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TL125S

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Johnny4428:
You would have thought the puller would have taken that Dave, quite a big boss on that sprocket giving it a big area to grip I guess. Nice work getting that off.

Laverda Dave:
The engine is now fully stripped, cleaned and measured with more horrors being revealed. A shim was missing on the mainshaft and this appears to have allowed the shaft to drift leaving marks on the crankcase. A washer had been placed behind the countershaft shim pushing the shaft to the right. I don’t know if the above are connected but the teeth on the idle starter gear are completly chewed up.

Moving to the oil pump and something big has passed through the rotors leaving these and the main body casting mangled (technical term) as well. I am surprised there was any oil pressure at all in the engine considering the state of the pump. Surprisingly though the main bearings are fine as are the rest of the gears, these engines were built to be abused! Upon taking the alternator cover off I notice a small 'dink' in the case. When I removed the coils the dink turned out to be a crack. considering this is oil filled I will have to get it welded.

So far the engine parts needed are, new piston and rings (CB550+1mm to give 138cc), new barrel (I managed to get one of these on eBay) cam chain, crankshaft end sprocket, Kickstart idler gear, shims, three ball bearing races, complete oil pump.

I’m back on to making more of the missing brackets today and hopefully I’ll be taking the frame off to be alignment checked in the next week or two.

Skoti:
Aye Dave,

I seem to remember the early TL125's having problems with broken kick start gears.
Which meant splitting the crankcases to repair them.

But yours appears to be the later engine with the detachable cam cover on the head, which allegedly had the kick start problem solved.

Maybe some others can remember doing this work as well back then?



Anyhow we sold many of those bikes to local farmers before the quad days.

Great wee machines, good luck with the resto.

Skoti

Oddjob:
This any use to you Dave, seems cheap enough.

https://www.ebay.co.uk/p/1215949232?iid=134482012557&fitmentTarget=Make%3AHonda%7CModel%3ATL

Laverda Dave:
Thanks for the heads up Ken.
I'm not sure if that set would suit the 'S' model with what is called the split head. I'm also looking at going out to 138cc (hence the 550+1mm piston. I'm still investigating what head gasket I need to use with the 138cc as a 150 will likely be to big and the 125 probably to small although I understand the 550 piston is flat topped (you probably know better than I do as you build 550 engines in your sleep!).
It's a shame though with that set being a genuine Honda set.

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