end of this year).

[N4CR]

What the fuck have you done to it for it to need rebuilding??!?

edit: I can't think of anyone that has done one before... they usually don't need or don't last to get them.

[HDTboy]

It depends on how much work you do yourself, the parts are around the same price as car engine parts, if you ring the dealer for the bike concerned you could pester the parts guy into giving you prices on all the bits.

The question is why would you? They rarely break down, and if one were to throw a rod (for example) you'd be better off buying a 2nd hand one

[N4CR]

Ahh I know why.. he's used to riding stupid friggen two strokes. Honda ones too

n00b.

[imdying]

Have any of you chaps quoted the cost, or gone through the process of rebuilding a CBR/ZXR/FZR/GSXR 250 engine?

Anyone able to give me a realistic idea of the cost?

Im guessing it aint purty

No, it isn't pretty. As has been alluded to, they normally keep running so people don't need to bother . ZXRs seem to be the worst for needing rebuilds though. Mostly it's only the heads, the bottom ends last for age (no real power up top, so no real need to screw them I guess, plus most people have some level of mechanical sympathy and have a hard time getting their head around 17000rpm != bad screwage).

Anyway, typically the heads get a little tired, but they're not too bad to do. Depending on if the valves or seats are rooted, you can typically get away with a top end build for a $1000, including all the crap like oil, coolant, filters etc. If it's not too tired, you can even do it for less It's arguably worth looking at one that's over 40000kms, crappy valve sealing can drag what power they have down fairly easily, and the tiny little valve seats can be sensitive to having been abused. Having said that, if you got it 20000km, and didn't screw it, you wouldn't have much reason to check the heads out till well over 60000kms...

It really depends on the level of abuse it's had... a clean/well maintained one should go forever with no work at all. One of the benefits of such a linear (boring) torque curve is the lack of reward from screwing it, and its really only screwing them that shags em

[texmo]

I've got a good spare engine sitting at home at the moment. Just got it as a spare for my race bike (MC22). But might put it on a kart, or sell it at the end of my CBR250 tenure (end of this year).

What are you gonna race next year? Sv650 or zxr400?

[Mr. Peanut]

Tanks for teh info ^_^ a friend of mine is looking at buying a CBR and wanted to know.

You must spread some Reputation around before giving it to imdying again.

[imdying]

Tanks for teh info ^_^ a friend of mine is looking at buying a CBR and wanted to know.

Just get him to ride a few (or if he's a noob, do it for him) different bikes before he lays some money down. As the others say, the screwed ones are pretty easy to spot

[vtec]

What are you gonna race next year? Sv650 or zxr400?

Planning on jumping straight to supersports (600's). Just looking at a few options at the moment. Crash damaged bikes from the auctions to fix up for racing, or maybe one of last years bikes. Just got to save up real hard.