Hi all recently done a bottom end on my bike it's pretty cooked but runs still, Iv bin told it will cost more to get it running then what I payed for it,, and also Iv bin told there is an interest for them so I mite be better to sell it as is, helps appreciated
Looks in good nick. Unfortunate that it's cooked. Did it do a rod bearing? Depending on which way you go it can be an expensive or not so expensive repair... If you take it to a shop and tell them to fix it, expect a large bill. But you will have warranty on their work if it blows up again. The other way is to do it yourself... get the engine out, find what's stuffed in the bottom end and price up parts... try to use ebay or yahoo auctions japan (accessed by thirdparty services like buyee, jauce, etc) for new old stock over aussie dealers, unless their prices fair and the parts are in stock. You can also order parts brand new from Japan, but the prices are still fairly high, if the parts are available. The damage will dictate what can be repaired/cleaned up and what needs to be replaced. I'd start by getting the parts schematics and service manual. Earlier/Newer models may have the same part number for crank/rods, in which case you have more options for fixing the engine. I had an FZR250 with a stuffed rod bearing on cyl #3. Some mechanical genius had installed the rod backwards (Yamaha rods have a Y / diamond shape cast into them, which faces the left side of the engine, this one was facing right) and the rod cap the right way, and it had spun the bearing. So the crank surface was bad and the rod was toast. I transplated a good crank and rod set from a spare engine into it, with new main bearings, and a brand new complete clutch. It was like a brand new bike.
Looks cool but bottom end is a big job, tearing the whole engine down etc. If you're up for the challenge go for it, but make sure you can actually get the parts first and meet the budget of acquiring them before you go any further. Otherwise part it out - if it's rare you'll probably find a demand for it and make at least some of your money back.
I think you can take the bottom half of the engine off to work on the crank without disturbing the top. Need to know what happened to it first.
Agree .... and also who gave the "diagnosis" .... needs to be assessed correctly before anything is done
That is right thanks man I haven't done much work on bikes before but yeah I would like to ,and learning to replace crank should be challenging enough
T Cheers yeah finding the service manuals my best bet if I was to personally repair it ,because yeah 2000 is to much for a repair and I am keeping an eye out for parts right now so yeah have had some luck but yeah I'm not buying until diagnosed.
Cooked coming back from a fairly long ride were I pushed it to the limits and on way back it died gear lever shook and yeah definitely a bearing clearly by the sound of it pulled over due to losing revs and yeah checked oil and smoke coming out of it so yeah got a ride home with it and a mechanic told me pretty much that ,, careless by me
Sounds more like you've cooked it and the rings have gone... better news than the bottom end. Do a compression test to check. Any rattling noises are probably piston slap because the rings have lost their spring. I reckon they'd go first in an overheated scenario before the bottom end would.
