DT125R ARCHIVE

Grampian are sound...they know what they are doing and talking about. dont worry about the piston. they would have bored it to that-so dont bother messing about!

no need to check ring gap, they do all that as witnessed by myself twice when i sat and watched them repair my barrels! and i have got both jap and taiwanese kits -jap in my current running and taiwanese in my rebuilt motor

madrevs wrote:

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Thanks for the offer nev will keep it in mind and will check everything over before fitting just to be on the safe side.does anyone know about the inlet gasket I mentioned. Also can anyone confirm which way round the thermostat fits in as it can go in two ways it will either fit in the thermostat housing or the cylinder head.thanks

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Thermo goes with the spring end in the head and the rounded end facing up, not sure what you mean by does anyone know about the inlet gasket? it's a gasket like you have said...it sit's between the reedblock and inlet like you have already said... What else would you like to know? 

Got my barrel back this morning am impressed with the amount of workmanship put into it for the price
for 54 quid it include
piston and japanese piston rings
rebore to 58.4
Chamfering the damaged ports
Modyfying powervalve
and 24 hour delivery back
Paid for it at 5:15 pm yesterday and was delivered back to me at 9:15 am this morning.
In the piston ring kit I had the two rings and this.whats it for and where does it fit.presume it goes behind one of the rings but which one
also is there a certain way the rings go.like top and bottom etc or does it not matter as long as the chamfered edge lines up with the pin

Thanks nev is there any particular way round the rings go like top and bottom etc

Very important as to how you put your gudgeon pin circlips in too, again refer to manual.

Aye just print off the relevant stuff and bang it into one of those file holders with the see through sleeves. give me a shout if you can't find your manualI have one here

Sent

I ommitted that bumper ring on my builds and the Wossner kits don't include them.

Rings can go on either position.
That is also really good about the service

Both have identical markings only difference I can see is one measures 2.5 and one measures 2mm old rings are stuck on my old piston aswell so cant compare them as there stuck in the grooves

Spoke to grampian motors apparently the narrower ring goes on the bottom to compensate for the expander ring and the wider on the top.have put them on so the tapered edges line up with the pins.have also autosold the combustion area.whats the best way to modify the headgasket for the new larger bore

Ok thanks will do

i put it on my rebuild.. no reason not to really?

Top end is all back together now.also fitted the new inlet manifold gasket that came with the kit.all thats left to do now is refit carb powervalve motor and new oil feed pipe to inlet manifold.does the engine have to be running for the oil pump to pump oil out of the tube as when I pulled throttle back it didnt pump any oil out am going to bleed the oil pump just for safe measure.is there a better way of priming the new oil pipe other than in the haynes as engine is going to be starved of oil for a second or so while the pipe fills up

Just done a search and found my answer

-- Edited by madrevs on Sunday 2nd of March 2014 04:40:55 PM