Engine Overhaul Parts or New Engine

[YellowCat]

The ball bearing on the transmission exit shaft on my engine is destructed
To replace it I have to open up the entire engine and probably do at least a partial overhaul. This is a '97 Yamaha YZF600R and the engine has 105K km on it (66K miles).

Can anyone recommend a good, not expensive, place to purchase overhaul parts - gasket kits, piston rings, bearings, etc.? Aftermarket part would do just fine.

Also, I am considering the option to buy a complete used engine. Can anyone recommend a reliable place for buying an engine?

Thanks.

[ZRX61]

Piston rings?? why are you even taking the top end apart to change a bearing in the gearbox??????????

[YellowCat]

[Guest]

What our friend is implying is that on a lot of engines you can split the crankcases and access the gear shafts without disturbing the top end. I don't know if this is the case with your engine, you'd need to carefully study a workshop manual.

You need to remove everything from the sides of the cases, including the clutch drum, as there is sometimes a plate or bearing retainer behind the clutch that is bolted across both case halves. This is easier to do if the engine is still in the frame.

Then remove the engine unit, turn it upside down and remove all the case bolts and the bottom half should come away, leaving the crank and gearshafts in place in the top half.

Again, it's a case of RTFM ro make sure you've got everything off (including any hidden case bolts) before trying to part the cases.

At 60k miles, if the engine hasn't had a hard life and has had regular oil changes, I wouldn't expect any serious problems in the top end so you mayas well leave it be.

[Guest]

Ah, simultaneous post and you obviously have RTFM

[Danny]

I've just bought a 2nd hand engine from a breakers in Dorset: 01202489680. I haven’t had it delivered yet so I can't say how reliable they are. But I can say I paid £375 where all other breakers wanted £500+ for a similar condition engine.

[sickpup]