Having finally got my barrel and wossner piston checked for fit it's time to re-assemble. Should the new small end bearings be lubricated with anything before assembly and what are the correct barrel and head torque settings. Also I was told the fit was a good one but to run it in carefully, should my fuel mix be on the slightly rich side when doing this?

thanks

I think a little lubing with 2T oil is the order of the day, not sure about more oil in the premix but I'd think it would be a good idea, someone more knowledgable will no doubt be along shortly. Where'd you get the piston kit from?

You could richen the mixture, if you must, by carb adjustment but does anyone do this even with a new bike? I suspect not.

Just putting more oil in the petrol weakens the carburetion causing hotter running so it is not generally advised.

on all our new bikes we have bought we mix one tank of fuel 100cc to 5ltr petrol.put 2t on your small end and put 2t on your piston and rings.as for bolts we just tighten up till they are tight. cheers willie.

Having finally got my barrel and wossner piston checked for fit it's time to re-assemble. Should the new small end bearings be lubricated with anything before assembly and what are the correct barrel and head torque settings. Also I was told the fit was a good one but to run it in carefully, should my fuel mix be on the slightly rich side when doing this?

thanks

Cylinder head screws_ 8 to 10 ft lbs 11 to 14 Nm

Cylinder nut__________18 to 20 ft lbs 25 to 27 Nm

I usually tighten the head capscrews by hand as most

torque wrenches don't read well at those low settings.

The trick is to heat cycle the engine (riding sessions)

a couple of times and re-torque the head fasteners. They use

copper washers to seal coolant so they will compress a little

at first and this will avoid o-ring leakage in the future.

Jon

I think a little lubing with 2T oil is the order of the day, not sure about more oil in the premix but I'd think it would be a good idea, someone more knowledgable will no doubt be along shortly. Where'd you get the piston kit from?

Hi

Piston kit from Ebay,

http://cgi.ebay.co.uk/Wossner-Piston-Gas-Gas-TXT250-01-09-Sale-Price-/380297828362?pt=UK_Motorcycle_Parts&hash=item588b84580a

they have three sizes and I got the largest 72.49 which was pefect for my 2003.

Cylinder head screws_ 8 to 10 ft lbs 11 to 14 Nm

Cylinder nut__________18 to 20 ft lbs 25 to 27 Nm

I usually tighten the head capscrews by hand as most

torque wrenches don't read well at those low settings.

The trick is to heat cycle the engine (riding sessions)

a couple of times and re-torque the head fasteners. They use

copper washers to seal coolant so they will compress a little

at first and this will avoid o-ring leakage in the future.

Jon

Cylinder head screws_ 8 to 10 ft lbs 11 to 14 Nm

Cylinder nut__________18 to 20 ft lbs 25 to 27 Nm

I usually tighten the head capscrews by hand as most

torque wrenches don't read well at those low settings.

The trick is to heat cycle the engine (riding sessions)

a couple of times and re-torque the head fasteners. They use

copper washers to seal coolant so they will compress a little

at first and this will avoid o-ring leakage in the future.

Jon

Thanks for all the advise everyone