105 piston ring locating pin

[TomCarey]

Good evening all,

Im aware this subject has been well covered in the past but needed to
ask the question again.

Heard a "swooshing" sound coming from engine which apprears
to be rear bearing (no biggie) upon taking apart there is a deep score
in piston apparentley not a problem to use this piston again however
the locating pin has vanished as if by magic.. Now from what ive been
told this is now a new piston job as it cant be replaced is this all correct?

thank you in advance

[Flat Eric]

Yes, a new piston is required. They now come with a solid silver pin

[TomCarey]

Should my piston not be replaced due to a manufacturing defect thats forcing me to buy another piston?

[Flat Eric]

Good luck with that! I'm sure os denied there was any problem with the piston but they changed the design, go figure ��

[TomCarey]

Im sure i read on here a member also rung up about that and got a new piston.. Actually thinking about it the guage down the side
of my piston is pefect size for that locating pin and also the pitted marks on the crown on piston are probably from the chewed up bits
of the pin as it mangled its way through my engine

[waveydavey]

Yep, had my engine all but replaced and I know others have. Get onto RIPMAX and point them at the other threads. I spoke with a Peter Halman, a very nice man after contacting Japan direct and it went form there.


My theory is that the con rod wears and allows the piston to rotate slightly, wearing the pin as it does so. So for £16 or so I'd replace that too.

[TomCarey]

So they replaced your bits waveydavey?

[waveydavey]

Yep, I had to pay for the crank and the bearings if I remember right but that was it. The case was fine but the rest was replaced.

[TomCarey]

Ill be on the phone to ripmax in the morning, did you send your engine to them? There enfield
place is round the corner from my work so ill drop it in if need be.

[waveydavey]

I'd go with the gentle approach. I did send my engine to them after they asked me to, after inspection they offered to repair the engine with some FOC parts IE the bits that had been damaged in the latest failure and some parts I paid for.

[brin]

I did say at the time it looked like something like that happened.

Good evening all,

Im aware this subject has been well covered in the past but needed to
ask the question again.

Heard a "swooshing" sound coming from engine which apprears
to be rear bearing (no biggie) upon taking apart there is a deep score
in piston apparentley not a problem to use this piston again however
the locating pin has vanished as if by magic.. Now from what ive been
told this is now a new piston job as it cant be replaced is this all correct?

thank you in advance

[TomCarey]

spoke to peter, very helpful. they said drop engine in and they will sort it out.

[waveydavey]

A very nice man Pete, they come in for some criticism but I've found them nothing but helpful and very responsive

[Delarado]

A very nice man Pete, they come in for some criticism but I've found them nothing but helpful and very responsive

Agreed with Dave, Peter also sorted my engine, sent me some new bits FOC. I left my liner as it was as it was fine, but I replaced my con rod, and the piston and ring were provided by Ripmax.

[TomCarey]

should have engine back tomorrow, new piston, ring and head will be done by ripmax fully assembled.
Very good service.