Honda cb 125tdc

[lewishuggins1...]

poor bike died today.
does anybody have a complete head assembley.cant find one for love nore money.
also has anybody had or herd of a slight oil leak from the headgasket.the previous owner after i purchased the bike said i "did em up left to right as tight as i could"

YOU W####R EVER HERD OF A TORQUE WRENCH AND A HAYNES MANUAL

its distorted the head and is too far out to skim out in practicality.do you think a replacement head will solve the problem.
and would you advise to service the head de-coke it and valve stem seals.

chers for reading guys

[Pete.]

How much is it distorted? Is that the only problem the head is suffering?
____________________
a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[lewishuggins1...]

can fit a 2mm feeler gauge between head and a straight edge. and also after further inspection a hairline crack from the left hand sparkplug hole.
think the heads scrap to be onest.if the crack was not there it may be saveable possibly.but may find a suitable replacement

[Pete.]

You're right it's scrap. Don't sling it in the bin, because all the bits inside like cams and followers are expensive and hard to find.
____________________
a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[lewishuggins1...]

Thanks for your advice i will store the parts in the broken parts box.
Any ideas where to find a new head.Or anybody on here who will have such a sacred stash of ageing components.

[Pete.]

I've asked the only person I think might have one. TDC heads are like hens teeth.
____________________
a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[Frost]

There was somebody on here asking about CB125's a week or so ago. we all warned him that the top ends weren't so great

De coke is no doubt a good idea, same goes for stem seals. You might have to get it skimmed regardless and hope for the best. Taking some measurements you could work out the compression ratio, and possibly fit a thicker gasket if it's too high.

[Pete.]

What year bike is it?
____________________
a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[Teflon-Mike]

[Frost]

Mine had oil starvation that lead to loss of compression on the left hand cylinder. It was a quick bike before that, 75 even 80 with a hill assist, after it drank more oil than i expected and staved it a bit it was 70 MAX that was indicated to so probably more like 65.

Would a 250 engine fit in mike?

[Pete.]

Mike my brother had a CB125T and a TDC and it was a long time ago now but I'm sure the T cam would not go into the TDC head. Some feature on the cam that didn't line up.
____________________
a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[lewishuggins1...]

Its a 1982 model.May have to get it skimmed and hope for the best.
if anybody knows of one hanging about tho.this will be a tempoary fix

[Pete.]

Lewis look at this ebay auction, in the text he says he has a running engine:

https://cgi.ebay.co.uk/HONDA-CB125TDC-IGNITION-COIL-CB125-TWIN-CB-125-TDC-/280627712251
____________________
a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[lewishuggins1...]

YOUR A STAR!!!!! just messaged him and not a million miles from here.
fingers crossed thanks guys.
does anybody know a good company to use to rebore a set of barrels.the bikes dont 22 thousand miles would it be worth getting them done and treat her to a new set of pistons while the head is off ?

[Pete.]

My mate thinks he might have one. He's going to check tomorrow.
____________________
a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good