www.YamahaR.co.uk

Hi. Anybody help. Ive just fitted a 4xv engine in my r1 . I bought this as reconditioned which i believe it has been. However i done 475 miles of low reving miles when it suddenly just stopped with a backfire and struggling power.

Seems like timing has moved on chain?

Is this possible?
Cheers

Welcome in Melvyn
Sorry to hear your bad luck , chances are if it's jumped a tooth it may have bent a valve
Did the rebuilt engine have a polished & ported head by any chance ?
It maybe worth buying a £7 endoscopy camera from Amazon and having a look down the plug holes at the tops of the pistons .
Hope you get it sorted cheap

Hi. It did have ported ported head apparantley! But its a shame you cant trust people anymore.

When you turn the engine over without plugs it sounds wrong. But no knocking came with it and i it will turn over with plenty of compression?

Thanks

I take it you bought the engine from eBay ? If so there's a guy that sells some pretty clean looking R1 engines on there that has come up in the past . The engines are slightly tuned and look like the cases have been cleaned up with a wire brush , apparently he doesn't build them too well and uses instant gasket rather than proper paper gaskets .
I'll see if i can find the thread

Hi. Yes i think you are right ... it doesnt have any gaskets. So his builds are sh!te you think?

I did buy from ebay . He has one on their now for sale. I did think it was suspect!

I should get in touch with him .
Here's all i could find
viewtopic.php?f=38&t=6801
viewtopic.php?f=39&t=9379

This one by any chance ?
http://www.ebay.co.uk/itm/YAMAHA-R1-ENG ... Sw1~JZPy7C

Yes it was this one. But it wasnt overly exspensive so dont see why hes had to make things hard. I paid him £1000 cash collected which running as it was is ok. But if i would of known it was poorly built i would of pulled it apart.

Hi thanks for sharing this.

This seems like the same spwc engine as i bought, but this doesnt mention any faults in the engine after finished project? Unless ime missing it?

Thanks for sharing.

98R1Wardy wrote:Hi thanks for sharing this.

This seems like the same spwc engine as i bought, but this doesnt mention any faults in the engine after finished project? Unless ime missing it?

Thanks for sharing.

In the second link buddy

TomR61 wrote:Went for a ride last Sunday and got a horrible noise from the gearbox just as I got home. Pretty scary given the speeds I had been doing just prior to this.

For that reason I am selling it as a spares or repair for the budget price of £1200. See full details below.

Ok. I am going to find him and get my money back. Fucking bastard just made a mistake.


Thanks for the heads up.