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Yamaha Tech Originally the Yamaha XT600 Tech Forum, due to demand it now includes all Yamaha's technical / mechanical / repair / preparation questions.
Contact Overland Solutions for all your custom modifications and setup for overland travel.

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  #1  
Old 13 Jun 2005
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Location: london,england
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5th gear

am thinking of buying a 86 ten and the owner says the 5th gear is on its way. what exactly is it that goes wrong and how easy/expensive is it to fix. the bikes done 65000 (miles i think). ta for any help
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  #2  
Old 14 Jun 2005
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Its basically the engine pumps out too much torque for the gearbox to handle. Heavy accelerating and de-accelerating in 5th gear cause wear to the cog. As you know the bike uses a dry sump system and this enables the small metal partials to work there way around your engine, causing additional damage.

I've been quoted £650 plus parts, to have my engine rebuilt using a upgraded kit. This was from a leading Overland specialist in West Sussex England. This didn't include any additional parts that may be required like oil pump etc and suggested a figure more like £1000 plus vat.

It would be interesting to see what a Yamaha garage would charge, or if your handy with the spanners.... another option and the route I'll take it look at fitting another engine, I think the TDM 850 fits.

I was sure my box was shot, but it turned out to be a worn rear sprocket on the back wheel. Started to have oval indents and made hell of a noise.

If you buying cheap and have the work done, then you're sure before you leave on a big trip.

I hope it helps....
Cheers
Matt
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Old 15 Jun 2005
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£650 plus parts! If thats the man I think it is (named after a certain South London borough?), his prices get more ridiculous by the day. I had my engine rebuilt for a fraction of that by a good local mechanic, including parts.
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  #4  
Old 29 Jun 2005
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Do it yourself..!
Be very carefull when remounting crankshaft in case, not to hurt its bearings.
Keep engine clean, use a very little liquid gasket, be sure not to get it in oil circuits.
Use bearing glue of strongest kind to place bearing on crank and also in case.
I´d recomend to put a 3AJ oilpump...

Good luck and enjoy,

Mattias
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