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Hi.im wayne from coventry.i have a 2004 5vy r1 which is it bits at the moment due to con rod bearing faliure!! has scored crankshaft! full service history with only 10000 miles!oil pump is fine so not sure what has caused this?im in to minds whether to get a engine or new crankshaft?any suggestions would be appreciated or if any one knows where i can get either of these in the uk?thanks

Welcome in Wayne, sorry to hear about the engine. I would want to know exactly what has caused the issue before rebuilding the mota, if that is not possible then replace with a guaranteed unit

Welcome Wayne.
Only 10,000mls and its done a main bearing? Bloody odd that.
You better do some serious searching for the cause mate before simply dropping in another bearing.

Be interested to know which big end bearing

TLS_Russ wrote:Be interested to know which big end bearing

You need a hobby :lol:

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Luke03R1 wrote:

TLS_Russ wrote:Be interested to know which big end bearing

You need a hobby :lol:

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Maybe I should plan an invasion of Scotland

Welcome in Wayne
Sorry to hear your problems , hope you get it sorted

10k miles is not high mileage, like others have said you need to find out what caused it.

Hi Wayne and welcome to the forum mate

Hi mate welcome

Welcome in Wayne

Welcome to the forum Wayne


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My guess would be oil starvation, main bearings rarely let go if there running in oil, youd be amazed how little time it takes to do a main bearing with no oil around it, anybody who ran the first 4 stroke KTM single cylinder road and motox bikes and pulled a wheelie lasting longer than 20 seconds found out the hard way lol, Captain had a 5VY go bang and all, imtrying to remember the cause, he is a member on here maybe you could contact him via pm , he don't come on very often, im sure his was a main bearing failure as well. I cant be sure though, its a while ago , good luck mate. My tip would be tae buy a track bike, they tend tae be well cheap the now, whip the engine out fit in yours, then split the rest off the bike on ebay , probably wont lose out too bad that way. Least you can hear the engine running before you part with your cash.

or always buy this
http://www.ebay.co.uk/itm/yamaha-r1-eng ... 2a3458994b" onclick="window.open(this.href);return false;

or this
http://www.ebay.co.uk/itm/Yamaha-YZFR1- ... 58a688250b" onclick="window.open(this.href);return false;

You could if you fancy a bit of a winter project fit a 4C8 engine and associated wiring, its been done before

Hi.ive just got a power commander for my 5vy r1.ive got race baffles,decat,k&n air filter.do's any one no the right map setting for this i car,nt find it any were many thanks wayne from coventry

There is / was one as I had same map until I had custom one done on dyno. Think its akrapovic decat and k&n but I may be wrong. Wasn't a bad map tbf , bit rich but ok. Custom map will get you 6 ish hp more mind with that set up.

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Glad you got the bike sorted in the end , did you ever find out why it starved the bearing ?
just had my oil pump fail on my 4xv & Geof who's doing the work say's in all his time of racing & being a mechanic he's never seen an engine get so hot that not only has it warped the crank but written off the gearbox & new clutch too , the crank is now brown & there is a stain across the crank case's where the bikes been on its stand & the boiling oil has found it's level

Donny wrote:My guess would be oil starvation, main bearings rarely let go if there running in oil, youd be amazed how little time it takes to do a main bearing with no oil around it, anybody who ran the first 4 stroke KTM single cylinder road and motox bikes and pulled a wheelie lasting longer than 20 seconds found out the hard way lol,

thanks for warning me 6 years ago lol

Thanks i just seen one that sound right for my set up .i never did find out what caused the bearing to go??i got a engine of ebay used crankshaft and oil pump then rebuilt my engine new bearing piston ring full job long hours and bit of a ballacke but got there in the end lol.ran it in for the 1000 miles and running fine ive decided to decat it due to getting hot very quick all the time !!hope you get ur bike sort m8 not cheap tho i bet thanks

wrgr1 wrote:Thanks i just seen one that sound right for my set up .i never did find out what caused the bearing to go??i got a engine of ebay used crankshaft and oil pump then rebuilt my engine new bearing piston ring full job long hours and bit of a ballacke but got there in the end lol.ran it in for the 1000 miles and running fine ive decided to decat it due to getting hot very quick all the time !!hope you get ur bike sort m8 not cheap tho i bet thanks

found a donor bike with engine from a new forum member that did me a stonking deal , you seen how much a brand new crank is ?

O yes not cheap!!!!

welcome in Wain, sorry to hear the bike is dead fella, sounds odd for such a major failure.

I for 1 would be interested to find out what the cause was.

Does super lube help in the event of low or starving oil? if so how long would it help for

Hi all.i decated my 5vy r1and it pissin fuel in the exhaust?took it 4 a dyno run and he recond it could be the injectors or the valve stem rubbers???it was running fine be4 i decated it and put a power commander on any idea's thanks wayne

thats sh!t mate , hope you get it sorted

Its gettin right on my tits m8 just want it sorted.lol power commander has mest it all up how u gettin on with ur's?