Hi folks, the dreaded has happened. Something amiss with engine, not related to other posts on crank nut or cam chain. CRANK related. I have been told by bike mechanic to look for a second hand engine as to expensive and got to send off crank to get balanced after. Should I split casings to see for myself or not, and if big end bearing related or conrod, does it need to be sent away or can a novice mechanic (me) perform such a task. .... any thoughts and tips appreciated. cheers cam. (xtx660 2009, 21000 miles) no history. DAM/REP.

I have had the same problem my big end bearing was in the way out I've decided to get the engine rebuilt because most if not second hand engines on eBay were older and had twice as much miles on them

Hope you get it sorted dude


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Anywhere near Great Barr? I can put you in contact with guys who will give you a second opinion if you take the bike or motor to them.

This one has only done 6000 miles and its �600 + delivery.

http://www.ebay.co.uk/itm/Yamaha-XT6...cAAOSw3YNXa~eD

I just went through the same ordeal but as it is my daily commuter I had no choice but to buy a worn looking engine with unknown mileage. I was lucky and got a good deal its been running sweet for the last few hundred miles I've had it fitted. I am still going to strip and rebuild the old one.

Why would you need to get the crank balanced if you replace with oem parts? I've not heard of this before.

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Now have a 2017 S1000XR Sport SE

2006 XT660X - Cat D write off due to someone pulling out on me - Pipewerx carbon fibre exhausts - Snorkel removed and airbox drilled - DNA stage 1 + 2 air filters - Kevs fuel controller mod - Scottoiler V system - Oxford heated grips - HEL braided brake hoses - Wilbers 540 rear shock - Brembo brake pads - AFAM chain and sprockets - Michelin Pilot Street Radial's - Denali DX Xtreme dual intensity spotlights

If you change the con rod, big end and crank pin, you split the crank, its not so much balancing as re aligning the two halves of crank